An early Reticuloceras Zone fauna from the Hale Formation in northwestern Arkansas.
Series: Geological Survey professional paper ;; 613-A.; Contributions to paleontology; Geological Survey professional paper ;; 613-A.; Geological Survey professional paper.
Publisher: U.S. Govt. Print. Off.
Published: 1968
Place of publication: Washington
Language: eng
Number of pages: 21
Subjects: Ammonoidea.; Paleontology -- Pennsylvanian.; Paleontology -- Arkansas -- Washington Co.
Notes: Bibliography: p. 18-19.