Found 1 items, similar to pentamerus limestone.
English → English (gcide) Definition: Pentamerus limestone Pentamerus \Pen*tam"e*rus\, n. [NL. See Pentamerous.] (Paleon.) A genus of extinct Paleozoic brachiopods, often very abundant in the Upper Silurian. [1913 Webster] Pentamerus limestone (Geol.), a Silurian limestone composed largely of the shells of Pentamerus. [1913 Webster]