The Helderberg Group and the position of the Silurian-Devonian boundary in North America
By: by Jean M. Berdan.
Series: Geological Survey bulletin -- 1180-B; Contributions to stratigraphic paleontology
Publisher: U.S. G.P.O.
Published: 1964
Place of publication: Washington
Language: eng
Number of pages: 19
Subjects: Geology, Stratigraphic -- Devonian.; Geology, Stratigraphic -- Silurian.; Geology -- East (U.S.); Groups (Stratigraphy) -- East (U.S.); Geology, Stratigraphic -- Nomenclature -- New York (State); Stratigraphic correlation -- East (U.S.); Limestone -- East (U.S.); Paleontology -- Devonian.; Paleontology -- East (U.S.) -- Devonian.
Genres: Nomenclature
Notes: "An historical summary including a review of pertinent literature."

Includes bibliographical references (p. 18-19).