Related to Cretacic: Paleogene Period, Cretaceous System


2.(Geol.) Of, pertaining to, or designating, the period of time following the Jurassic and preceding the Tertiary, generally given as from 144 million years b. p. to 65 million years b. p.. Also called Cre*tac"ic.
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, and at the end of which the dinosaurs died out. See Cretaceous.
References in periodicals archive ?
58) are lower than those of high maturity to overmature Ordovician crude oils in the Tarim basin, and similar to those of mature Ordovician source rocks in Dagang Oilfield and Cretacic source rocks in the Coqen basin, Tibet [30, 31].
In the studied area there are NE trending inverse faults parallel to the regional structures of the EC and NW trending normal fractures, parallel to the lineaments that Ujueta (1991, Figure 3) proposed to link volcanic and intrusive rocks, such as Cretacic basalts and gabbros, alkaline intrusive bodies and high temperature geothermal springs.