Almond Formation | |
Type: | Geological formation |
Period: | Maastrichtian |
Prilithology: | Sandstone |
Otherlithology: | Siltstone, shale, coalb |
Region: | Wyoming |
Country: | United States |
Underlies: | Lewis Shale |
Overlies: | Ericson Formation |
Map: | Southwestern Wyoming Upper Cretaceous Unit cross section.jpg |
The Almond Formation is a geological formation of Late Cretaceous (Late Campanian-Early Maastrichtian[1]) age in Wyoming. It was deposited in marsh, deltaic, lagoonal, estuarine, and shallow marine environments along the western shore of the Western Interior Seaway. It consists primarily of fine- to medium-grained sandstone, siltstone, shale, and coal.[2] Fossils from the Almond Formation include remains of dinosaurs[3] and plants.[4]
Dinosaurs of the Almond Formation | ||||||
---|---|---|---|---|---|---|
Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
Anchiceratops | Indeterminate | Represents a new genus and species of unnamed ceratopsid | ||||
Dromaeosaurus[5] | Indeterminate | |||||
Edmontonia | Indeterminate | |||||
Edmontosaurus | Indeterminate | |||||
Maiasaura | Indeterminate | |||||
Paronychodon | P. lacustris | |||||
Thescelosaurus[6] | Indeterminate | |||||
Unnamed chasmosaurine ceratopsid[7] | Unnamed | Misidentified as Anchiceratops, it is actually a new species of Pentaceratops-like form that is the sister taxon to Bisticeratops.[8] Holotype was discovered in 1937. | ||||