| Scunthorpe Mudstone | |
|---|---|
| Stratigraphic range: Rhaetian-Hettangian ~ | |
| Type | Formation |
| Unit of | Lias Group |
| Sub-units | Barnstone Member |
| Underlies | Charmouth Mudstone Formation |
| Overlies | Lilstock Formation |
| Thickness | Up to 128 m |
| Lithology | |
| Primary | Mudstone |
| Other | Limestone, Siltstone |
| Location | |
| Coordinates | 52°54′N1°00′W / 52.9°N 1.0°W |
| Approximate paleocoordinates | 38°00′N1°18′E / 38.0°N 1.3°E |
| Region | England |
| Country | United Kingdom |
| Extent | East Midlands Shelf Leicester to Market Weighton |
| Type section | |
| Named for | Scunthorpe |
| Location | Blyborough Borehole, Blyborough, Lincolnshire |
  Scunthorpe Mudstone (the United Kingdom)  Scunthorpe Mudstone (England) | |
The Scunthorpe Mudstone is a geologic formation in England. It preserves plesiosaur fossils dating back to the Late Triassic (Rhaetian) to Early Jurassic (Hettangian) period. [1] It predominantly consists of grey mudstone with thin beds of argillaceous limestone and calcareous siltstone. [2] The Ichthyosaur Wahlisaurus is known from the formation. [3] As is the holotype specimen of the dinosaur Sarcosaurus . [4]
