These pictures show details of the colour, texture, and patterns in vertical and horizontal exposures of the rocks of the Ringstead Clay Member (also known as the Ringstead Waxy Clays) at Ringstead Bay in Dorset, England. This is in the upper part of the Corallian Formation belonging to the Jurassic Period. It comprises four different layers or strata that reach a combined thickness of up to 5 metres. The clay deposits contain bands of reddish-brown, siderite nodules (iron carbonate) that are responsible for the rusty or ferruginous colouration of the otherwise brown and grey clay. There are interesting patterns of cracks where the clay is drying out; and changes of colour tone according to the moisture content of the clay. The most obvious fossils in this particular clay group are the large, flat, almost triangular, oysters – Deltoideum (Liostrea) delta.
COPYRIGHT JESSICA WINDER 2014
All Rights Reserved