资料来源 : pyDict

镁灰岩

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Zechstein \Zech"stein`\, n. [Gr., fr. zeche a mine + stein a
   stone.] (Geol.)
   The upper division of the Permian (Dyas) of Europe. The
   prevailing rock is a magnesian limestone.