How to use in-sentence of “calcareous”:
+ The terrestrial sediments of the Morrison Formation were deposited on top of the calcareous Sundance Formation as the sea retreated for the last time, late in the Jurassic.
+ Their bodies are flattened from side to side and protected by a bivalve-like, chitinous or calcareous valve or “shell”.
+ One of the most important events during bryozoan evolution was the acquisition of a calcareous skeleton and the mechanism of tentacle protrusion.
+ Widespread carbonate deposition suggests that the Seaway was warm and tropical, with abundant calcareous algae.
+ The shell is porous to air, and may be flexible or calcareous.The calcareous shell prevents the egg from desiccation.
