Revisions of stratigraphic nomenclature within the Keweenawan supergroup of northern Michigan
By: by William F. Cannon and Suzanne W. Nicholson. Geochemistry, petrography, and volcanology of rhyolites of the Portage Lake volcanics, Keweenaw Peninsula, Michigan / by Suzanne W. Nicholson.
Contributors: Nicholson, Suzanne W.; Nicholson, Suzanne W.
Series: Contributions to the geology and mineral resources of the midcontinent rift system ;; ch. A-B; U.S. Geological Survey bulletin ;; 1970 A-B
Publisher: U.S. G.P.O.; For sale by Book and Open-File Report Sales, U.S. Geological Survey
Published: 1992
Place of publication: Washington; Denver, CO
Language: eng
Subjects: Geology, Stratigraphic -- Proterozoic.; Volcanic ash, tuff, etc. -- Michigan.; Rhyolite -- Michigan -- Keweenaw Peninsula.; Porcupine Volcanics (Mich.); Bergland Group (Mich.); Copper Harbor Conglomerate (Mich.); Portage Lake Volcanics (Mich.)
Notes: Includes bibliographical references.