Cretaceous - Law Dictionary Search Results
Home Dictionary Name: cretaceousCretaceous Tertiary boundary
a thin layer of geologic deposits of varying thickness in different parts of the world found between the geological strata identified as Cretaceous and the strata above identified as Tertiary also the time point or period marking the boundary between the Cretaceous and Tertiary periods...
Cretaceous
Having the qualities of chalk abounding with chalk chalky as cretaceous rocks and formations See Chalk...
Baculite
A cephalopod of the extinct genus Baculites found fossil in the Cretaceous rocks It is like an uncoiled ammonite...
Belemnite
A conical calcareous fossil tapering to a point at the lower extremity with a conical cavity at the other end where it is ordinarily broken but when perfect it contains a small chambered cone called the phragmocone prolonged on one side into a delicate concave blade the thunderstone It is the internal shell of a cephalopod related to the sepia and belonging to an extinct family The belemnites are found in rocks of the Jurassic and Cretaceous ages...
ceratopsian
any of several four footed herbivorous horned dinosaurs with enormous beaked skulls of the late Cretaceous in North America and Mongolia...
Colorado group
A subdivision of the cretaceous formation of western North America especially developed in Colorado and the upper Missouri region...
Cretaceously
In a chalky manner as chalk...
Cretose
Chalky cretaceous...
Dakota group
A subdivision at the base of the cretaceous formation in Western North America so named from the region where the strata were first studied...
Elasmosaurus
An extinct long necked marine cretaceous reptile from Kansas allied to Plesiosaurus...
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