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Geological formation in England From Wikipedia, the free encyclopedia
The Westbury Formation is a geological formation in England, one of the Penarth Group. It dates back to the Rhaetian.[1] The formation is named after the village of Westbury-on-Severn in Gloucestershire.[2] The remains of a giant shastasaurid and dinosaurs are known from the formation.[3][4]
Westbury Formation | |
---|---|
Stratigraphic range: | |
Type | Geological formation |
Unit of | Penarth Group |
Underlies | Lilstock Formation |
Overlies | Blue Anchor Formation |
Thickness | 5-10 m |
Lithology | |
Primary | Mudstone, Shale |
Other | Limestone, Sandstone |
Location | |
Region | Europe |
Country | UK |
Type section | |
Named for | Westbury-on-Severn |
Vertebrates reported from the Westbury Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
Avalonianus[5] | A. sanfordi[5] | Wedmore Hill[5] | "Several now lost teeth."[5] | |||
C. borealis[1] |
Westbury-on-Severn[6] |
"Vertebrae, pubis, ischium, femur, tibia, phalanges, adult."[7] |
||||
Ichthyotitan[4] | I. severnensis[4] | Blue Anchor and Lilstock[4] | Two partial surangulars[3] | Possibly one of the largest marine reptiles | ||
Picrodon[5] | P. herveyi[5] | Wedmore Hill[5] | "Tooth."[5] | |||
Shastasauridae[3] | Indeterminate[3] | Aust[3] | "Three partial specimens."[3] | |||
Pachystropheus[8] | Several partial postcranial skeletons | A small thalattosaurian marine reptile, youngest known thalattosaur | ||||
Lissodus[8] | L. minimus | A hybodont shark | ||||
Saurichthys[8] | A pike or gar-like predatory fish | |||||
Sargodon[8] | A dapediiform fish | |||||
Gyrolepis[8] | A ray-finned fish | |||||
Birgeria[8] | A large predatory fish | |||||
Ceratodus[8] | A lungfish | |||||
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