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Grimes Graves

Neolithic flint mine in Norfolk — 433 shafts sunk into the chalk for axe flint.

Dated events and their evidence

• 2,600 BCE mainstream
  worked c.2600-2300 BCE; at least 433 shafts up to 14 m deep source

Where

52.4759° N, 0.6754° E

Sources

• https://en.wikipedia.org/wiki/Grimes_Graves

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