Petrographical differentiation of certain dykes of the Rainy Lake region
By: by Andrew C. Lawson ; with analyses by F.T. Shutt.
Contributors: Shutt, Frank T. 1859-1940.
Series: CIHM/ICMH Microfiche series -- no. 24802
Publisher: s.n.
Published: 1981
Place of publication: [S.l
Language: eng
Format: Microform
Number of pages: 11
Subjects: Dikes (Geology) -- Ontario.; Geology -- Ontario.; Rainy Lake region (Ont. and Minn.).
Other titles: The American geologist.
Notes: Caption title.

"From the American Geologist, March, 1891."

Filmed from a copy of the original publication held by the Library, Geological Survey of Canada. Ottawa : Canadian Institute for Historical Microreproductions, 1981.