Tag: Mercia Mudstone

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Aust cliff

The striking red and white cliffs at Aust, on the Severn Estuary, expose the Rhaetian Penarth Group, home to one of the most famous bone beds in the UK. This thin but highly productive layer is packed with teeth, fish remains and reptile material, making Aust the richest Triassic fossil site in Britain. Under the right conditions, the foreshore can yield a wide variety of microfossils, rewarding careful searching and sieving. Triassic, Jurassic, Cliffs and Foreshore, Rating: ♦♦♦♦♦
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Helwell Bay (Doniford)

Helwell Bay at Doniford is one of the best locations in Somerset for collecting iridescent ammonites, a highlight of the Blue Lias. The extensive foreshore also yields small white ammonites, reptile bones and a variety of bivalves, often exposed after erosion, making it a highly rewarding site for collectors. Classic Helwell Bay finds include the early Jurassic ammonites Psiloceras planorbis and Caloceras johnstoniJurassic, Cliffs and Foreshore, Rating: ♦♦♦♦
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