Effects of cover materials on leaching of constituents from dolomitic lead mine tailings
J.J. Harwood, S. R. Koirtyohann, C.J. Schmitt
1987, Water, Air, & Soil Pollution (34) 31-43
Five raised-bed test plots were used to study the effects of cover materials on the leaching of constituents from dolomitic Pb mine tailings over a 2-yr period. The cover materials studied were a fertilizer and seed mixture, anaerobically digested sewage sludge, loam and sod, and fallen leaves from silver maples...
Crustal extension along a rooted system of imbricate low-angle faults: Colorado River extensional corridor, California and Arizona
Keith A. Howard, B.E. John
1987, Geological Society Special Publication (28) 299-311
The upper 10 to 15 km of crystalline crust in the 100-km-wide Colorado River extensional corridor of mid-Tertiary age underwent extension along an imbricate system of gently dipping normal faults. Detachment faults cut gently down-section eastward in the direction of tectonic transport from a headwall breakaway, best expressed in the...
Thermal maturity of tectonostratigraphic terranes within the Franciscan Complex, California
M.B. Underwood, M. Clark Blake Jr., D. G. Howell
E.C. Leitch, Erwin Scheibner, editor(s)
1987, Book chapter, Terrane Accretion and Orogenic Belts
Indicators of organic metamorphism provide valuable tools for analyzing the thermal history of tectonostratigraphic terranes. Paleotemperature estimates derived from vitrinite reflectance, for example, are more precise than values based upon inorganic mineral assemblages in low‐grade rocks. Isothermal geometries must be interpreted within the context of structural...
In search of the Abrams post office, Trinity County
Marvin A. Lanphere, William P. Irwin
1987, California Geology (40) 99-103
An understanding of earth history depends in part on stratigraphy, a division of geology in which the distinctive features of natural units or formations of layered rocks are studied and described and names are assigned to them. The procedures for describing and naming rock units in a uniform way are...
Ground-water contamination near a uranium tailings disposal site in Colorado
Daniel J. Goode, Russell J. Wilder
1987, Ground Water (25) 545-554
Contaminants from uranium tailings disposed of at an active mill in Colorado have seeped into the shallow ground water onsite. This ground water discharges into the Arkansas River Valley through a superposed stream channel cut in the resistant sandstone ridge at the edge of a synclinal basin. In the river...
Correlation of early Cretaceous blueschists in Washington, Oregon and northern California
E. H. Brown, M.C. Blake Jr.
1987, Tectonics (6) 795-806
The protolith and metamorphic histories of Early Cretaceous blueschists that occur in Washington, Oregon, and California are remarkably similar. These blueschists are the Shuksan metamorphic suite of northwestern Washington, the Condrey Mountain schist of northern California and southern Oregon, and the Pickett Peak terrane of northern California and southwestern Oregon....
Remagnetization of the Coast Range Ophiolite and Lower Part of the Great Valley Sequence in Northern California and Southwest Oregon
L.S. Frei, M. Clark Blake Jr.
1987, Journal of Geophysical Research B: Solid Earth (92) 3487-3499
Overprinted magnetizations have been found at four localities in the Middle Jurassic Coast Range ophiolite and the overlying Upper Jurassic and Lower Cretaceous Great Valley sequence in northern California and at one locality in the partially correlative Lower Cretaceous Days Creek Formation in southwest Oregon. At Del Puerto Canyon, on...
Attenuation of the Coast Range ophiolite by extensional faulting and nature of the Coast Range "thrust," California
A. S. Jayko, M. Clark Blake Jr., Tekla Harms
1987, Tectonics (6) 475-488
The late Mesozoic Coast Range ophiolite and Great Valley sequence in California were juxtaposed against the Franciscan Complex during a long tectonic history that included imbricate thrust faulting, low‐angle detachment, and high‐angle reverse faulting. Many low‐angle faults previously mapped as thrusts invariably juxtapose younger over older rocks, suggesting a normal...
Petrology and K-Ar ages of the Misheguk igneous sequence, an allochthonous mafic and ultramafic complex, and its metamorphic aureole, western Brooks Range, Alaska
J.M. Boak, D. L. Turner, D.J. Henry, Thomas E. Moore, W. K. Wallace
1987, Book chapter, North Slope Geology
No abstract available....
Unconformity between Coast Range ophiolite and part of the lower Great Valley sequence, South Fork of Elder Creek, Tehama County, California
Blake, A. S. Jayko, D. L. Jones, B. W. Rogers
Mason L. Hill, editor(s)
1987, Book chapter, Cordilleran Section of the Geological Society of America
The South Fork of Elder Creek is located on private property about 6 mi (10 km) northwest of Paskenta, Calif. (Fig. 1). To visit this locality it is necessary to call Mr. Les Sutfin (916-824-4628) and arrange to pick up the key to the gate at his home in Corning....
Tectonostratigraphic terranes of the Croissilles Harbour region, South Island, New Zealand
C. A. Landis, M. Clark Blake Jr.
1987, Book chapter, Terrane accretion and orogenic belts
The boundary between Hokonui and Te Anau assemblages is flanked by a broad (10–20 km) zone of imbricated slabs of late Paleozoic and Mesozoic lithostratigraphic terranes. Five terranes are mapped, three of predominantly sedimentary character (Dun Mountain‐Maitai, Rai, Pelorus) are separated by two consisting of ophiolitic melange (Patuki, Croisilles). A...
Wetland changes in coastal Alabama
E. Randy Roach, Mary C. Watzin, James D. Scurry, James B. Johnston
1987, Conference Paper, Symposium on the Natural Resources of the Mobile Bay Estuary, February, 1987
The significance of observations at active volcanoes; A review and annotated bibliography of studies at Kilauea and Mount St. Helens
Thomas L. Wright, Don Swanson
1987, Geochemical Society Special Publication (1) 231-240
Study of active volcanoes yields information of much broader significance than to only the discipline of volcanology. Some applications are 1) interpretation of lava-flow structures, stratigraphic complexities, and petrologic relations in older volcanic units; 2) interpretation of bulk properties of the mantle and constraints on partial melting and deep magma...
Geomorphic and hydrologic dynamics of zero-order basins
Richard M. Iverson
1987, Eos, Transactions, American Geophysical Union (68) 1808-1808
The 1987 International Symposium on Erosion and Sedimentation in the Pacific Rim, held August 3–7, 1987, in Corvallis, Oreg., included a special session on the geomorphic and hydrologic dynamics of zero-order drainage basins. “Zero-order basin” is one of several terms used to describe unchanneled swales or hollows...
Hawaii Volcano Observatory 75th anniversary
Thomas L. Wright, R. Decker
1987, Eos, Transactions, American Geophysical Union (68) 570-570
The 75th anniversary of the founding of the U.S. Geological Survey (USGS) Hawaiian Volcano Observatory (HVO) was celebrated during January 1987. The festivities began on January 9 with the opening in Hilo of a major exhibit at the Wailoa Center on the current work of HVO, its history, and its...
Dinosaurs, pollen and spores, and the age of the Ojo Alamo Sandstone, San Juan Basin, New Mexico
James E. Fassett, S. G. Lucas, F.M. O’Neill
1987, GSA Special Papers (209) 17-34
The Ojo Alamo Sandstone of the San Juan Basin of New Mexico is composed of interbedded conglomeratic sandstone, sandstone, siltstone, and mudstone. Conglomerates are found in the western part of the basin; siliceous pebbles diminish in size both southward and eastward across the basin, becoming rare to nonexistent in the...
The ages of the continental, Upper Cretaceous, Fruitland Formation and Kirtland Shale based on a projection of ammonite zones from the Lewis Shale, San Juan Basin, New Mexico and Colorado
James E. Fassett
1987, GSA Special Papers (209) 5-16
The Kirtland Shale or Fruitland Formation directly underlies the Cretaceous-Tertiary boundary throughout most of the San Juan Basin of northwest New Mexico and southwest Colorado. These formations have been known to be Late Cretaceous in age since the early 1900s. Now, with the greatly renewed interest in rocks adjacent to...
Effect of crustal layering upon dislocation modeling
James C. Savage
1987, Journal of Geophysical Research B: Solid Earth (92) 10595-10600
Slip distribution at depth on a fault may be inferred from the deformation observed on the surface. In inverting the surface deformation data to obtain the slip distribution, the Earth is generally approximated by an elastic half‐space. Slip distributions inferred from a half‐space model may contain artifacts, including zones of...
Yukon Flats National Wildlife Refuge land cover mapping project user's guide
Carl J. Markon
1987, Report
Title III of the Alaska National Interest Lands Conservation Act (ANILCA, 1980) established the Yukon Flats National Wildlife Refuge (YFNWR). Section 304 of the Act requires the Secretary of Interior to "prepare, and from time to time revise, a comprehensive conservation plan" for the refuge. Before developing a plan for...
Use of the bottomland hardwoods subset of the wetland values data base
Gregor T. Auble
1987, Report
This report documents a bibliographic data base concerning functions and values of bottomland hardwoods and similarly vegetated areas. This data base is being provided for a limited time (until September 30, 1988) as a supplement to the publication entitled "Synopsis of Wetland Functions and Values: Bottomland Hardwoods with Special Emphasis...
Anaerobic production of magnetite by a dissimilatory iron-reducing microorganism
Derek R. Lovley, J.F. Stolz, Gordon L. Nord Jr., Elizabeth J.P. Phillips
1987, Nature (330) 252-254
The potential contribution of microbial metabolism to the magnetization of sediments has only recently been recognized. In the presence of oxygen, magnetotactic bacteria can form intracellular chains of magnetite while using oxygen or nitrate as the terminal electron acceptor for metabolism1. The production of ultrafine-grained magnetite by magnetotactic bacteria in...
Real-time landslide warning during heavy rainfall
David K. Keefer, R. C. Wilson, R. K. Mark, E. E. Brabb, W. M. Brown III, S. D. Ellen, E. L. Harp, G. F. Wieczorek, C.S. Alger, R.S. Zatkin
1987, Science (238) 921-925
A real-time system for issuing warnings of landslides during major storms is being developed for the San Francisco Bay region, California. The system is based on empirical and theoretical relations between rainfall and landslide initiation, geologic determination of areas susceptible to landslides, real-time monitoring of a regional network of telemetering...
Effects of wetland channelization of storm runoff in Lambert Creek, Ramsey County, Minnesota
R. G. Brown
1987, Conference Paper, National Wetlands Symposium of Wetland Hydrology, Chicago, Illinois, September 16-18, 1987 [Proceedings]
No abstract available....
Selenium in aquatic organisms from subsurface agricultural drainage water, San Joaquin Valley, California
Michael K. Saiki, T. Peter Lowe
1987, Archives of Environmental Contamination and Toxicology (16) 657-670
Concentrations of total selenium were high in 1983 in water, sediment, organic detritus, aquatic plants and invertebrates, and mosquitofish (Gambusia affinis) from Kesterson Reservoir (San Joaquin Valley, California) and the San Luis Drain. Selenium concentrations in biota from the Reservoir and Drain (referred to here collectively as “Kesterson”)...
Small-scale soil maps in the United States as prototypes for handling soils in a global geographic information system
Norman B. Bliss, William U. Reybold
1987, Conference Paper, International Geographic Information Systems (IGIS) Symposium: The research agenda
No abstract available....
