crinoidal limestone
Fossiliferous limestone composed almost entirely of the fossil skeletal parts of crinoids, marine invertebrates of the phylum Echinodermata; crinoidal limestone is particularly plentiful in North America.
Fossiliferous limestone composed almost entirely of the fossil skeletal parts of crinoids, marine invertebrates of the phylum Echinodermata; crinoidal limestone is particularly plentiful in North America.
