Unit M25

image M25-03


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Muddy limestone showing burrows of various types. The clear polygonal burrow system (Thalassinoides) was produced by a crustacean similar to the modern ghost shrimp. It cuts across earlier, smaller burrows. Overall, the soft sediment was intensely bioturbated, destroying original sedimentary structures.

Scale: Coin is 25mm in diameter

Grid reference: 987 315

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