The lake bottom was covered in calcareous sediment.
calcareous deposits
Frequency:
60
%
The cave was filled with calcareous deposits.
calcareous algae
Frequency:
50
%
The coral reef was formed by calcareous algae.
Idiomatic Expressions for calcareous
Phrase: calcareous deposits
Meaning: refers to the accumulation of calcium carbonate in a particular area
Usage: The cave was filled with beautiful stalactites and stalagmites formed by calcareous deposits over centuries.