K-Ar ages for hornblende from granites and gneisses and for basaltic intrusives in Minnesota
By: G.N. Hanson.
Series: Report of investigations -- 8; Report of investigations (Minnesota Geological Survey) -- 8.
Publisher: Minnesota Geological Survey
Published: 1968
Place of publication: Minneapolis
Language: eng
Number of pages: 20
Subjects: Hornblende -- Minnesota.; Geological time.
Notes: Cover title.

Includes bibliographical references.