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Ernst Cloos papers

 Collection
Identifier: MS-0124
Overview Ernst Cloos (1898-1974) was a structural geologist and professor at The Johns Hopkins University. The collection documents Cloos's field work and research through his meticulous, detailed field notebooks and research data dating from 1921-1980.

Francis Pettijohn papers

 Collection
Identifier: MS-0638
Overview Francis John Pettijohn (1904-1999) was an American geologist.This collection consists of research materials and notes from 1929 through 1951. This collection is unprocessed.