Meaning of Morrison Formation | Babel Free
Definitions
A sequence of Upper Jurassic sedimentary rock in the western United States, noted as the most fertile source of dinosaur fossils in North America.
Equivalents
Examples
“Later it was given a member rank and assigned to the Morrison Formation[…].”
“The paleoecology of the Morrison Formation is still a matter of debate (compare Dodson and others 1980 and 1983 with Tidwell 1990).”
“In all areas of Utah where it has been dated, the uppermost Morrison Formation is 148 Ma based on ^{₄₀}\!Ar/^{₃₉}\!Ar ages (Kowallis and others, 1988), placing it in the early Tithonian (Ogg, 2004).”
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.