Cretaceous acid
Cretacic Cre*tac"ic [Webster 1913 Suppl. +PJC]

{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}. [1913 Webster +PJC]


The Collaborative International Dictionary of English. 2000.

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  • Cretaceous formation — Cretacic Cre*tac ic [Webster 1913 Suppl. +PJC] {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;… …   The Collaborative International Dictionary of English

  • Cretaceous period — Cretacic Cre*tac ic [Webster 1913 Suppl. +PJC] {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;… …   The Collaborative International Dictionary of English

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  • chalk formation — Cretacic Cre*tac ic [Webster 1913 Suppl. +PJC] {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;… …   The Collaborative International Dictionary of English

  • Cretacic — Cre*tac ic [Webster 1913 Suppl. +PJC] {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 Collaborative International Dictionary of English

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