Reports
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 83895
The upper Chitina Valley, Alaska, with a description of the igneous rocks
No abstract available.
Authors
Fred Howard Moffit, Robert Milton Overbeck
Thirty-ninth annual report of the Director of the United States Geological Survey
The appropriations for the work of the United States Geological Survey for the fiscal year 1917-18 comprised items amounting to $1,750,520. The plan of operations as approved by the Secretary of the Interior contemplated surveys and investigations in the United States and Alaska designed mainly to obtain information or to encourage activities essential to the rapid and successful prosecution of th
Authors
George Otis Smith
Topographic instructions of the United States Geological Survey
This book is intended to replace the instructions relating to the topographic work of the United States Geological Survey, issued as a part of the general Survey, instructions of 1903, which are now in many respects obsolete, although revised portions of them have, from time to time, been issued as circular letters or printed leaflets. The several portions of this book were prepared by the members
Authors
Second report of the Hawaiian Volcano Observatory of the Massachusetts Institute of Technology and the Hawaiian Volcano Research Association: On cyclical variations in eruption at Kilauea
This work treats chiefly of observed changes in the height of stand of molten lava in the crater of Kilauea. It also takes account of concurrent variations in the apparent energy of eruptive action at the surface of the magma column. With little doubt these conditions vary in a complex periodic way.To explain these periods in part an hypothesis is advanced which depends upon recurrent astronomical
Authors
Harry O. Wood
A fossil flora from the Frontier formation of southwestern Wyoming
This paper deals with a small but important fossil flora, now known to be of Colorado age, from the vicinity of Cumberland, Lincoln County, Wyo. It was for many years thought to be of Jurassic age, and only within the last decade has its stratigraphic position been established. Although small in number of species, this flora offers information bearing on the physical and climatic conditions that p
Authors
F. H. Knowlton
A reconnaissance of the Archean complex of the Granite Gorge, Grand Canyon, Arizona
The field work upon which this article is based was done in March and April, 1914. From Garnet Canyon, near the west end of the Granite Gorge, the route followed the Tonto trail along the so-called lower plateau, or Tonto platform, to Red Canyon, at the east end of the Granite Gorge.
Authors
L. F. Noble, J. Fred Hunter
Anticlines in the southern part of the Big Horn Basin, Wyoming: A preliminary report on the occurrence of oil
No abstract available.
Authors
D. F. Hewett, Charles Thomas Lupton
Bibliography of North American geology for 1916, with subject index
No abstract available.
Authors
John M. Nickles
Brachyceratops, a ceratopsian dinosaur from the Two Medicine formation of Montana, with notes on associated fossil reptiles
The fossils on which this paper is based were collected by me and my assistant, Mr. J. F. Strayrer, during the summer of 1913, while working under the auspices of the United States Geological Survey on the Blackfeet Indian Reservation, in northwestern Montana. The specimens were obtained from exposures of the Two Medicine formation along Milk River near the Canadian boundary, in T. 37 N., R. 8 W.,
Authors
Charles W. Gilmore