Thesaurus: cretaceous

Related headwords

Definitions

1. a. Having the qualities of chalk; abounding with chalk; chalky; as, cretaceous rocks and formations. See Chalk.
2. adj. of or relating to or denoting the third period of the Mesozoic era
3. adj. abounding in chalk
4. Having the qualities of chalk;abounding with chalk; chalky; as, cretaceous rocks and formations. See Chalk. Cretaceous acid, an old name for carbonic acid. -- Cretaceous formation (Geol.), the series of strata of various kinds, including beds of chalk, green sand, etc., formed in the Cretaceous period; -- called also the chalk formation. See the Diagram under Geology. -- Cretaceous period (Geol.), the time in the latter part of the Mesozoic age during which the Cretaceous formation was deposited. Of, pertaining to, or designating, the period of time following the Jurassic and preceding the Eocene.
5. Having the qualities of chalk;abounding with chalk; chalky; as,cretaceous rocks and formations. See Chalk. Cretaceous acid, an oldname for carbonic acid.-- Cretaceous formation (Geol.), the series of strata of variouskinds, including beds of chalk, green sand, etc., formed in theCretaceous period; -- called also the chalk formation. See theDiagram under Geology.-- Cretaceous period (Geol.), the time in the latter part of theMesozoic age during which the Cretaceous formation was deposited.
6. j:100 n. from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants a. abounding in chalk a. of or relating to or denoting the third period of the Mesozoic era