| Lilstock Formation | |
|---|---|
| Stratigraphic range: Rhaetian ~ | |
| Type | Formation |
| Unit of | Penarth Group |
| Sub-units | Cotham Member, Langport Member |
| Underlies | Blue Lias Formation, Scunthorpe Mudstone Redcar Mudstone Formation |
| Overlies | Westbury Formation |
| Thickness | 1–10 m (3.3–32.8 ft) |
| Lithology | |
| Primary | Shale, siltstone, limestone, mudstone |
| Location | |
| Coordinates | 51°12′N 3°18′W / 51.2°N 3.3°W |
| Approximate paleocoordinates | 35°30′N 0°30′E / 35.5°N 0.5°E |
| Region | England |
| Country |  United Kingdom |
| Type section | |
| Named for | Lilstock |
  Lilstock Formation (the United Kingdom)  Lilstock Formation (England) | |
The Lilstock Formation is a geologic formation in England. It preserves bivalve, insect and other invertebrate fossils, as well as fossil fish of Agkistracanthus mitgelensis and the basal theropod dinosaur Newtonsaurus cambrensis dating back to the Rhaetian of the Triassic period.[1][2]
- ^ Lilstock Formation at Fossilworks.org
- ^ Galton PM. Bones of large dinosaurs (Prosauropoda and Stegosauria) from the Rhaetic Bone Bed (Upper Triassic) of Aust Cliff, southwest England. Revue de Paléobiologie, Genève. 2005; 24:51–74.