The rugose coral Ankhelasma
Subtitle: index to Viséan (lower Carboniferous) shelf margin in the western interior of North America
By: by William J. Sando, E. Wayne Bamber, and Barry C. Richards.
Contributors: Bamber, E. W.; Richards, B. C.
Series: U.S. Geological Survey bulletin -- 1895-B; Shorter contributions to paleontology and stratigraphy
Publisher: U.S. G.P.O.
Published: 1990
Place of publication: [Washington]
Language: eng
Number of pages: 29
Subjects: Rugosa -- North America.; Corals, Fossil -- North America.; Paleontology -- North America -- Carboniferous.; Paleontology -- Carboniferous.
Notes: "Predictions of Carboniferous shelf-margin locations using the living zone of a rugose coral."

Includes bibliographical references (p. 17-19).