Grès supérieurs Formation
Geological formation in Laos
From Wikipedia, the free encyclopedia
The Grès supérieurs Formation (French for "Upper sandstone") is a geological formation in Laos whose strata date back to the Aptian to Albian stages of the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.[1] It is equivalent to the Khok Kruat Formation of Thailand.
Unit ofIndosinias Group, equivalent with units of Khorat Group
OtherSiltstone
| Grès supérieurs Formation | |
|---|---|
| Stratigraphic range: Aptian-Albian ~ | |
| Type | Geological formation |
| Unit of | Indosinias Group, equivalent with units of Khorat Group |
| Lithology | |
| Primary | Sandstone, mudstone |
| Other | Siltstone |
| Location | |
| Coordinates | 17.0°N 106.0°E |
| Approximate paleocoordinates | 18.0°N 112.6°E |
| Region | Savannakhet Province |
| Country | Laos |
| Extent | Savannakhet Basin |
| Type section | |
| Named for | "Upper sandstone" |
  Grès supérieurs Formation (Laos) | |
Fossil content
The Grès supérieurs Formation has also yielded remains of indeterminate iguanodontians, as well as ornithopod and sauropod tracks.
Fish
| Fish | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Lanxangichthys | L. alticephalus | A three-dimensionally preserved skull | A basal lepisosteiform[2] | |||
Turtle
Dinosaurs
| Dinosaurs | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Euhelopodidae Indet.[4] | Indeterminate | |||||
| Mandschurosaurus | M. laosensis | An indeterminate iguanodontian[1] | ||||
| Tangvayosaurus | T. hoffeti | "[Two] partial postcranial skeletons."[5] | A sauropod[1] |  | ||
| Titanosaurus | T. falloti | An indeterminate sauropod possibly referable to Tangvayosaurus[1] | ||||
| Ichthyovenator | I. laosensis | An incomplete skeleton[5] | A spinosaurid[1] |  | ||
Color key
|
Notes Uncertain or tentative taxa are in small text; |
- Other fossils