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Topographic instructions of the United States Geological Survey. Leveling
No abstract available.
Authors
E. M. Douglas
Topographic instructions of the United States Geological Survey. Map compilation from aerial photographs
No abstract available.
Authors
T.P. Pendleton
Topographic instructions of the United States Geological Survey. Topographic mapping
No abstract available.
Authors
W.M. Beaman
Topographic instructions of the United States Geological Survey. Transit traverse
No abstract available.
Authors
E. M. Douglas
Topographic instructions of the United States Geological Survey. Triangulation
No abstract available.
Authors
E. M. Douglas
A comparison of the genera Metaplacenticeras Spath and Placenticeras Meek
In a recent examination of a considerable suite of specimens from the Western Interior of the United States belonging to the Cretaceous ammonite genus
Placenticeras Meek the writer made comparisons of the species from the Interior with those from the Cretaceous of the Pacific coast ordinarily designated
Placenticeras pacificum J. P. Smith, P. calijornicum Anderson, and P. sanctaemonicae Waring.
Authors
John B. Reeside
A manganese deposit of Pleistocene age in Bannock County, Idaho: Chapter H in Contributions to economic geology (short papers and preliminary reports), 1927: Part I - Metals and nonmetals except fuels
Reports of the discovery and exploration of manganese deposits in southeastern Idaho within recent years having come to the Geological Survey, the writer took advantage of an opportunity to spend a day at the deposits in October, 1926. The examination was made in company with V. C. Heikes, of the Bureau of Mines. The local operators, especially Mr. George L. Smith, of the Idaho Manganese Co., cour
Authors
D. F. Hewett
American Tertiary mollusks of the genus Clementia
Aside from its value as an aid in determining the age of Tertiary beds, the chief interest of the genus Clementia lies in the anomalous features of its present
and former distribution. An attempt is made in this paper to trace its geologic history, to point out its paleobiologic significance, and to describe all the known American Tertiary species. The fossils from Colombia used in preparing this
Authors
W. P. Woodring