Photo of a pottery jar with a slightly everted rim (NK 08-406), found insitu in an area that archaeologists interpret as a metallurgical workshop. Above its rounded shoulder, the jar's surface is undecorated, with the possible exception of traces of red pigment in some areas. The jar's shoulder is decorated with a band of circular punctates interspersed with cross-hatched designs, repeated twice around the jar's circumference. Its base and lower body are surface treated with cord roulette in a zone bounded by a band of diagonal impressions which create a zigzag design ("/\/\"). The jar is fire-clouded in zones across its surface. The jar was found in the vicinty of a grinding stone (GS 08-10), a partial tuyere (NK 08-284) and a burned feature. Rim diameter at exterior lip: 20 cm. Vessel height: 19 cm. Site Ngre Kataa. 15 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 iron bangle (SF 08-140) made by coiling a round iron rod with thinned pointed ends. The bangle was found in association with pottery, other bangles and artifacts (cluster A). Archaeologists interpret this context as part of a larger shrine feature (clusters A-D) that capped a metallurgical workshop. The bangle shows signs of corrosion by rusting. Scale in cm. Width: 8.8 cm. Weight: 40 g. Site Ngre Kataa. 9 July 2008.
An iron bangle (SF 08-139) made by coiling a flat iron rod. One end is pointed, the other squared. The bangle was found in association with pottery, other bangles and artifacts (cluster A). Archaeologists interpret this context as part of a larger shrine feature (clusters A-D) that capped a metallurgical workshop. The bangle shows signs of corrosion by rusting. Scale in cm. Width: 6.1 cm. Weight: 21.3 g. Site Ngre Kataa. 9 July 2008.
An iron bangle (SF 08-169) made from a round iron rod that has been spiral-twisted. The bangle's ends are flattened and overlap slightly. The bangle was found in association with pottery, other bangles and artifacts (cluster A). Archaeologists interpret this context as part of a larger shrine feature (clusters A-D) that capped a metallurgical workshop. The bangle shows signs of corrosion by rusting. Scale in cm. Width: 9.1 cm. Weight: 96.8 g. Site Ngre Kataa. 14 July 2008.
A triangular-headed iron projectile point (SF 08-112a) exposed insitu in an area (mound 6) that archaeologists interpret as a metallurgical workshop. The point's long tang (left) is bent in a way that made it unusable. The soil around the point has been moistened by excavators to facilitate excavation. The point was found in the vicinity of burned features and anvil stones. Photo scale in cm. View looking south. Site Ngre Kataa. 7 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.
A small piece of slag (top) and a copper alloy ( brass) rod fragment (bottom, SF 08-053). The greenish hue of the rod is a product of weathering. These artifacts were found next to one another in unit 48N 4W in an area (mound 6) that archaeologists interpret as a metallurgical workshop. They were found adjacent to and below a large grinding stone (GS 08-04). Site Ngre Kataa. 1 July 2008.
An iron bangle (SF 08-184) made by coiling a flattened iron rod, its ends rounded and overlapping. The bangle was found in association with a concentration of artifacts, including pottery, other iron bangles, a dog skull and jaw bones (cluster B), that archaeologists interpret as part of a larger shrine feature (clusters A-D). This feature capped stratigraphic layers in a metallurgical workshop (mound 6). The bangle shows signs of corrosion by rusting. Scale in cm. Width: 6.9 cm. Weight: 39.2 g. Site Ngre Kataa. 15 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 (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 iron"bangle" (SF 09-173) made from a flattened iron rod with rounded ends. The bangle is open on one side (1/2 circle). The bangle was found as part of a carefully laid set of objects that included an iron disc (SF 09-172) and iron spike (SF 09-174) among other artifacts (cluster B). Archaeologists interpret this context as part of a larger shrine feature (clusters A-D) in a metallurgical workshop. The bangle shows signs of corrosion by rusting. Scale in cm. Width: 5 cm. Weight: 10 g. Site Ngre Kataa. 10 June 2009.
An iron bangle (SF 09-148) made from a round iron rod that has been spiral-twisted. Its ends overlap and are rounded. The bangle was found placed on the inside surface of a pottery jar resting next to a pair of miniature iron manacles (SF 09-171), around which were other pottery rims and lids (cluster C). Archaeologists interpret this context as part of a larger shrine feature (clusters A-D) in a metallurgical workshop. The bangle shows signs of corrosion by rusting. Scale in cm. Width: 8.1 cm. Weight: 89.9 g. Site Ngre Kataa. 9 June 2009.
A tri-looped iron bangle (SF 09-218) made from a continuous round iron rod. A detail of the triple loop is shown, right. The bangle ends are thickened and held together by a wire clasp. The bangle was found beneath a cluster (cluster C) of pottery, which archaeologists interpret as part of a larger shrine feature (clusters A-D) in a metallurgical workshop. It rested in soil about 10 cm below a pedestal-handled pottery lid (NK 09-381) that was part of cluster C. The bangle shows signs of corrosion by rusting. Scale in cm. Width: 10.8 cm. Weight: 26.3 g. Site Ngre Kataa. 16 June 2009.
Two views of a large iron spike (SF 09-174) found as part of a carefully laid set of objects that included an iron disc (SF 09-172) and an iron bangle (SF 09-173), among other artifacts (cluster B). Archaeologists interpret this context as part of a larger shrine feature (clusters A-D) in a metallurgical workshop. One side of the spike (lower image) is rounded in profile. On the opposite side (upper image), the spike has been flattened (right side) and its edges curved inward, perhaps to form a casing for a haft. The spike shows signs of corrosion by rusting. Scale in cm. Length: 16.5 cm. Weight: 52.3 g. Site Ngre Kataa. 10 June 2009.
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.
A vertical bank of orange-colored fire-hardened soil abuts a cluster of stones in what archaeologists interpret as a forge feature in a metallurgical workshop. The furnace feature occupied the northwest corner of the excavation unit. In the southern haf of the 2x2 m unit were large boulders used as anvil/grinding stones (GS 09-01 and 09-02). A tree root is visible along the base of the unit's western wall (left). Photo scale by burned feature marked in cm. Arrow pointing north. Site Ngre Kataa. 1 June 2009.
A group of insitu artifacts interpreted by archaeologists as a shrine cluster, located in a metallurgical workshop (mound 6). The cluster included a partial everted-jar rim (center), in front of which (north) was a carefully placed group of iron objects, including a flattened iron disc (SF 09-172) standing on edge, a long spike (SF 09-174) positioned horizontally, on top of which rested a half bangle (SF 09-173). To the right (west) of the jar rim is another iron bangle (SF 90-170). These objects are surrounded by broken pieces of pottery. This cluster (B, 8-10) was part of a larger grouping of objects (clusters A-D) that archaeologists interpret as a shrine feature that capped a metallurgical workshop. View looking south. Photo scale marked in 5 cm increments. Site Ngre Kataa. 10 June 2009.
A group of insitu artifacts interpreted by archaeologists as a shrine cluster, located in a metallurgical workshop (mound 6). The cluster included a partial everted-jar rim (upper right), in front of which (north) was a carefully placed group of iron objects, including a flattened iron disc (SF 09-172) standing on edge, a long spike (SF 09-174) positioned horizontally, on top of which rested a half bangle (SF 09-173). To the right (west) of the jar rim is another iron bangle (SF 90-170). To the right of this, surrounded by moistened soil, the edge of a large grinding stone (GS 09-32) is visible. Surrounding these objects are broken pieces of pottery. This cluster (B, 8-10) was part of a larger grouping of objects (clusters A-D) that archaeologists interpret as a shrine feature that capped a metallurgical workshop. Arrow pointing north, view from above. Photo scale marked in 5 cm increments. Site Ngre Kataa. 10 June 2009.
A slightly curved iron disc (SF 09-172). It was found positioned upright among a carefully placed set of objects in what archaeologists interpret as a shrine feature in a metallurgical workshop. A large iron spike (SF 09-174) and an iron bangle (SF 09-173) sat next to it. The disc shows signs of corrosion by rusting. Its function is unknown, though it may be a tool preform. The disc shows signs of corrosion by rusting. Scale in cm. Width: 10.7 cm. Weight: 89.8 g. Site Ngre Kataa. 10 June 2009.
Archaeologist Ben Nutor uses a trowel to scrape soil from around a cluster of objects that archaeologists interpret as a shrine feature (cluster A) in a metallurgical workshop (mound 6). An orange flag marks the location of an iron bangle (SF 08-140), the first of four that were found surrounding the large pottery bowl (NK 08-522) seen partially exposed in front of Nutor. An iron headpan used to carry dirt for screening sits nearby. Site Ngre Kataa. 9 July 2008.