£1.00 – £2.74
This red coloured Marl is a lime ( Calcium Carbonate) rich mudstone from the Triassic of Gloucestershire.
This red coloured marl is from the early Triassic Mercia Mudstone Group, formerly known as the Keuper Marls. It is a calcium carbonate rich mudstone which was laid down under Sahara-like desert conditions. At this time the British Isles was thought to have been about 15 degrees north of the Equator. Oxidised iron compounds give the red colouration. These particular specimens are from around Westbury upon Severn in Gloucestershire. They are supplied in labelled card trays.