Dansirit Formation
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| Dansirit Formation | |
|---|---|
| Stratigraphic range: Aalenian-Bajocian ~ | |
| Type | Geological formation |
| Unit of | Shemshak Group |
| Underlies | Dalichai Formation |
| Overlies | Fillzamin & Shirindasht Formations |
| Thickness | over 200 metres (660 ft) |
| Lithology | |
| Primary | Sandstone |
| Other | Shale, siltstone, Coal |
| Location | |
| Coordinates | 36°12′N 51°42′E / 36.2°N 51.7°E |
| Approximate paleocoordinates | 29°06′N 59°48′E / 29.1°N 59.8°E |
| Region | Mazandaran |
| Country | Iran |
| Extent | Alborz Mountains |
  Dansirit Formation (Iran) | |
The Dansirit Formation is a geological formation in Iran. It is Middle Jurassic in age, dating from the Aalenian to Bajocian.
The fossils of Dansirit Formation mainly include plant fossils and dinosaur footprints[1][2][3]
Plant fossils
Plant fossils of the Dansirit Formation mostly include Filicales, Bennettitales, Cycadales, Corystospermales, Caytoniales, Czekanowskiales, Ginkgoales and Pinales. Filicophyta, Coniferales, Bennetitales and Equisetales dominate the flora, which indicates the deposition of this formation in relatively tropical and rainy environments in islands, deltas and river banks.[1][4]
Dinosaur footprints
The dinosaur footprints of this formation in Mazandaran province include theropods with an average length of about 2 meters, small two-toed Deinonychosaurs, relatively giant sauropods about 9 meters long, and small two-legged ornithopods. These works are limited to footprints and dinosaur fossils have not been reported in this formation.[3][2]