Morrison Formation
E52675
The Morrison Formation is a vast Late Jurassic sedimentary rock formation in the western United States renowned for its exceptionally rich assemblage of dinosaur fossils, including iconic sauropods and theropods.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Morrison Formation canonical | 29 |
| Brushy Basin Member of the Morrison Formation | 1 |
| Morrison Formation dinosaur-bearing beds | 1 |
| Morrison Formation, western United States | 1 |
| Upper Morrison Formation | 1 |
Statements (55)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
sedimentary rock formation ⓘ stratigraphic unit ⓘ |
| containsFossilGroup |
bivalves
ⓘ
charophytes ⓘ crocodyliforms ⓘ early mammals ⓘ gastropods ⓘ ornithopod dinosaurs ⓘ ostracods ⓘ pollen and spores ⓘ sauropod dinosaurs ⓘ stegosaurian dinosaurs ⓘ theropod dinosaurs ⓘ turtles ⓘ |
| containsFossilTaxon |
Allosaurus
ⓘ
Apatosaurus ⓘ Brachiosaurus ⓘ Camarasaurus ⓘ Diplodocus ⓘ Dryosaurus ⓘ Othnielosaurus ⓘ Stegosaurus ⓘ |
| containsRockType | conglomerate ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| depositionalEnvironment |
eolian
ⓘ
floodplain ⓘ fluvial ⓘ lacustrine ⓘ |
| discoveredIn | 19th century ⓘ |
| fossilRichness | exceptionally rich dinosaur fossil assemblage ⓘ |
| geographicExtent |
from Arizona to South Dakota
ⓘ
from New Mexico to Montana ⓘ |
| geologicAgeRange |
Kimmeridgian limestone
ⓘ
surface form:
Kimmeridgian
Tithonian ⓘ |
| geologicGroup | San Rafael Group ⓘ |
| geologicPeriod | Late Jurassic ⓘ |
| locatedInRegion | western United States ⓘ |
| namedFor | Morrison, Colorado ⓘ |
| notableLocality |
Cleveland-Lloyd Dinosaur Quarry
ⓘ
Como Bluff ⓘ Dinosaur National Monument ⓘ Garden Park, Colorado ⓘ |
| overlies |
Summerville Formation
ⓘ
Sundance Formation ⓘ |
| paleontologicalSignificance | one of the most productive dinosaur-bearing formations in the world ⓘ |
| primaryLithology |
limestone
ⓘ
mudstone ⓘ sandstone ⓘ siltstone ⓘ |
| thickness | up to about 300 meters ⓘ |
| timeSpanEndMa | approximately 146 ⓘ |
| timeSpanStartMa | approximately 156 ⓘ |
| underlies |
Cloverly Formation
ⓘ
Dakota Formation ⓘ |
Referenced by (33)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Upper Morrison Formation
this entity surface form:
Morrison Formation, western United States
this entity surface form:
Brushy Basin Member of the Morrison Formation
this entity surface form:
Morrison Formation dinosaur-bearing beds