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Local Name(s): | Purbeck Stone - Thornback. | ||||||
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Stone Group: | Sedimentary | ||||||
Stone Type: | Limestone | ||||||
Geology: |
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Geological Sub-Divisons: | Middle Purbeck Division of the Upper Jurassic. |
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General Colour Description: | A cream to grey/buff colour with large fragments of darker grey shell. |
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Hand Specimen Description: | A hard, poorly sorted, coarse textured, bioclastic limestone. There are several types of Purbeck Thornback, which differ slightly in colour and number of shells. |
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Stone Identifiers: | Calcareous,  Fossiliferous. | ||||||
Reacts dilute to HCl? | Yes |