Geology Superstore
Geology Superstore

Crinoidal Limestone

Lower Carboniferous crinoidal limestone from Derbyshire, U.K.

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This pale buff grey limestone was laid down about 300 Ma during the Lower Carboniferous in a shallow marine setting. The fossil crinoids belong to the sea lily family & like all echinodermata have 5 arms. Locally they are referred to as the “Derbyshire Screws” because of their appearance. Bivalves, brachiopods & corals are sometimes to be found along with the crinoids. This rock is classed as one of the “British Marbles” ,although obviously not metamorphic, as it makes an excellent monumental stone that can polished. Specimens are supplied in labelled card trays.

Weight 120 g
Specimen Size

2" x 2", 3" x 2", 4" x 3"

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SKU: SEDROK020 Category:
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