Fox Hills Formation
E364205
The Fox Hills Formation is a Late Cretaceous geologic unit in the Western Interior of North America, known for its marine to marginal-marine sandstones that record the final retreat of the Western Interior Seaway.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fox Hills Formation canonical | 1 |
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Late Cretaceous formation
ⓘ
geologic formation ⓘ stratigraphic unit ⓘ |
| chronostratigraphicPosition | Maastrichtian ⓘ |
| contains |
ammonite fossils
ⓘ
bivalve fossils ⓘ marine invertebrate fossils ⓘ plant fossils ⓘ trace fossils ⓘ vertebrate fossils ⓘ |
| depositionalSetting |
barrier-island complex
ⓘ
nearshore marine ⓘ regressive shoreline system ⓘ |
| economicImportance |
groundwater aquifer in some regions
ⓘ
hydrocarbon reservoir in some basins ⓘ |
| environmentOfDeposition |
deltaic
ⓘ
marginal-marine ⓘ marine ⓘ shoreface ⓘ |
| exposedIn |
Colorado
ⓘ
Montana ⓘ North Dakota ⓘ South Dakota ⓘ Wyoming ⓘ |
| geologicAge | Late Cretaceous ⓘ |
| hasStratigraphicThickness | commonly tens to several hundreds of meters ⓘ |
| lithology |
sandstone
ⓘ
shale ⓘ siltstone ⓘ |
| locatedIn |
Canada
ⓘ
North America ⓘ United States of America ⓘ
surface form:
United States
|
| namedFor | Fox Hills, South Dakota ⓘ |
| overlies | Pierre Shale ⓘ |
| paleogeographicSignificance |
marks transition from marine to continental deposition in Western Interior
ⓘ
records regression of Western Interior Seaway ⓘ |
| partOf | Western Interior Basin ⓘ |
| records | final retreat of the Western Interior Seaway ⓘ |
| researchUse | study of Cretaceous–Paleogene transition environments ⓘ |
| stratigraphicGroup |
Colorado Group
ⓘ
Montana Group ⓘ varies regionally ⓘ |
| underlies |
Frenchman Formation
ⓘ
Hell Creek Formation ⓘ Lance Formation ⓘ Laramie Formation ⓘ Medicine Hat Formation ⓘ Scollard Formation ⓘ Williston Basin ⓘ
surface form:
Williston Basin Paleocene units
|
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.