| Lastres Formation | |
|---|---|
| Stratigraphic range: Kimmeridgian-Tithonian | |
| Type | Geologic group |
| Overlies | Tereñes Formation |
| Thickness | 400 meters |
| Lithology | |
| Primary | Sandstone, conglomerate |
| Other | Mudstone |
| Location | |
| Coordinates | 43°30′N 5°30′W / 43.5°N 5.5°W |
| Approximate paleocoordinates | 35°48′N 6°48′E / 35.8°N 6.8°E |
| Region | Asturias |
| Country | Spain |
The Lastres Formation is a geological formation located in Asturias province, northwestern Spain. It is believed to have been deposited in a fluvial-dominated deltaic system.
Fossil tracks have been reported from the formation, including those of dinosaurs, pterosaurs, crocodiles, turtles, and lizards. One notable track is a giant stegosaur footprint 57 centimetres (1.87 ft) in length.
Color key
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Notes
Uncertain or tentative taxa are in small text
crossed out taxa are discredited.
| Pterosaurs | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Notes | Images | |
| Pteraichnus | * Present at the Quintueles, Oles, Tazones, and Luces sites; all in Asturias, Spain. | * Quintueles, Oles, and Tazones specimens housed at the Jurassic Museum of Asturias, Spain. Luces specimens remain in the field. | |||
| Plants | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Ricciopsis | R. asturicus | A liverwort. | |||