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COPROLITE WORKINGS |
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| UF |
Coprolite Working Site |
| SN | An open pit from which coprolites or phosphatic nodules were extracted. Commonly found in the Fens and East Anglia coprolites were ground up and used as fertilizer. |
| CL |
INDUSTRIAL |
| BT | MINERAL EXTRACTION SITE |
| RT |
FERTILIZER WORKS
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