Additions to the flora of the Spotted Ridge formation in central Oregon
Subtitle: the U.S. Geological Survey's previously undescribed collection of fossil plants from the Spotted Ridge formation is fully described and illustrated, including three new species
By: by Sergius H. Mamay and Charles B. Read.
Contributors: Read, C. B.; Geological Survey (U.S.)
Series: Geological Survey professional paper -- 274-I; Shorter contribution to general geology; Shorter contributions to general geology
Publisher: U.S. G.P.O.
Published: 1956
Place of publication: Washington
Language: eng
Number of pages: 226
Subjects: Paleobotany -- Pennsylvanian.; Paleobotany -- Oregon, Central
Notes: Includes bibliographical references and index.