Definition of "cretaceous" [cretaceous]

• Of or relating to chalk. (adjective)
• Consisting of chalk. (adjective)

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• "It takes in a great part of New Brunswick and certain spots or areas in Nova Scotia; and another great coal-bearing system which we call the cretaceous and the tertiary in the mountain valleys of British Columbia."
• "The record of this period consists of a series of strata, in which chalk beds make a conspicuous appearance, and which is therefore called the cretaceous system or formation."
• "He said in the exploration of oil the set of system geologists refer to as the cretaceous rock, which is an oil bearing rock is said to be found in the gulf of Guinea stretching from Ghana, Ivory Coast, Liberia and Sierra Leone."