Stone in Archaeology Database


Purbeck Grub

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Local Name(s): Purbeck Grub. Example of Purbeck Grub
Stone Group: Sedimentary
Stone Type: Limestone
Geology:
Era:   Mesozoic
Period:   Jurassic
Epoch:   Upper
Geological Sub-Divisons:

Middle Purbeck division of Upper Jurassic.

General Colour Description:

This stone varies in colour but on the whole it is a bluish grey colour with numerous pieces of grey and occasionally buff coloured shell.

Hand Specimen Description:

A very hard, coarse grained, poorly sorted, bioclastic limestone.

Stone Identifiers: Calcareous,  Fossiliferous.
Reacts dilute to HCl? Yes