Archaeological excavations of Mound 6 at Ngre Kataa in 2009 expose a workshop where blacksmiths produced iron and copper-alloy tools and ornaments. The mound is being excavated in 2 x 2 meter units named for the coordinates of their northeast corner. In unit 50N 0W (foreground), an area of burned soil marks the location where blacksmiths heated metals. A pottery jar sits in place to the right. In surrounding units (50N 2W, 48N 0W, 48N 2W) are large anvil stones where the hot metals would have been hammered and shaped through forging. The mound's stratified deposits suggest that the workshop area was used for many decades, and perhaps centuries, between the years of about 1350 and 1520 CE (Common Era). View across the mound from the northeast looking towards the southwest. Site Ngre Kataa. 27 June, 2009.
Several grinding stones, a whole pot and a cluster of pottery sherds have been exposed in situ at the base of level 3, unit 44N 4W at Mound 6, Ngre Kataa. The large grinding stone in the foreground (grinding stone 1, NK-08-112) is oriented with its grinding surface facing down. Another smaller stone rests on a soil pedestal created as archaeologists excavated surrounding soil to a lower level. Upper right, a whole pottery jar (NK-08-176) sits next to a large grinding stone (grinding stone 3, NK-08-173) oriented with its grinding surface up. To the far left, above the photo scale in centimeters, archaeologists have exposed the edges of a pottery jar, broken in half and lying on its side. As excavations extended into the adjacent unit (42N 4W, to the left), this broken pot was found to be associated with two tuyere fragments. This cluster of grindstones, tuyeres and nearby burned features is interpreted as part of a larger metal-working workshop, the activities of which led to the build up of mound 6. The soil on the right side of the unit is darker because it is moister than that on the left. View to west. Site Ngre Kataa. 1 July, 2008.
Excavations in unit 42N 4W have exposed clusters of pottery, grinding stones, tuyeres and an area of burned soil associated with metal working at Mound 6, Ngre Kataa. Foreground, left, a grinding stone (GS 08-10) rests with its working surface face down. It sits at a slightly higher level than a nearby (left) whole pottery jar (NK 08-406). To the right of these, a partial pot (NK 08-282) and a tuyere fragment (NK 08-284) are clustered together with two halves of a broken pottery jar, lying with its exterior surface facing down. To the south (behind), near the sign board and framed by photo scales, is a burned feature. Next to it sits a hand-held hammerstone (GS 08-11). Another partial pottery jar (NK 08-520) and a small flat grinding stone (GS 08-12) have been exposed to the left of the sign board at 77 cm below the unit's datum. The narrow dark bands visible in the soil are the traces of animal burrows. Photo scale adjacent to the sign board in centimeters. View looking south. Site Ngre Kataa. 7 July 2008.
The circular outline of a burned basin (Feature 3) is bracketed by photo scales (center) in unit 50N 4W (130 cm below the unit datum) at Mound 6. A pottery jar sits to the right side of the basin, its opening covered by a potsherd lid. To the left, a grinding stone sits, grinding surface down, over top of another pottery jar. Burned features like these were associated with metal working in this Mound 6 workshop area. Photo scale at bottom in centimeters. Site Ngre Kataa. 29 June, 2009.
The circular outline of a burned basin (Feature 3) is bracketed by photo scales (left of center) in unit 50N 4W (130 cm below the unit datum) at Mound 6. A pottery jar sits to the right side of the basin, its opening covered by a potsherd lid. To the left, a grinding stone sits, grinding surface down, over top of another pottery jar. Another grinding stone (far left) sits at a higher level in unit 50N 6W. A second burned feature is associated with a grinding stone tipped on its side, far right. Another pottery jar sits nearby, also lidded with a broken sherd. Burned features like these were associated with metal working in this Mound 6 workshop area. Photo scale at bottom in centimeters. Site Ngre Kataa. 29 June, 2009.
A finger ring made of twisted copper alloy wire is photographed in situ. Base of level 5, unit 44N 4W, Mound 6, Ngre Kataa. Scale in 5 centimeter increments. Ngre Kataa, 8 July, 2009.
The mouth of a perforated shrine pot (left) is covered with the pedestaled base of another pot. It remains in situ as the surrounding areas of unit 46N 2W are excavated to lower levels. Behind, the stratified layers of Mound 6 are visible in the unit's north wall. Center (back) are a series of anvil and grinding stones exposed at higher mound levels in other excavation units. During excavations in 2008, a cluster of four anvil/grinding stones was found at a level slightly higher than but adjacent (left/west) to the perforated pot. At right, in lower levels, two grinding stones rest at an angle in association with a burned feature. Archaeologists interpret Mound 6 as a metallurgical workshop at which stratified levels built up through repeated use of the same location. Photo scale in centimeters. Site Ngre Kataa. 2 July, 2009.
Insitu pottery and iron artifacts associated with clusters B and C of what archaeologists interpret as a shrine (clusters A-D) which capped stratified deposits in a metallurgical workshop. Far left in unit 48N 10W, the flat surface of an anvil/grinding stone (GS 09-32) is exposed, to the left (west) of which a poorly preserved portion of an elephant tusk was found (now removed). To the right (east) of the large stone is Cluster B, which includes the group of sherds seen in the vertical exposure in front and left (west) of the tree stump. Behind the tree stump is a large cluster (C) of pottery lids, partial pots and iron objects. Photo scale marked in 5 cm increments. View looking towards northwest. Site Ngre Kataa. 10 June 2009.
Insitu pottery and iron artifacts associated with clusters B-D of what archaeologists interpret as a shrine (clusters A-D) which capped stratified deposits in a metallurgical workshop. Bottom left, at the base of a balk supporting the unit peg, is cluster D, comprised of two stones flanking an iron disc, laid flat (SF 09-158), and a tri-looped iron bangle (SF 09-159). In front and left (east) of the tree stump is a large cluster (C) of pottery lids, partial pots and iron objects, including an iron bangle (SF 09-148) and a pair of miniature iron manacles (SF 09-171, "B"-shaped object). To the right (west) of the tree stump, another cluster of pottery and iron objects can be seen. Top right of the photo, a yellow notebook rests on top of an anvil/grinding stone (GS 09-32), next to which rested a poorly preserved section of an elephant ivory tusk. North arrow photo scale marked in 5 cm increments, arrow pointing north. View looking towards southwest. Site Ngre Kataa. 10 June 2009.
View across open excavations in an area (mound 6) that archaeologists interpret as a metallurgical workshop. The photo centers on units 46N 8W (foreground) and the southern half of 48N 8W, the north wall of which (at 47N) can be seen behind the sign board. The exposed areas were excavated in 2008 and the photo taken in preparation for 2009 excavations. Traces of circular burned features, red-orange and yellow in color, can be seen in the freshly scraped surface of these units. The uppermost north arrow sits to the right (east) of the circular outline of a still-buried everted-rim jar. Another everted-jar rim can be seen exposed in the north wall at 47N. This rim and associated artifacts formed cluster B, part of a larger shrine feature (clusters A-D) that extended across the northern half of unit 48N 8W (beneath and behind the small tree trunk visible above and left of the sign board). Cluster A (unit 46N 8W) comprised a large pottery bowl surrounded by six iron bangles that was removed in 2008. It was positioned above and slightly west (left) of the burned feature (center photo) that is intersected by a tree root. Cluster B included the artifacts seen here in the north wall at 47N, together with an associated cluster of a pedestal-handled pot lid, dog skull and jaw bones revealed by further excavation beneath and west (left) of the tree stump. In the upper right of the photo (north and east), insitu anvil (GS 09-15, left) and grinding (GS 09-12, right) stones are visible in unit 50N 6W. Photo scales marked in 5 cm increments and measuring tape marks 2 m. Arrows pointing north. Site Ngre Kataa. 6 June 2009.
Insitu anvil/grinding stones in excavation unit 50N 6W in an area (mound 6) that archaeologists interpret as a metallurgical workshop. A large anvil stone (GS 09-15, foreground, left) sits next to a small stone, its lower surface worn flat by serving as a hand-held grinder. A large tree root is visible to the west of the stone, behind which is an area of unexcavated soil on top of which pottery sherds had been found (now removed). To the east and flanked by the black-and-white photo scale is the partial rim of an everted-rim jar (NK 09-749). To the north of this, a large flat grinding stone (GS 09-12) has been pedestaled in place. Photo scales marked in 5 cm increments. Arrows pointing north. Site Ngre Kataa. 6 June 2009.
Rights:
Creative Commons Attribution-NonCommercial
Publisher:
University of Victoria Libraries
Provenance:
Ngre Kataa, Mound 6, Unit 50N 6W, Level 4
Date:
2009-06-06
Location(s) Facet:
Ngre Kataa
Subjects:
Anvil stone; Grinding stone
Subjects Facet:
Excavations (Archaeology); Pottery; Metalworking; Iron
Insitu anvil/grinding stones in excavation unit 50N 6W in an area (mound 6) that archaeologists interpret as a metallurgical workshop. Left of center photo, a large anvil stone (GS 09-15) sits next to a small stone, its lower surface worn flat by serving as a hand-held grinder. Behind this stone is an area of unexcavated soil on top of which pottery sherds had been found (now removed). Lower foreground, flanked by the black-and-white photo scale, is the partial rim of an everted-rim jar (NK 09-749). To the north of this (right), a large flat grinding stone with a well-worn upper surface (GS 09-12) has been pedestaled in place. Visible in the southern corner of the west wall of the unit (upper left) in this photo is a flat iron disk (SF 09-159), embedded in the wall above a small stone. Photo scales marked in 5 cm increments. Arrows pointing north. Site Ngre Kataa. 6 June 2009.
Rights:
Creative Commons Attribution-NonCommercial
Publisher:
University of Victoria Libraries
Provenance:
Ngre Kataa, Mound 6, Unit 50N 6W, Level 4
Date:
2009-06-06
Location(s) Facet:
Ngre Kataa
Subjects:
Anvil stone; Grinding stone
Subjects Facet:
Excavations (Archaeology); Pottery; Metalworking; Iron
Insitu pottery and iron artifacts associated with clusters C and D of what archaeologists interpret as a shrine that capped stratified deposits in a metallurgical workshop. Cluster D appears in the foreground, left, below unexcavated soil remaining around the 48N 8W unit peg. Here two small stones flank a flat iron disc (SF 09-159, left) and a tri-looped iron bangle (SF 09-158, right). Cluster C is a large grouping of pottery and iron objects located north of the tree stump, center photo. Included were several whole pottery lids, a broken but mostly complete jar associated with an iron bangle (SF 09-148) and a pair of miniature iron manacles (SF 09-171). The bangle is visible, resting on a soil pedestal in front of the tree trunk's center. In the photo's upper right, a large anvil stone (GS 09-32), on which sits a yellow notebook, is visible. Flanking this stone on its western edge was a portion of an ivory tusk. Photo scale marked in 5 cm increments. Arrow pointing north. Site Ngre Kataa. 10 June 2009.
Insitu pottery and iron artifacts associated with cluster C of what archaeologists interpret as a shrine (clusters A-D) that capped stratified deposits in a metallurgical workshop. Center photo are two large pieces of an everted-rim jar, its exterior surface facing outward. Immediately above is a large portion of the same pot, its interior surface facing outward. Found positioned against the jar's interior surface was a pair of miniature iron manacles (SF 09-171, "B"-shaped object). An iron bangle (SF 09-148) was positioned at the jar's mouth, above the manacles. To the left of the bangle is the upper edge of a large grinding stone (GS 09-26), which later excavations revealed to be oriented with its grinding surface down. To the right of the bangle, a pedestal-handled pot lid (NK 09-381) rests with its interior surface oriented upward. At center photo, bottom, a pot lid with a strap handle (NK 09-382) rests on its side. To the right of the north arrow, portions of an another pedestal-handled pot lid lie with its interior oriented upward. Photo scale at upper right marked in cm. Arrow pointing north. Site Ngre Kataa. 10 June 2009.
Insitu pottery and iron artifacts associated with cluster C of what archaeologists interpret as a shrine (clusters A-D) that capped stratified deposits in a metallurgical workshop. Lower center of the photo are two large pieces of an everted-rim jar, its exterior surface facing outward. Immediately above is a large portion of the same pot, its interior surface facing outward. Found positioned against the jar's interior surface was a pair of miniature iron manacles (SF 09-171, "B"-shaped object). An iron bangle (SF 09-148) was positioned at the jar's mouth, above the manacles. To the left of the bangle is the upper edge of a large grinding stone (GS 09-26), which later excavations revealed to be oriented with its grinding surface down. To the right of the bangle, a pedestal-handled pot lid (NK 09-381) rests with its interior surface oriented upward. Photo scale marked in cm. View looking south. Site Ngre Kataa. 10 June 2009.
Excavation of a shrine cluster, two images. The image on left shows a pottery cluster, first exposed in June 2008, as it appeared on 10 June 2009. At bottom center of this image is a pedestal base, above which is a tight cluster of rim sherds. The curved sherd on the far right in this image is the outer edge of the pedestal-handled lid, which is fully exposed in the photo on the right, taken on 16 June 2009. A dog skull in a highly friable state is visible above and to the right of this lid in both photos. In the imgae on the right, an iron bangle (SF 09-219) can be seen resting in an angled position, below and left of which is a dog mandible. These were uncovered by excavation below and behind the pedestal base seen in the picture on the left. Photo scale marked in 5 cm increments. Site Ngre Kataa. 10 and 16 June 2009.
Two views of insitu anvil/grinding stones in excavation unit 50N 6W, part of an area (mound 6) that archaeologists interpret as a metallurgical workshop. In the photo looking northward (arrows point north), a large anvil stone (GS 09-15, foreground, left) sits next to a small stone, its lower surface worn flat by serving as a hand-held grinder. A large tree root is visible to the west of the stone, behind which is an area of unexcavated soil on top of which pottery sherds had been found (now removed). To the east and flanked by the black-and-white photo scale is the partial rim of an everted-rim jar (NK 09-749). To the north of this, a large flat grinding stone (GS 09-12) has been pedestaled in place. In the view looking west, the well-worn upper surface of this narrow stone can be seen. Visible in the southern corner of the west wall of the unit (upper left) in this photo is a flat iron disc (SF 09-159), embedded in the wall above a small stone. Further excavation showed that this disc was part of an object cluster that included a tri-looped iron bangle and interpreted as part of a shrine. Photo scales marked in 5 cm increments. Arrows pointing north. Site Ngre Kataa. 6 June 2009.
An insitu iron bangle (SF 09-132) made from a flattened iron rod with overlapping ends. The bangle occurred as an isolated find in the upper levels of an area (mound 6) that archaeologists interpret as a metallurgical workshop. Photo scales marked in 5 cm increments. Arrow pointing north. Site Ngre Kataa. 6 June 2009.
Insitu pottery and iron artifacts associated with clusters B and C of what archaeologists interpret as a shrine that capped stratified deposits in a metallurgical workshop. Cluster B encompassed the objects on the south (right) side of the photo, west of (below) the tree stump. To the right of the black-and-white photo stick (lower right) is an iron spike (SF 09-174), a half bangle (SF 09-173) and a slightly curved iron disc (SF 09-172) in a carefully placed composition. Immediately to the east (above in the photo), an aglomeration of pottery sherds is stacked. Later excavation revealed a pedestal-handled pottery lid, dog skull and jaw bones carefully placed below these sherds in cluster B. Cluster C encompassed the artifacts to the north (left) of the tree stump. These included a series of pottery lids, portions of single pottery jar and sherds from other pots. An iron bangle (SF 09-148) is visible above and slightly left of the top photo scale, sitting adjacent to a pottery lid (NK 09-381) lying with its interior surface up. This wider shrine assemblage overlaid burned features associated with metalworking activities. Black-and-white photo scale in 5 cm increments. Arrows pointing north. Site Ngre Kataa. 10 June 2009.
A cluster of burned features is exposed in the northwest corner of excavation unit 50N 8W in an area interpreted by archaeologists as a metallurgical workshop (mound 6). Along the unit's west wall (left in photo) is an amorphous zone of fire-hardened red (Munsell color 2.5YR 3/6) matrix. A piece of brass bar (SF NK 09-293) was found in soil associated with this burned feature. Above and to the right (northeast), two circular burned features are visible in outline. These basin-shaped features had a thin lining of fire-hardened sediment, red to dark red (Munsell 2.5 YR 3/6 & 4/8) in color. The basins were filled with loose ashy sediment and small pieces of charcoal. A sample of burned matrix from feature 1 (top right basin) yielded a thermoluminescence (TL) age estimate of 1500 +/- 40 CE (Univ. Wash. 2455). Further excavation revealed additional basin-shaped features beneath the amorphous burned feature. The excavation unit's northwest corner peg is visible, upper left. View looking north. Site Ngre Kataa. 27 June 2009.
A cluster of burned basin-shaped features is exposed in the northwest corner of unit 50N 8W in an area interpreted by archaeologists as a metallurgical workshop (mound 6). The basins comprised a thin layer of fire-hardened sediment, red to dark red (Munsell colors 2.5 YR 3/6 & 4/8) in color. Basin features 1 (top right) and 2 (left of feature 1) measured about 8-9 cm deep and were filled with ashy soil. Basin feature 5 (far left) was shallower. Its fire-hardened surface showed a pinkish tinge. Samples of burned basin matrix from features 1 and 5 yielded thermoluminescence (TL) age estimates of 1500 +/- 40 CE (feature 1; Univ. Wash. 2455) and 1580 +/- 40 CE (feature 5; Univ. Wash. 2456). Photo bar marked in 5 cm increments. Arrows pointing north. Site Ngre Kataa. 29 June 2009.
A boulder used as an anvil stone (GS 09-07) sits insitu in an excavated area interpreted as a metallurgical workshop. A black-and-white photo scale stick stands vertically against it. The boulder's upper surface shows signs of use wear and its north-facing side is marked by a cup-shaped depression that resulted from repeated use. To the north (left), a fist-sized hammer stone (GS 09-09) rests insitu on a pedestal of soil left in place as the unit was excavated. Two stones showing evidence of use as grinding stones sit nearby, a north arrow placed by one(GS 09-10; center photo) and one in the southwest corner of the excavation unit (GS 09-08; bottom right). Another insitu anvil stone (GS 09-6) sits in the northeast corner of an adjacent excavation unit (48N 0W; top right of photo). The narrow band of loose soil angled across the southwest corner of the excavation was created by a burrowing animal. Photo stick and small arrow scale in 5 cm intervals. Photo scale arrows pointing north. Site Ngre Kataa. 2 June 2009.
A boulder used as an anvil stone (GS 09-01) sits insitu in an excavated area interpreted as a metallurgical workshop. This was one of several boulders associated with burned features and other residues of metalworking. The boulder's upper surface showed signs of use wear and its south-facing side is marked by a deep cup-shaped depression that resulted from repeated use. A burned feature interpreted as the remains of a forge is visible behind the anvil stone (upper left) in the northwest corner of excavation unit 50N 2W. Flat photo scale in cm. Arrow pointing north. Site Ngre Kataa. 1 June 2009.
Excavations uncovered three insitu boulders placed in a row that were used as anvil stones in an area interpreted as a metallurgical workshop. Multiple surfaces of the boulders show signs of wear caused by hammering and grinding. Repeated use of the anvil stone in the foreground (GS 09-03) has created a clear depression on its upper surface and its left side is flattened by wear. The middle anvil stone (GS 09-02) has multiple depressions created by use on its upper surface. The anvil in the rear of the photo (GS 09-01) shows wear on its top and side surfaces, with dirt still embedded in a deep cup-shaped depression on its south-facing side in this photo. To the east (right) of the boulder in foreground, the flat surface of a grinding stone (GS 09-04) is visible in the east wall of the excavation unit. A broken pedestal base of a pot sits on its side to the east (right) of the middle anvil stone. In the upper left corner of the photo, a burned feature interpreted by archaeologists as the remains of a forge has been exposed. The red-and-white band above the photo sign is a two meter scale, marked in 10 cm increments. View looking north across two exavation units: 50N 2W (top of photo) and 48N 2W (bottom of photo). The 2x2m units have been excavated to slightly different depths. Site Ngre Kataa. 1 June, 2009.
The southeast corner of excavation unit 50N 0W in mound 6 shows stratified layers that accumulated in an area interpreted as a metallurgical workshop (mound 6). An anvil stone (top of photo; GS 09-06) is pedestaled insitu in the adjacent excavation unit (48N 0W). This stone was found immediately below the mound's top surface. A smaller grinding/anvil stone is visible in the east wall of unit 50N 0W, at a depth of one meter below. Burned orange-red lenses that archaeologists interpret as features associated with processing metals are visible in the strata between the stones. Evidence suggests that these layers built up through repeated use of this location for metalworking activities. Stadia rod numbered intervals of 10 cm. View looking south. Site Ngre Kataa. 9 July 2009.
The south wall of excavation unit 50N 0W in mound 6 shows stratified layers that accumulated in an area interpreted as a metallurgical workshop. An anvil stone (GS 09-06; left of the sign board) is pedestaled insitu in the adjacent excavation unit (48N 0W). Other pedestaled grinding stones are visible to the right and behind the sign board. These stones were found just below the mound's top surface. A smaller grinding/anvil stone is visible in the east wall of unit 50N 0W, at a depth of one meter below the anvil stone. Burned orange-red lenses that archaeologists interpret as features associated with processing metals are visible in the strata between the stones. Ashy lenses are visible in the south and west walls. Evidence suggests that these layers built up through repeated use of this location for metalworking activities. Width of unit: 2 meters. Site Ngre Kataa. 9 July 2009.
View across four excavation units, looking west across an area interpreted as a metallurgical workshop. An anvil stone (GS 09-01) sits insitu in the foreground in unit 50N 2W. In the northwest corner of the same unit (below the roll of red flagging tape, right), the remains of a partially excavated burned feature interpreted as a forge are visible. A pottery jar (NK 09-686), lidded with a broken rounded base of another pot, is visible in the next unit (50N 4W). It sits adjacent to another burned feature in the unit's northwest corner (behind the pot, not visible in this photo). The jar is overlaid by another burned feature (visible as a layer of orange soil). A second pot (NK 09-685), to the left of the first, is covered by a flat stone (GS 09-13) whose lower surface shows evidence of grinding. A larger flat U-shaped grinding stone (GS 09-12) sits insitu atop a soil pedestal in the northeast corner of the next unit (50N 6W). To the south (left) of the stones, a partially exposed jar rim (NK 09-749) is visible close to the eastern edge of unit 50N 6W). Behind it, a large anvil/grinding stone (GS 09-15; faintly visible because it blends into the surrounding soil color) is partially exposed, with a smaller hammer/grinding stone (GS 09-16) sitting in front and left (south) of the large stone. A smaller grinding stone (GS 09-19; upper left of photo) has been pedestaled insitu in the farthest unit (50N 8W). Subsequent excavations in unit 50N 8W revealed a series of burned features in its northwest corner. A two meter yellow tape is extended along the edge of unit 50N 4W (right). Site Ngre Kataa. 24 June 2009.
Rights:
Creative Commons Attribution-NonCommercial
Publisher:
University of Victoria Libraries
Provenance:
Ngre Kataa, Mound 6, Units 50N, 2 to 8 W, various levels
A boulder used as an anvil stone (GS 09-07) sits insitu in an excavated area interpreted as a metallurgical workshop. A black-and-white photo scale stick stands vertically against it. The boulder's upper surface shows signs of use wear and its north-facing side is marked by a cup-shaped depression that resulted from repeated use. To the north (left; center photo), a fist-sized hammer stone (GS 09-09) rests insitu on a pedestal of soil left in place as the unit was excavated. Another stone that shows evidence of use as a grinding stone sits nearby (GS 09-10; left in photo). The narrow band of loose soil angled across the southwest corner of the excavation unit (right of photo) was created by a burrowing animal. Photo stick and small arrow scale in 5 cm intervals; large arrow in 10 cm intervals. Photo scale arrows pointing north. Site Ngre Kataa. 2 June 2009.
Three burned features are visible at the base of level 6 in unit 46N 2W. Two circular features (F1, right & F2, left) have been cross-sectioned, creating a straight edge. Burned feature 3 is an irregularly shaped (rectangular) area pedestaled on the east (right) side of the excavation unit. Along the unit's west wall (left) is an unexcavated rectangular area. Within this matrix was a perforated pot (NK 09-789) lidded with the pedestal base from another pot. The perforated pot contained cowries and small fragments of iron. In units to the north (behind), a row of insitu anvil stones (GS 09-03, -09-02 and 09-01, near to far) is visible in units 48N 2W and 50N 2W. To the east (right) of these, a flat grinding stone (GS 09-08) and an anvil stone (GS 09-06) can be seen insitu in units 48N 0W and 50N 0W. A pottery jar (NK 09-790) rests insitu in the center of unit 50N 0W. To the left of the archaeologist in the blue shirt (Abass Iddrisu), a flat grinding stone (GS 09-12) and a pot (NK 09-685) lidded with a grinding stone (GS 09-13) are visible on the boundary between units 50N 4-6W. Excavation units measure 2 x 2 meters. Site Ngre Kataa. 24 June 2009.
A large insitu anvil/grinding stone in an area interpreted by archaeologists as a metallurgical workshop (two views). It is associated with several smaller stones that show signs of use as grinding or hammer stones. On the northwest side of the large stone (GS 09-15) is a partial pottery vessel--unusual for its layered construction (NK 09-787). Sitting adjacent to the partial pot are two flat iron discs (larger one, above in photo 1, SF 09-370 and smaller, below in photo 1, SF 90-371). A smaller grinding stone (GS 09-24) sits northeast of the anvil stone, positioned with its grinding surface down. It rested on top of a pottery jar (NK 09-788) which was exposed in the next excavation level. An area of fire-hardened sediment to the southeast of the anvil stone (photo 2) is interpreted as part of a forging feature. Photo scale bar in 5 cm increments. Photo arrow pointing north. Site Ngre Kataa. 4 July 2009.
View from above of an insitu grinding stone (GS 08-03) and a pottery jar (NK 08-176) at the base of excavation level 3 in an area (mound 6) that archaeologists interpret as a metallurgical workshop. The grinding stone has a concave upper surface, partly obscured by unexcavated soil. Roots and rootlets are visible on the right side of the photo. Photo stick marked in 5 cm increments. Arrow pointing north. Site Ngre Kataa. 1 July 2008.
Excavations in units 42N 4W and 44N 4W have exposed clusters of pottery, grinding stones, tuyeres and an area of burned soil associated with metal working at mound 6, Ngre Kataa. Foreground, bottom right, are a partial pottery jar (NK 08-520) and a small flat grinding stone (GS 08-12; partially visible). To the left (west), framed by photo scales, is a burned feature. Next to it sits a hand-held hammerstone (GS 08-11). Above (to the north), a cluster of pottery and a partial tuyere (NK 08-284) are visible along the boundary between excavation units (marked by stakes). To the right of that cluster (east), a grinding stone (GS 08-10) has been pedestaled where it was found, resting with its working surface face down. Two pottery vessels sit at a slightly lower level (NK 08-406). Top center of the photo, at the far end of the excavated area, a cluster of anvil stones is visible (GS 08-05 to 08) in excavation unit 46N 4W. Photo scale adjacent to burned feature marked in 5 cm intervals. View looking north. Site Ngre Kataa. 7 July 2008.
Wide view of excavation unit 44N 6W in an area (mound 6) that archaeologists interpret as a metallurgical workshop. Lower left, below the unit's corner stake (44N 6W), the partial rim of an everted jar (NK 08-408) has been pedestaled. It rests with its rim down. Between it and a large anvil stone (GS 08-25, center photo) is a smaller light-colored stone (GS 08-21) and piece of a jar rim. Another jar rim (NK 08-409) has been pedestaled in place to the left (east) of the anvil stone. Behind the anvil stone, an everted-rim jar (NK 08-407, photo stick in front) has been partially exposed. In the unit's center, to the right of the anvil stone, the rounded edge of a burned feature is visible. To the right (west) and in front (north) of that, a photo scale sits alongside an iron projectile point (SF 08-112). The soil around it has been dampened to aid excavation (dark circular area). To its right (west) is another piece of a worn grinding stone (GS 08-20). Visible in the adjacent units (left, east) is a grindstone (GS 08-10) which has been pedestaled in place and to its right a cluster of pottery and a tuyere (NK 08-284). View looking south. Photo bar marked in 5 cm intervals. Site Ngre Kataa. 7 July 2008.
A pottery lid (NK 09-626) is positioned vertically with its interior surface facing south. Above it (slightly right) is a poorly preserved, friable dog skull. A large tree root has been truncated above and left of the pot lid. Beneath the lid is an iron bangle (SF 09-219), angled upward. The bangle is pressed up against a dog mandible, which has been placed at a diagonal angle below the pot lid, its mandibular joint oriented upward. Several teeth remain in the mandible. A burned feature can be seen immediately below this assemblage of objects. This cluster (B, 11) was part of a larger set of clusters (A-D) that archaeologists interpret as a shrine in a metallurgical workshop. Photo scale at top in cm. Arrow pointing north. Site Ngre Kataa. 16 June 2009.
A fragmented pottery lid (NK 09-626) is positioned vertically with its interior surface facing south. A large tree root is visible behind the lid, below the sign board. A dog cranium positioned above and an iron bangle placed below the lid have been removed. Additional excavation has exposed several pottery rim sherds below a dog mandible, which is positioned diagonally below the pot lid with its mandibular joint oriented upward. Several teeth remain in the mandible. A second less well-preserved dog mandible has been exposed below this. A burned feature can be seen immediately below this assemblage of objects. This cluster (B, 11) was part of a larger set of clusters (A-D) that archaeologists interpret as a shrine in a metallurgical workshop. Photo scale marked in 5 cm increments. Arrow pointing north. Site Ngre Kataa. 30 June 2009.
An insitu anvil stone (GS 08-25) is surrounded by several fragmentary and one complete pottery vessel (NK08-407) in an area that archaeologists interpret as a metallurgical workshop. At the top and center (southeast) is a cluster of sherds from a broken pot and a piece of a tuyere. In the lower right, to the west of the anvil stone and framed by photo scales, is a circular burned feature (Feature 2) with an outer ring of oxidized red sediment (Munsell 2.5YR 5/6) and a yellowish red (Munsell 5YR 4/6) center. Features similar to this appeared across this workshop area and may have been created by exposing rounded base containers to high heat. A yellow glass bead (SF 08-234) was found in the fill of a shallow feature characterized by ashy soil and charcoal located immediately south (lower right) of the burned feature. Black-and-white photo scale marked in 5 cm increments. View looking southeast. Site Ngre Kataa. 8 July 2008.
The body and base of a large pottery bowl has been exposed by exavation in unit 46N 8W. Surrounding this bowl was a cluster of sherds from other pottery vessels, now removed to expose several iron bangles of different shapes and sizes, seen insitu here. Between the bowl and the photo scale is an iron bangle (SF NK 08-169) formed from a spiral-twisted rod. Pedestaled to the right of the bowl (east) is an iron bangle (SF NK 08-140) made from a round rod that was coiled. Visible in the wall behind and to the right of the bowl (north) is a smalled coiled iron bangle made from a flattened piece of iron (SF NK 08-182). This cluster (A) was part of a larger cluster (A-D) of artifacts that archaeologists interpret as a shrine placed in a metallurgical workshop. Rootlets are visible in the wall and floor of the unit. View looking north. Photo scale in 5 cm increments. Site Ngre Kataa. 9 July 2008.
A tree that took root atop a shrine cluster has been cut back to a stump (center photo). Most of the objects in the shrine clusters (B-C) have been removed. To the left and below the tree stump, clusters of pottery (10 & 11) can be seen, including a red-colored pottery lid oriented vertically (cluster 11). An iron bangle, a dog cranium and dog mandibles were found associated with that lid. To the right (north) of the stump, a tri-looped iron bangle (SF 09-218) has been pedestaled (left of the black-and-white photo scale stick). The level above this had been covered by a cluster (cluster C) of pottery, including several pot lids, together with an iron bangle and a miniature pair of iron manacles. To the east and west, two large anvil stones are visible, one to the right (east) of the tree stump (GS 09-26) and one to the left (west, GS 09-32). To the left of the stump, a burned feature is visible below the pottery cluster (cluster 11). Photo scale bar marked in 5 cm increments. Arrow pointing north. Site Ngre Kataa. 16 June 2009.
A cluster of four large insitu anvil/grinding stones in an area (mound 6) that archaeologists interpret as a metallurgical workshop. The stone at the bottom of the photo (GS 08-06) was oriented with its grinding surface down (not, therefore, visible in the photo). The middle right stone (GS 08-07) also rested with its most-used grinding surface down. The largest stone (middle, left, GS 08-05) had no clear working surface. The stone at the back (GS 08-08) was associated with a fist-sized round quartz hammerstone, seen insitu slightly above. Later exavations (2009) revealed a perforated pot (NK 09-750), lidded with the base of another pot (NK 09-750), adjacent to but approximately 40 cm below this cluster in the next excavation unit. Photo scale in 5 cm increments. Arrow pointing north, view looking east. Site Ngre Kataa. 3 July 2008.
A small round stone (GS 08-11) rests insitu next to an irregularly shaped area of burned fire-hardened sediment in an area (mound 6) that archaeologists interpret as a metallurgical workshop. The stone has wear consistent with use as a hammerstone. The burned sediment was next to a circular area of soil that showed signs of oxidation through exposure to high heat. A small piece of copper alloy metal lies at the edge of the fire-hardened sediment, to the left of the hammerstone and above the right site of the photo stick. The feature is likely associated with forging activities. Photo scale at bottom marked in 5 cm intervals. View from above, north at top of photo. Site Ngre Kataa. 5 July 2008.
The body and base of a large pottery bowl has been exposed by exavation in unit 46N 8W. Surrounding this bowl was a cluster of sherds from other pottery vessels, now removed to expose several iron bangles of different shapes and sizes, seen insitu here. At the base of the photo, center, is an iron bangle (SF NK 08-169) formed from a spiral-twisted rod. Pedestaled to the right of the bowl (east) is an iron bangle (SF NK 08-140) made from a round rod that was coiled. Visible in the wall behind and to the right of the bowl (north; above the photo scale) is a small coiled iron bangle made from a flattened piece of iron (SF NK 08-182). A smaller bangle-like artifact lies directly above the pot, center photo (north; SF 08-139). This area (cluster A) was part of a larger cluster (clusters A-D) of artifacts that archaeologists interpret as a shrine placed in a metallurgical workshop. Rootlets are visible in the wall and floor of the unit. View from above, north at top of photo. Photo scale in cm increments. Site Ngre Kataa. 9 July 2008.
An arc of orange-red burned features has been exposed in excavation units 46N 8W and 48N 8W in an area (mound 6) that archaeologists interpret as a metallurgical workshop. To the left (west), the body and base of a large pottery bowl (NK 08-522) has been pedestaled insitu. A number of iron bangles surrounded this bowl (cluster A) as part of a large shrine cluster that extended into adjacent units (where the trunk of a small tree is visible, upper left). The base of this cluster was about 20-30 cm above the burned basins exposed in this photo. Center photo, flanked by photo scales, the round rim of a pottery jar is visible in outline. To the right (east) of the burned features, two hammerstones rest insitu next to one another. To the north of the burned features (forward right of the sign board), a zone of white plaster-like sediment is visible. Far right, archaeologist Abass Iddrisu uses a trowel to expose the contours of burned sediment in an adjacent excavation unit. Red and white scale is two meters in length. Arrow pointing north. Site Ngre Kataa. 17 July 2008.
A large grinding stone (GS 08-04) rests insitu along the south edge of unit 48N 4W in an area (mound 6) that archaeologists interpret as a metallurgical workshop. The stone's visible surface is concave in profile, a result of use. The surface that is oriented face down exhibited greater wear from grinding. The white marks on the stone's upper surface were created by excavators' tools as they dug. A piece of copper alloy rod (greenish in color, SF 08-53) is visible insitu in soil below the center of the grindstone. Root fragments are seen in the surrounding soil. Photo scale in cm. View looking south. Site Ngre Kataa. 1 July 2008.
Looking eastward over excavation unit 48N 10W toward unit 48N 8W in an area (mound 6) that archaeologists interpret as a metallurgical workshop, a series of anvil/grinding stones have been left in place and a burned feature exposed. Foreground, right, a large anvil stone (GS 09-33) rests atop another stone (GS 09-34). To the right (south), the circular rim of an everted-rim jar has been left in place. To the left (north) is a zone of darker ashy soil flecked with charcoal. Center photo is an anvil stone (GS 09-32), against which a partial elephant tusk--now removed--was found resting. Behind this stone is a tree root and base of a tree stump. The area from this stone (GS 09-32) and extending beyond the stump had been covered with artifacts (clusters B-D, now removed) that archaeologists interpret as a large shrine feature. Some of these artifacts were superimposed directly over the amorphous orange-red burned feature (center photo), which was likely created by high heat associated with forging metals. Other smaller stones have been left in place across the unit. Photo scales marked in 5 cm increments, arrows pointing north. Site Ngre Kataa. 4 July 2009.
An arc of orange-red burned features has been exposed in excavation units 46N 8W and 48N 8W in an area (mound 6) that archaeologists interpret as a metallurgical workshop. To the left (west), the body and base of a large pottery bowl (NK 08-522) has been pedestaled insitu. A number of iron bangles surrounded this bowl (cluster A) as part of a large shrine cluster (A-D) that extended into adjacent units (where the trunk of a small tree is visible, above left of the sign board). The base of this cluster was about 20-30 cm above the burned basins exposed in this photo. The everted rim of a pottery jar visible in the north wall of the excavation unit (top left) was part of an adjacent cluster (B) that also included iron bangles (SF 08-183 & 184). Center photo, flanked by a photo scale, the round rim of a pottery jar is visible in outline. To the right (east) of the burned features, two hammerstones rest insitu next to one another. To the north of the burned features (forward right of the sign board), a zone of white plaster-like sediment is visible. Red and white scale is two meters in length. Arrow pointing north. Site Ngre Kataa. 17 July 2008.
View looking northward of early stage excavations at mound 6, Ngre Kataa, an area that archaeologists interpret as a metallurgical workshop. Center view is of units 42-48N 4W. In foreground, excavations in units 42N 4W and 44N 4W ave exposed clusters of pottery, a grinding stones, tuyeres and an area of burned soil associated with metal working. Foreground, bottom right, are a partial pottery jar (NK 08-520) and to its right (east) a small flat grinding stone (GS 08-12; ). To the left (west), framed by photo scales, is a burned feature. Next to it sits a hand-held hammerstone (GS 08-11). Above (to the north), a cluster of pottery and a partial tuyere (NK 08-284) are visible along the boundary between excavation units (marked by stakes). To the right of that cluster (east), a grinding stone (GS 08-10) has been pedestaled where it was found, resting with its working surface face down. A whole pottery vessel sit at a slightly lower level (NK 08-406) a short distance away (south east). Top center of the photo, at the far end of the excavated area, a cluster of anvil stones is visible (GS 08-05 to 08) in excavation unit 46N 4W. Excavations in the adjacent unit (46N 2W) in 2009 revealed a perforated shrine pot resting at a slightly lower level next to these stones. Photo scale adjacent to burned feature marked in 5 cm intervals. View looking north. Site Ngre Kataa. 5 July 2008.
A small round stone (GS 08-11) rests insitu next to an irregularly shaped area of burned fire-hardened sediment in an area (mound 6) that archaeologists interpret as a metallurgical workshop. The stone has wear consistent with use as a hammerstone. The burned sediment was next to a circular area of soil that showed signs of oxidation through exposure to high heat. A small piece of copper alloy metal lies at the edge of the fire-hardened sediment, to the right (west) of the hammerstone. The feature is likely associated with forging activities. The narrow dark lines in the soil are traces of animal burrowing activity. Photo scale by sign board in cm increments. View from above, arrow pointing north. Site Ngre Kataa. 7 July 2008.
Excavations on the south edge of unit 44N 4W have exposed a cluster of insitu pottery and a tuyere fragment in an area (mound 6) that archaeologists interpret as a metallurgical workshop. Foreground, broken pieces of a pottery jar lie with their exterior surfaces facing down. Behind them and left rests a tuyere fragment (NK 08-284), its circular cross-section visible in front of the sign board. To the right (west) of this cluster is an area of dark reddened soil, one of many examples of burned soil in this area where metals were worked. This diffuse area of reddened soil extended underneath the sherd cluster, center photo. To the right, embedded in the balk behind the north arrow (to its south), the tip of a partial iron point (SF 08-159) is visible (right of the circular patch of dark soil). Photo scale in front marked in cm. Arrow pointing north. Site Ngre Kataa. 10 July 2008.
An arc of orange-red burned features is being revealed by excavations in units 46N 8W and 48N 8W in an area (mound 6) that archaeologists interpret as a metallurgical workshop. To the left (west), the body and base of a large pottery bowl (NK 08-522) has been pedestaled insitu. A number of iron bangles surrounded this bowl (cluster A) as part of a large shrine cluster that extended into adjacent units (where the everted jar rim is visible in the north wall, upper left). The base of this cluster was about 20-30 cm above the burned basins exposed in this photo. To the north of the burned features (forward right of the sign board), a zone of white plaster-like sediment is visible. Far right, archaeologist Abass Iddrisu uses a trowel to expose the contours of burned sediment in an adjacent excavation unit. Red and white scale is two meters in length. Arrow pointing north. Site Ngre Kataa. 16 July 2008.
A boulder used an an anvil stone (GS 09-03) sits insitu, center photo, in an area (mound 6) that archaeologists interpret as a metallurgical workshop. The surface facing the camera is worn flat and smooth from use. Its upper surface shows depressions created by use. Behind this boulder is a flat grinding stone (GS 09-04) with a very worn upper surface. Another boulder (GS 09-02) is visible left (north). Behind it the pedestal base of a pot is visible along the adjacent unit's southern edge. The moistened soil in front of the sign board marked by two orange pin flags marks the find spot of an iron point (SF 09-033). Photo scale along unit edge measures two meters. Arrow pointing north. Site Ngre Kataa. 30 May 2009.