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A kind of shell limestone, whose strata form the middle one of the three divisions of the Triassic formation in Germany. See Chart, under Geology.

A kind of shell limestone, whose strata form the middle one of the three divisions of the Triassic formation in Germany. See Chart, under Geology.

mush'el-kalk, n. the middle member of the Triassic system as developed in Germany, consisting chiefly of limestone--wanting in Britain. [Ger. muschel, shell, kalk, lime.]

[Ger.] (Geol.) Compact greyish limestone, with abundant remains of molluscs and encrinites; the middle member of the Triassic period, or New Red Sandstone. W. Europe; absent from England.