Almond Formation | |
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Stratigraphic range: | |
Type | Geological formation |
Underlies | Lewis Shale |
Overlies | Ericson Formation |
Lithology | |
Primary | Sandstone |
Other | Siltstone, shale, coalb |
Location | |
Coordinates | 41°36′25″N 109°13′34″W / 41.60694°N 109.22611°W |
Region | Wyoming |
Country | United States |
Southwestern Wyoming, incl. Almond formation |
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]
Color key
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Notes Uncertain or tentative taxa are in small text; |
Dinosaurs of the Almond Formation | ||||||
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Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
Indeterminate |
Represents a new genus and species of unnamed ceratopsid |
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Indeterminate[5] |
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Indeterminate[5] |
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Indeterminate[5] |
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Indeterminate[5] |
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P. lacustris[5] |
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Indeterminate[6] |
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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. |