£1.38 – £3.46 ex VAT
Oolitic Limestone. Jurassic (Oxfordian) in age from the Malton Oolite & Coral Rag member. Generally much harder than the oolitic example from Gloucestershire. Specimens available in a variety of sizes.
Oolitic limestone is a carbonate rock made up mostly of ooliths (or ooids) which are sand-sized carbonate particles (0.25 -2.0mm) built up of concentric shells of precipitated calcium carbonate CaCO3. These layers were formed around grains of sand or shell fragments that were rolled around on a shallow sub tropical sea floor, gathering layer after layer of carbonate. This pale grey limestone is from the Malton Oolite & Coral Rag (Oxfordian) member of the Jurassic outcrops around Pickering in Yorkshire. Examples may also locally contain abundant shell fragments. Specimens are provide with a labelled card tray.
2" x 2", 3" x 2", 4" x 3"
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