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1900 Plate CXXXVIII. Dayton Quadr … [Geologic Atlas, Geology Boo Plate CXXXVIII. Dayton Quadr … |
1900 Plate CXXXIX. Bald Mountain … [Geologic Atlas, Geology Boo Plate CXXXIX. Bald Mountain … |
1900 Plate CXL. Cloud Peak Quadra … [Geologic Atlas, Geology Boo Plate CXL. Cloud Peak Quadra … |
1900 Plate CXLI. Newcastle Quadra … [Geologic Atlas, Geology Boo Plate CXLI. Newcastle Quadra … |