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Page 4443, results 111051 - 111075

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Not all publications have extents, not all extents are completely accurate
Mineral resources of the Castle Peaks Wilderness Study Area, San Bernardino County, California
David M. Miller, James G. Frisken, Robert C. Jachens, Diann D. Gese
1986, Bulletin 1713-A
The Castle Peaks Wilderness Study Area (CDCA266) comprises approximately 45,000 acres in the northern New York Mountains, San Bernardino County, California. At the request of the Bureau of Land Management, 39,303 acres of the wilderness study area were studied. The area was investigated during 1982-1985 using combined geologic, geochemical, and...
Volcanic rocks
1986, Report
Volcanoes have contributed significantly to the formation of the surface of our planet. Volcanism produced the crust we live on and most of the air we breathe. Often the remnants of an eruption are as revealing as the eruption itself, for they tell us many things about the eruption. Included...
Earthquakes
National Geophysical Data Center
1986, Report
An earthquake is the motion or trembling of the ground produced by sudden displacement of rock in the Earth's crust. Earthquakes result from crustal strain, volcanism, landslides, and collapse of caverns. Stress accumulates in response to tectonic forces until it exceeds the strength of the rock. The rock then breaks along a preexisting...
On tide-induced Lagrangian residual current and residual transport: 1. Lagrangian residual current
Shizuo Feng, Ralph T. Cheng, Xi Pangen
1986, Water Resources Research (22) 1623-1634
Residual currents in tidal estuaries and coastal embayments have been recognized as fundamental factors which affect the long-term transport processes. It has been pointed out by previous studies that it is more relevant to use a Lagrangian mean velocity than an Eulerian mean velocity to determine the movements of water...
Arctic National Wildlife Refuge land cover mapping project user's guide
Carl J. Markon
1986, Report
Section 1002 of the Alaska National Interest Lands Conservation Act of 1980 (ANILCA, 1980) requires the Secretary of Interior to conduct a continuing study of fish, wildlife, and habitats on the coastal plain of the Arctic National Wildlife Refuge (ANWR). Included in this study is a determination of the extent, location, and carrying capacity of...
Evaluation of Alaskan wetlands for waterfowl
Calvin J. Lensink, Dirk V. Derksen
1986, Conference Paper, Alaska: Regional wetland functions: Proceedings of a workshop held at Anchorage, Alaska, May 28-29, 1986
Few studies have focused specifically on use of Alaskan wetlands by waterfowl. However, substantial information on the values of wetlands is available from studies on individual species or that were conducted for other purposes. Most investigators have found it most effective to classify habitat use on the basis of observed...
On tide-induced Lagrangian residual current and residual transport: 2. Residual transport with application in south San Francisco Bay, California
Shizuo Feng, Ralph T. Cheng, Xi Pangen
1986, Water Resources Research (22) 1635-1646
The transports of solutes and other tracers are fundamental to estuarine processes. The apparent transport mechanisms are convection by tidal current and current-induced shear effect dispersion for processes which take place in a time period of the order of a tidal cycle. However, as emphasis is shifted toward the effects...
Hydrology of carbonate aquifers in southwestern Linn County and adjacent parts of Benton, Iowa, and Johnson Counties, Iowa
Kenneth Wahl, Bill J. Bunker
1986, Water Supply Bulletin 15
Groundwater is the major source of water in Linn County and the surrounding area. Approximately 90 percent of the groundwater production is from Silurian, Devonian, and Quaternary aquifers. The Silurian and Devonian aquifers consist of limestone and dolomite with minor shale beds, which have a regional dip to the southwest of...
Geology and geochemistry of the Deer Trail Pb-Zn-Ag-Cu manto deposits, Marysvale District, west-central Utah
D.W. Beaty, C. G. Cunningham, R.O. Rye, T. A. Steven, E. Gonzalez- Urien
1986, Economic Geology (81) 1932-1952
Strata-bound sulphide replacement bodies in the Deer Trail mine are sinuous pipes in carbonate beds, approximately localized by an anticlinal axis, and radiate from a fault across the lower part of the Permian Toroweap formation. Indistinct sericitic envelopes provide a K/Ar age of 14 m.y., correlative with barren, altered volcanic...