Archival objects in this container: Notes on Frenchman Mountain, approximately 1917 to 1974 Pakoon Formation, approximately 1917 to 1974 The Pennsylvania-Permian boundary in southern Nevada, approximately 1917 to 1974 Magnetic survey of part of the deep sea floor, 1958 Notes on Black Hills Rim project, approximately 1917 to 1974 Page from Muddy Mountains report, approximately 1917 to 1974 Preferential Emphasis in Geological Research, Why?: draft, approximately 1917 to 1974 Primary documents of earth history, approximately 1917 to 1974 Problems of Orogeny: draft, 1940 Proposed tectonic map of the United States, 1934