the village of Nok, southern Kaduna, Nigeria
Nok terracottas
Main phase, 9th to 4th century BC (iron and the figures arrive together, and the start of that iron is still argued)
In 1928 a tin mine near the village of Nok turned up a clay head seven metres down. Fifteen years later another head spent a year as a scarecrow in a yam field before anyone recognised the match. The figures are hollow, and in the same centuries the sites start to show iron.
Why this is extraordinary
A tin miner near the village of Nok, in southern Kaduna, brought up a clay head in 1928. It had been about seven metres down in the alluvium. In 1943 another head from the same country was stuck in a yam field as a scarecrow and did that job for a year before the resemblance was noticed. The mines were eating the sites. What came out of them, and out of later digs, is a family of hollow terracotta figures. They are coil-built from coarse, gravelly clay, opened at the eyes and the mouth so the walls can dry, then slipped and burnished. The hair is where the maker spent the time. Bodies survive less often than heads, because the finds are usually broken, rolled in stream beds, or dug out of place.
The chronology from the project that started in 2005 has three steps. An early phase begins around the middle of the second millennium BC, with pottery and without the famous figures. The main phase runs from the 9th century BC to the 4th, and that is when both the terracotta and the iron become common. A thinner phase lasts into the last centuries BC, and by the turn of the Common Era the pots and the figures have stopped. Settlements stay small. Houses were wood and thatch. The project could defend ritual complexity, not towns or palaces. And the ground has been ransacked. In the research area, more than 90 percent of the known sites had already been looted. A beautiful head in a museum can be filed anywhere from the 6th century BC to the 4th century AD, because the layer is gone.
The iron is the sharp edge of the date. At Taruga in 1961, slag, tuyères, and furnace bases lay with figurine fragments. Charcoal was reported as 2230 ± 120 radiocarbon years and printed as 280 BC, which is the uncalibrated subtraction, not a calendar year you can trust to a decade. A fresher stick gave AD 206 ± 50. Furnaces dug since 2005 cluster in the middle of the first millennium BC, with bases about a metre wide over slag pits. So how old is the first iron? The main phase starts in the 9th century BC, which is early south of the Sahara. One reading is a local invention. Another is a technique that arrived from the north or the northeast and only becomes visible then. The catch is the wood. Charcoal dates the tree, and a tree can be centuries older than the furnace. What this changes: if the early furnaces hold, West Africa is smelting while many textbooks still had the skill waiting to come down from the Nile. If the charcoal is old wood, the figures remain, and the iron slides later inside the same culture. No star alignment or solstice line has been published for the sculptures, and none is added here. Ancestors, grave markers, charms, and roof finials are the uses already proposed for the figures. A rite can be serious without a house aimed at the sun, and almost no house plan survives to measure. The iron and the looting are the argument. The sky is not.
Why it matters
If the iron was invented here, sub-Saharan Africa has its own early smelting, not only a skill learned from the north. If the iron arrived from outside, the terracottas are still the oldest large figurative sculpture yet excavated in West Africa, and the date of that arrival is the fight.
The culture is named for the Ham village of Nok in southern Kaduna. The sculptures are hollow terracotta, coil-built from coarse clay, with openings so a thick figure can dry and survive the fire. Slip and burnish give a smooth face. Hair is the most careful part. Eyes, nostrils, and mouths are often pierced. Most finds are fragments, rolled in stream deposits or pulled out of pits by miners and, later, by looters. A whole body is rare. What the figures were for is not settled. Ancestors, grave markers, charms, and finials on roofs have all been suggested. Dome-shaped bases on some of them would sit on a post or a roof. A research project that ran from 2005 found the settlements small, houses of wood and thatch that leave almost no trace, and no towns. The complexity it could defend was ritual.
Photo tour
2 photographs, unedited. On a phone, swipe the row. Choose one to look closely.
- No openly licensed photograph of a Taruga furnace in the ground was found. The iron stays in the text. The heads are museum pieces, and their labels are wider than a trench date.
What is still unexplained
These sit beside the consensus account, with the same visual weight. None of them is marked solved.
Location and dating
- Location
- The type finds are from the village of Nok in southern Kaduna. The coordinate is the published point for that village, 9.5 degrees north and 8 degrees east, not a single trench. Taruga, where the furnaces were dug, lies to the southeast, near Abuja. The culture’s sites are scattered across the region, on hilltops and gentle slopes.
- Period label
- Current consensus — open to revision Early phase from the middle of the second millennium BC. Main phase, with figures and iron, from the 9th century BC to the 4th. A thin later phase into the last centuries BC. The end, on the pottery, is around the turn of the Common Era.
- How this dating was done
- Radiocarbon on charcoal and on organic material in the layers, set against the pottery sequence. Thermoluminescence has also been used on the clay of figures from older excavations. A head in a museum, without a layer, is dated by style, which is why those labels are wide.
- What could change it
- A furnace dated on a short-lived twig from inside the slag, rather than on charcoal that might be old heartwood, would pin the first iron. A whole figure in a sealed grave, with that same twig, would pin the sculpture to the same fire.
What is actually there
- The first published head came from a tin mine in 1928, about seven metres down.
- Figures are hollow, coil-built, and usually found in fragments.
- The main phase, 9th to 4th century BC, is when figures and iron both become common.
- Taruga’s charcoal was printed as 280 BC from 2230 ± 120 radiocarbon years, without calibration.
- Newer furnaces cluster in the middle of the first millennium BC, with bases about a metre across.
- More than 90 percent of known sites in the research area have been looted.
Open questions
| Question | Status |
|---|---|
| Was iron smelted here before it was learned from somewhere else? | Open. The 9th-century start is early. Charcoal can be older than the fire. |
| What were the heads for? | Open. Graves, ancestors, charms, and roof finials all fit fragments. Few figures have been dug in a sealed grave. |
The current narrative
Where publication stands today. It is the best-supported reading, and it is open to revision. It is not a verdict.
The current narrative — open to revision
Iron and the figures, invented together
From the 9th century BC the Nok sites have both the terracotta sculpture and iron smelting, and the smelting is early enough, and local enough in its furnaces, to be treated as a West African development rather than a late import.
What supports this
- The project chronology puts figures and iron in the same main phase, 9th to 4th century BC, after an earlier phase that has neither as its signature.
- Excavated furnaces share a pattern. Bases about a metre across sit over slag pits, and the dates cluster in the middle of the first millennium BC.
- The figures are a coherent craft, hollow and coil-built, across a wide scatter of small settlements. Whatever the iron was, the sculpture is not a copy of a northern school that has been dug.
What pushes back
- Charcoal dates the tree. A very early iron claim can be old wood in a younger furnace.
- Taruga’s mix of furnace types, and a modern pipe on that valley, shows that one site can be used again. A single 280 BC printing is not a birthday.
- “Invented here” is harder to show than “present here.” A skill can arrive without the travellers leaving a foreign pot.
What would settle it
It is the centre for the main-phase date and for the furnaces as they were dug. The word “invented” is the part a northern origin can still move, without moving the terracottas.
Emerging narratives
Other published readings. Each may be right. None is adopted here unless the evidence carries it.
An emerging narrative
The figures are local, and the iron came in
The sculpture is a central Nigerian craft. The smelting was learned from the north or the northeast, and the 9th century BC is when that knowledge becomes visible in these layers, not when it was thought up beside the village of Nok.
What supports this
- Iron is older still in North Africa and the Nile valley. A gap of centuries is enough time for a technique to travel.
- The early Nok phase, from the middle of the second millennium BC, has the pottery and not the iron. The metal arrives in an already settled tradition.
- Looted figures cannot be used to push the iron earlier. Only furnaces in the ground can, and those cluster later than the first century of the main phase.
What pushes back
- No foreign furnace kit has been dug that would mark an incoming school. The metre-wide slag-pit bases repeat locally.
- Arrival and invention can leave the same slag. Absence of a northern pot is not proof of invention, and presence of slag is not proof of arrival.
- The sculpture does not depend on the iron story. The heads are the same either way.
What would settle it
A coherent way to keep the early date without a local invention. It needs a trail of furnaces or tools between the Sahara and Taruga, which these trenches have not supplied.
Should the current view be reevaluated?
Open to revision
The figures and a main phase that includes iron are secure enough to teach. Whether that iron was invented on the spot or learned is not settled, because charcoal can pre-date the fire and the settlements are too looted for a clean first furnace. Open keeps both readings.
What drives this
- Hollow terracotta from the 9th century BC, usually fragments, often without a trench.
- Furnaces in the middle of the first millennium BC, bases about a metre across.
- A 9th-century start that is early for iron south of the Sahara, and a charcoal clock that can run old.
This is the museum’s own weighing of the evidence. It is not a visitor vote, and it is separate from the slider.
Weigh it yourself
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Visitor lean so far — not evidence. On this browser only; a shared tally is not collected.
If the contested reading is right
What would follow if a reading that is not the consensus turned out to be true, and what could settle it. This explains the stakes. It does not adopt the reading.
Iron smelting began here in the early first millennium BC
Maps that bring all sub-Saharan iron down from the Nile or the Mediterranean in the later first millennium BC would have to start earlier, and in central Nigeria. The heads would be the art of that same phase.
Why it is still worth a test
Short-lived twigs inside slag, from a furnace sealed under the main-phase pottery, dated beside a figure in the same layer.
Sources
- A chronology of the central Nigerian Nok culture, 1500 BC to the beginning of the Common Era Journal of African Archaeology, 2016
- Nok early iron production in central Nigeria Journal of African Archaeology, 2016
- Radiocarbon dating of the Nok culture Africa, the Taruga note of 2230 ± 120 radiocarbon years
Image credits
- A Nok head in the Honolulu Museum of Art. The museum’s label runs from the 5th century BC to the 4th century AD, wider than the excavated main phase. The coiffure is built up, the eyes are cut through, and the clay is coarse. . Hiart, CC0 1.0. Shown unedited.
- A male head in the Brooklyn Museum, labeled about 550 to 50 BC, from Kaduna, Plateau, or Nasarawa. The neck is broken. Eyes and mouth are opened through the clay. No trench comes with it. . Daderot, CC0 1.0. Shown unedited.