Found in 4 Collections and/or Records:
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 John Pettijohn (1904-1999) was an American geologist.This collection consists of research materials and notes from 1929 through 1951. This collection is unprocessed.
James Croll (1821-1890) was a Scottish geologist and climatologist. This collection consists of one letter of James Croll to Henry Sidgwick, May 12, 1883, asking for Sidgwick's opinion of an article.