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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Television observations from Surveyor Television observations from Surveyor
Five successful Surveyor spacecraft landed on the Moon between June 1966 and January 1968 and returned over 87,000 pictures from the lunar surface. Surveyors I, III, V, and VI landed on mare surfaces; Surveyor VII landed in the southern highlands on the flank of the crater Tycho, the youngest, large bright-ray crater on the Moon.
Authors
Eugene Shoemaker, E. Morris, R. Batson, H. Holt, Kathleen Larson, D. Montgomery, J. Rennilson, E. Whitaker
Modern coastal mangrove swamp stratigraphy and the ideal cyclothem Modern coastal mangrove swamp stratigraphy and the ideal cyclothem
The general stratigraphy of the “ideal” cyclothem of Late Paleozoic age can be recognized in a modern succession of sedimentary units underlying the coastal mangrove swamps of southwestern Florida. Because coal deposition is associated with the formation of cyclothems, this stratigraphic similarity has geologic importance with respect to coal formation.The lower part of the succession in...
Authors
David Scholl
Geologic Settings of Subsidence Geologic Settings of Subsidence
This paper reviews the role of geologic processes that contribute to subsidence in order to aid those starting investigations of ground-surface subsidence. Subsidence occurs, or at least is discovered, only infrequently, and little organized information has been available. In order to assess our present state of knowledge, the author gathered fragmentary bits of information from many...
Authors
Alice Allen
The Cloudy Pass epizonal batholith and associated subvolcanic rocks The Cloudy Pass epizonal batholith and associated subvolcanic rocks
The Cloudy Pass batholith, one of several small epizonal Tertiary batholiths in the Northern Cascade Mountains, discordantly intrudes metamorphic rocks of pre-Late Cretaceous age. The batholith is remarkable for its chilled borders, associated porphyry plugs, and intrusive breccias. The main body of the batholith consists largely of labradorite granodiorite.Part of the northeast side of...
Authors
Fred W. Cater
Structural geology of the Quad-Wyoming-Line Creeks area, Beartooth Mountains, Montana Structural geology of the Quad-Wyoming-Line Creeks area, Beartooth Mountains, Montana
The Quad-Wyoming-Line Creeks area is in the northeastern part of the Beartooth Mountains of Montana. The rocks of the area consist mainly of banded migmatite, granitic gneisses, amphibolite, quartzite, and agmatite; small amounts of biotite schist and biotite gneiss, iron-silicate rocks, ultramafic rocks, mafic dikes, and felsic porphyries are also present. Quartzite outcrops...
Authors
Lawrence Rowan
Ecology of pocket gophers of Mesa Verde, Colorado Ecology of pocket gophers of Mesa Verde, Colorado
No abstract available.
Authors
C. Douglas
Black duck harvest and population dynamics in eastern Canada and the Atlantic Flyway Black duck harvest and population dynamics in eastern Canada and the Atlantic Flyway
No abstract available.
Authors
R. Martinson, A. Geis, R.I. Smith
Blood protozoa of free-living birds Blood protozoa of free-living birds
Blood protozoa were first reported from wild birds in 1884. Since then numerous surveys throughout the world have demonstrated their presence in a wide variety of hosts and localities with continuing designations of new species. Taxonomic determinations include parasites in the genera Plasmodium, Haemoproteus, Leucocytozoon, Babesia, Lankesterella and Trypanosoma. Transmission of...
Authors
C. Herman
Cold-blooded vertebrate immunity to metazoa Cold-blooded vertebrate immunity to metazoa
No abstract available at this time
Authors
S. Snieszko
Environment of Mesa Verde, Colorado Environment of Mesa Verde, Colorado
No abstract available at this time
Authors
J. Erdman, C. Douglas, J. Marr
Geologic setting of the lunar samples returned by the Apollo 11 mission Geologic setting of the lunar samples returned by the Apollo 11 mission
The Apollo 11 LM landed approximately 20 km south-southwest of the crater Sabine D in the southwestern part of Mare Tranquillitatis ( fig. 3-1 ). The landing site is 41.5 km north-northeast of the western promontory of the Kant Plateau (ref. 3-1 ), which is the nearest highland region. The Surveyor 5 spacecraft is approximately 25 km north-northwest of the Apollo 11 landing site, and the...
Authors
E.M. Shoemaker, N. Bailey, R. Batson, D.H. Dahlem, T.H. Foss, M. J. Grolier, E. Goddard, M. H. Hait, H. Holt, K.B. Larson, J. Rennilson, G. Schaber, D. Schleicher, H.H. Schmitt, R. Sutton, G.A. Swann, A. Waters, M.N. West