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Publication Extents

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Protection of roads against rock falls
Leo Maddalena
1948, Open-File Report 48-17-C
"Protection of roads against rock falls", by Leo Maddalena, describes the relation between rock falls and the degree of fissuring and the mineralogy of the rocks involved. The characteristics of various types of rocks are outlined and suitable types of protection described....
Application of Brianchon's theorem to construction of geologic profiles
J.B. Mertie Jr.
1948, Geological Society of America Bulletin (59) 767-786
Brianchon's theorem states that the three diagonals joining opposite vertices of a hexagon circumscribed about a conic are concurrent. A corollary of this theorem applies to a pentagon so that the points of tangency of an inscribed conic may be located. Any five non-concurrent straight lines in a plane, no...
Preliminary report on the stratigraphy and structure of the area of the Ipnavik River, Alaska
Karl Stefansson
1948, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 16
Geological Survey Party 1 returned to Umiat from Wolf Creek on August 5. Plans for the field season of 1947 called for geologic reconnaissance along part of the Ipnavik River and along the Colville River between the Ipnavik and Kurupa Rivers, to be completed before the end of the season....