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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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Chapter 22: Changing patterns of extensional tectonics; Overprinting of the basin of the middle and upper Miocene Esmeralda Formation in western Nevada by younger structural basins Chapter 22: Changing patterns of extensional tectonics; Overprinting of the basin of the middle and upper Miocene Esmeralda Formation in western Nevada by younger structural basins
The middle and upper Miocene Esmeralda Formation of western Nevada was deposited in a continental basin that crops out over an area of about 2,000 km2. The formation consists of thin, westerly derived sedimentary rocks in the western three-quarters of the outcrop area and of thick (3+ km) easterly derived sedimentary rocks in the eastern quarter. Megabreccias along the eastern margin of...
Authors
John H. Stewart, David S. Diamond
Chapter 10: Shallow crustal deformation in the Pahranagat area, southern Nevada Chapter 10: Shallow crustal deformation in the Pahranagat area, southern Nevada
The Pahranagat area lies in the Basin and Range Province of southern Nevada. Paleozoic rocks in the study area were folded and faulted during the Sevier orogeny and subsequently extended prior to deposition of Tertiary strata. Middle Oligocene strata overlie the Paleozoic rocks with pronounced angular unconformity and were deposited on rocks of Late Cambrian through Pennsylvanian age in...
Authors
Angela S. Jayko
Chapter 6: Petrogenesis of the composite peraluminous-metaluminous Old Woman-Piute Range batholith, southeastern California; isotopic constraints Chapter 6: Petrogenesis of the composite peraluminous-metaluminous Old Woman-Piute Range batholith, southeastern California; isotopic constraints
The Late Cretaceous Old Woman–Piute Range batholith includes both metaluminous and strongly peraluminous granitoid series that intruded the reactivated craton of southeastern California shortly after the orogenic peak. Whole-rock Sr, Nd, and O, feldspar Pb, and zircon U-Pb isotopic compositions, in combination with major- and trace-element and petrographic data, indicate that although...
Authors
Calvin F. Miller, Joseph L. Wooden, Victoria C. Bennett, James E. Wright, G. Cleve Solomon, Richard W. Hurst
The effect of developmental activities on water quality functions of bottomland hardwood ecosystems: the report of the water quality workgroup The effect of developmental activities on water quality functions of bottomland hardwood ecosystems: the report of the water quality workgroup
No abstract available.
Authors
M. L. Scott, B.A. Kleiss, W.H. Patrick, C.A. Segelquist
The calculation of flushing flows for gravel and cobble bed rivers The calculation of flushing flows for gravel and cobble bed rivers
No abstract available.
Authors
Robert T. Milhous
Introduction Introduction
No abstract available.
Authors
J. E. Roelle, Gregor T. Auble, J. G. Gosselink
Mammals of La Selva, Costa Rica Mammals of La Selva, Costa Rica
No abstract available.
Authors
Don E. Wilson
Altered flows and created landscapes in the Platte River Headwaters, 1840-1990 Altered flows and created landscapes in the Platte River Headwaters, 1840-1990
No abstract available.
Authors
Fritz L. Knopf, Michael L. Scott
Human activities and ecological processes in bottomland hardwood ecosystems: the report of the Ecosystem Workgroup Human activities and ecological processes in bottomland hardwood ecosystems: the report of the Ecosystem Workgroup
No abstract available.
Authors
J. G. Gosselink, M.M. Brinson, L.C. Lee, Gregor T. Auble
Embryotoxicity and teratogenicity of environmental contaminants to bird eggs Embryotoxicity and teratogenicity of environmental contaminants to bird eggs
In light of recent ecological disasters such as the Exxon Valdez oil spill of 1989, which has already claimed the lives of thousands of aquatic birds with the reproductive success of countless others at risk, there is a need to evaluate the embryotoxic potential of a continuously growing number of industrial and agricultural environmental contaminants that may come in direct contact with...
Authors
David J. Hoffman
The California Valley grassland The California Valley grassland
Grasslands are distributed throughout California from Oregon to Baja California Norte and from the coast to the desert (Brown 1982) (Figure 1). This review will focus on the dominant formation in cismontane California, a community referred to as Valley Grassland (Munz 1959). Today, Valley Grassland is dominated by non-native annual grasses in genera such as Avena (wild oat), Bromus...
Authors
Jon E. Keeley
Sampling methods for terrestrial amphibians and reptiles Sampling methods for terrestrial amphibians and reptiles
No abstract available.
Authors
P.S. Corn, R.B. Bury