Mineral resources of the East Fork High Rock Canyon Wilderness Study Area, Washoe and Humboldt counties, Nevada
Jay A. Ach, Donald Plouff, R. L. Turner, S. W. Schmauch
1987, Bulletin 1707-B
The part of the East Fork High Rock Canyon Wilderness Study Area (CA-020-914/NV-020-006A) included in this study encompasses 33,460 acres in the northwestern part of Nevada. Throughout this report, "wilderness study area" and "study area" refertothe 33,460 acres for which mineral surveys were requested. The U.S. Geological Survey and the...
Water-level maps of the alluvial aquifer in eastern Arkansas, 1985
Maria Plafcan, D.T. Fugitt
1987, Water-Resources Investigations Report 86-4178
Maps shown in this report show the potentiometric surface of the alluvial aquifer before and after the pumping season of 1985, the depth-to-water in the spring of 1985, and the change in water levels between the spring of 1980 and the spring of 1985. Hydrographs showing long-term water-level changes in...
Chart showing lithology, mineralogy, and paleontology of the nonmarine North Horn Formation and Flagstaff Member of the Green River Formation, Price Canyon, central Utah: a principal reference section
T. D. Fouch, J.H. Hanley, R. M. Forester, C. W. Keighin, Janet K. Pitman, D. J. Nichols
1987, IMAP 1797-A
No abstract available....
Regional study of the Castle Hayne Aquifer of eastern North Carolina
W.L. Lyke, R. W. Coble
1987, Open-File Report 87-571
The Castle Hayne aquifer is an eastward sloping and thickening wedge of limestone and sandstone, located in a 12,500 sq mi area in the eastern part of North Carolina. The Castle Hayne aquifer is the major source of freshwater for much of coastal North Carolina where the aquifers underlying the...
Alleghanian deformation, metamorphism, and granite emplacement in the central Piedmont of the southern Appalachians
J. Wright Horton, Jr., J. F. Sutter, T. W. Stern, D.J. Milton
1987, American Journal of Science (287) 635-660
Evidence of late Paleozoic (Alleghanian) penetrative deformation, amphilbolite-facies, metamorphism, and syntectonic granite emplacement has been found in an area of the central Piedmont in the southern Appalachians. The High Shoals Granite batholith in the Kings Mountain belt of south-central North Carolina consists of coarse-grained, megacrystic biotite granite with a strong,...
Trip C; Structure and stratigraphy above, below, and within the Taconic unconformity, southeastern New York
Jack B. Epstein, Peter T. Lyttle
1987, Conference Paper, Guidebook - New York State Geological Association, Meeting, 1987
No abstract available....
Late Quaternary caldera-forming eruptions in the eastern Aleutian arc, Alaska
T. P. Miller, R.L. Smith
1987, Geology (15) 434-438
Late Quaternary calderas have been identified at 12 of 40 volcanic centers in the eastern Aleutian arc, and sufficient radiocarbon dates and geologic information have now been obtained to either date or constrain the timing of the climactic caldera-forming eruptions. At least eight major caldera-forming events, each characterized by estimated...
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...
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...
Preliminary results from a study of natural slope failures triggered by the storm of November 3.5.1985, Germany Valley, West Virginia and Virginia: Chapter 4 in Landslides of eastern North America
Robert B. Jacobson, Elizabeth D. Cron, John P. McGeehin
1987, Circular 1008-4
During the first five days of November 1985, a low-pressure system in the Ohio River valley combined with a low-pressure system referred to as Tropical Storm Juan to produce heavy rainfall in the Potomac, James, and Rappahannock River basins. Severe flooding accompanied the rainfall; 43 lives were lost and the...
Colorado Plateau
William L. Graf, Richard Hereford, Julie Laity, Richard A. Young
1987, Book chapter, Geomorphic systems of North America
Field studies in the Colorado Plateau occupy an honored place in the development of geomorphic theory. The purpose of this chapter is to briefly review the foundational, regional, and process-oriented studies in the region, and to provide a review of promising threads of inquiry set in a context of more...
Geology of the Mount St. Helens area: Record of discontinuous volcanic and plutonic activity in the Cascade Arc of southern Washington
Russell C. Evarts, Roger P. Ashley, J.G. Smith
1987, Journal of Geophysical Research B: Solid Earth (92) 10155-10169
The Quaternary edifice of Mount St. Helens volcano was built upon a deeply eroded terrane of gently folded and altered volcanic and plutonic rocks that represent the core of the Tertiary Cascade magmatic arc. These rocks constitute an east dipping homoclinal sequence, several kilometers thick, of subaerially erupted mafic to...
Synopsis of wetland functions and values: bottomland hardwoods with special emphasis on eastern Texas and Oklahoma
D.L. Wilkinson, K. Schneller-McDonald, R.W. Olson, G.T. Auble
1987, Report, Biological Report
Bottomland hardwood wetlands are the natural cover type of many floodplain ecosystems in the southeastern United States. They are dynamic, productive systems that depend on intermittent flooding and moving water for maintenance of structure and function. Many of the diverse functions performed by bottomland hardwoods (e.g., flood control, sediment trapping,...
On the aftershock sequence of the earthquake of January 31, 1986 in northeastern Ohio; effects of bandwidth and local geology on observed high-frequency ground motion
Roger D. Borcherdt, G. Glassmoyer
1987, Conference Paper, Earthquake ground motion estimation in eastern North America proceedings
No abstract available....
Lead isotopic fingerprinting of tectono-stratigraphic terranes, east-central Alaska
John N. Aleinikoff, Cynthia Dusel-Bacon, Helen Laura Foster, Warren J. Nokleberg
1987, Canadian Journal of Earth Sciences (24) 2089-2098
Common lead isotopic compositions have been determined on feldspars from meta-igneous rocks from nine tectono-stratigraphic terranes or subterranes in east-central Alaska. Most of the terranes have distinct and well-defined signatures in terms of isotopic composition; thus, most can be distinguished on conventional...
Variation of wet deposition chemistry in Sequoia National Park, California
Thomas J. Stohlgren, David J. Parsons
1987, Atmospheric Environment (21) 1369-1374
Sequoia National Park has monitored wet deposition chemistry in conjunction with the National Atmospheric Deposition Program and National Trends Network (NADP/NTN), on a weekly basis since July, 1980. Annual deposition of H, NO3 and SO4 (0.045, 3.6, and 3.9 kg ha−1 a−1, respectively) is relatively low compared to that measured...
Gulf trough: The Atlantic connection
Peter Popenoe, Vernon J. Henry, Faisal M. Idris
1987, Geology (15) 327-332
Analyses of seismic reflection profiles and stratigraphic data indicate a continuation of the Gulf trough trend across eastern South Carolina and offshore between Cape Fear and Cape Hatteras, North Carolina. Seismic profiles show a linear northeast-trending zone of nondeposition and erosion and areas...
Accounts describing the Mississippi Valley Earthquakes of 1811-12
1987, Earthquakes & Volcanoes (USGS) (19) 212-217
At 2:15 a.m. on December 16, 1811, a unique sequence of earthquakes began in what is today southeast Missouri and northeast Arkansas. Although the area was sparsely populated,the earthquakes, generally referred to as the New Madrid earthquakes, were felt throughout a wide area if the Central and Eastern United States....
Resurrection Peninsula and Knight Island ophiolites and recent faulting on Montague Island, southern Alaska
Steven W. Nelson, Marti L. Miller, Julie A. Dumoulin
1987, Book chapter, Cordilleran section of the Geological Society of America: Centennial Field Guide volume 1
The Resurrection Peninsula forms the east side of Resurrection Bay (Fig. 1). The city of Seward is located at the head of the bay and can be reached from Anchorage by highway (127 mi;204 km). Relief ranges from 1,434 ft (437 m) at the southern end of the peninsula...
Did the 1982-1983 El Niño-Southern Oscillation Affect Seabirds in Alaska?
Scott A. Hatch
1987, The Wilson Bulletin (99) 468-474
The causes and effects of the oceanographic and atmospheric phenomena known as El Nino and the Southern Oscillation (ENSO) have been studied intensively in recent years (Cane 1983, Rasmusson and Wallace 1983, Barber and Chave 1983, Cane and Zebiak 1985). ENSOs occur at semiregular intervals of 3-4 years, and the...
Ground-water flow and shallow-aquifer properties in the Rio Grande inner valley south of Albuquerque, Bernalillo County, New Mexico
K. D. Peter
1987, Water-Resources Investigations Report 87-4015
The purpose of this investigation was to describe the water table configuration and its temporal variations, estimate aquifer properties, and evaluate the interaction of groundwater and surface water in the inner valley of the Rio Grande in southern Albuquerque, New Mexico, where groundwater contamination is a continuing concern. The upper...
Geology and hydrology of the deep bedrock aquifers in eastern Colorado
S. G. Robson, E. R. Banta
1987, Water-Resources Investigations Report 85-4240
Deep bedrock aquifers are present in rocks of Cretaceous through Pennsylvanian age in eastern Colorado. These aquifers are the Laramie-Fox Hills (the uppermost aquifer studied), Fort Hays-Codell, Dakota-Cheyenne, Entrada-Dockum, Lyons, and Fountain. Structural mapping indicates the aquifers are 2,000 to 9,000 ft below land surface in most of eastern Colorado...
Character and distribution of borehole breakouts and their relationship to in situ stresses in deep Columbia River basalts
Frederick L. Paillet, K. Kim
1987, Journal of Geophysical Research Solid Earth (92) 6223-6234
The character and distribution of borehole breakouts in deeply buried basalts at the Hanford Site in south central Washington State are examined in light of stress indicator data and hydraulic-fracturing stress data by means of acoustic televiewer and acoustic waveform logging systems. A series of boreholes penetrating the Grande Ronde...
Geology and origin of the Death Valley uranium deposit, Seward Peninsula, Alaska
Kendell A. Dickinson, Kenneth D. Cunningham, Thomas A. Ager
1987, Economic Geology (82) 1558-1574
A uranium deposit discovered in 1977 in western Alaska, by means of airborne radiometric data, is the largest known in Alaska on the basis of industry reserve estimates. At about latitude 65 degrees N, it is the most northerly known sandstone-type uranium deposit in the world. The deposit lies in...
