Photograph Notes: The geology wall at the Brandon Marsh nature reserve displays samples of geological formations found in Warwickshire, in chronological order from the late Precambrian period around 600 million years ago to the relatively recent Pleistocene. These rocks date to the late Triassic and Lower & Middle Jurassic, between 200 and 145 million years ago, and were deposited under water around 35 to 40 degrees north. They are found in south and east Warwickshire. White Lias, seen on the left hand side of the photo, is a limestone found southeast of Leamington, around Ufton and Harbury. Blue Lias, in the centre, is formed from mud and lime and occurs around Southam. Hornton stone, to the top right, is a gritty rock that is rich in iron and is found at Edge Hill, where Warwickshire meets Oxfordshire north of Banbury. The plant growing by the wall is green alkanet, Pentaglottis sempervirens.

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Size: 6" x 4" - 150mm x 100mm

Copyright (Photograph and text in Photograph Notes): � Copyright Alan Paxton and licensed for reuse under creativecommons.org/licenses/by-sa/2.0 details available here: https://creativecommons.org/licenses/by-sa/2.0/

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