Mica and beryl pegmatites in Idaho and Montana. A description of mines and prospects examined in each district, some illustrated by maps and structure sections.

By: Material type: TextTextSeries: Geological Survey (U.S.). Professional paper ; 229.Publication details: Washington, U.S. Govt. Print. Off., 1950.Description: v, 64 p. illus., maps (8 fold. in pocket) 29 cmSubject(s): DDC classification:
  • 553.9
LOC classification:
  • QE75 .P9 no. 229
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