Regional method to assess offshore slope stability.
H.J. Lee, B. D. Edwards
1986, Journal of Geotechnical Engineering (112) 489-509
The slope stability of some offshore environments can be evaluated by using only conventional acoustic profiling and short-core sampling, followed by laboratory consolidation and strength testing. The test results are synthesized by using normalized-parameter techniques. The normalized data are then used to calculate the critical earthquake acceleration factors or the...
Secretinite: A proposed new maceral of the inertinite maceral group
P.C. Lyons, Patrick G. Hatcher, F. W. Brown
1986, Fuel (65) 1094-1098
The new maceral secritinite (name derived from the word ‘secretory’) is proposed for subcircular, ovoid, crescent-shaped or oblong, commonly round on one or more sides, noncellular, highly reflective components of the inertinite maceral group. This maceral of secretory origin, known from many bituminous coals throughout the world, has been confused...
Applications of Landsat data and the data base approach
D. T. Lauer
1986, Photogrammetric Engineering and Remote Sensing (52) 1193-1199
A generalized methodology for applying digital Landsat data to resource inventory and assessment tasks is currently being used by several bureaux and agencies within the US Department of the Interior. The methodology includes definition of project objectives and output, identification of source materials, construction of the digital data base, performance...
Coincidence and spatial variability of geology, soils, and vegetation, Mill Run watershed, Virginia
C.G. Olson, C.R. Hupp
1986, Earth Surface Processes and Landforms (11) 619-629
The Mill Run watershed is a structurally‐controlled synclinal basin on the eastern limb of the Massanutten Mountain complex of northwestern Virginia. Bedrock contacts are obscured by coarse sandstone debris from exposures near basin divides. Colluvium blankets more than half the basin, masking geomorphic surfaces, affecting vegetation...
Movement and fate of detergents in groundwater: A field study
E.M. Thurman, L.B. Barber Jr., D. LeBlanc
1986, Journal of Contaminant Hydrology (1) 143-161
The major cations, anions, and detergents in a plume of contaminated groundwater at Otis Air Base on Cape Cod (Mass., U.S.A.) have moved approximately 3.5 km down gradient from the disposal beds. We hypothesize that the detergents form two distinct plumes, which consist of alkyl benzene sulfonates (ABS) detergents and...
Estimation of distributional parameters for censored trace level water quality data: 2. Verification and applications
Dennis R. Helsel, Robert J. Gilliom
1986, Water Resources Research (22) 147-155
Estimates of distributional parameters (mean, standard deviation, median, interquartile range) are often desired for data sets containing censored observations. Eight methods for estimating these parameters have been evaluated by R. J. Gilliom and D. R. Helsel (this issue) using Monte Carlo simulations. To verify those findings, the same methods are...
Effect of height and orientation ( microclimate) on geomorphic degradation rates and processes, late-glacial terrace scarps in central Idaho
K. L. Pierce, Steven M. Colman
1986, Geological Society of America Bulletin (97) 869-885
Terrace scarps can serve as a nearly ideal natural laboratory for the study of the evolution of slopes. This paper examines the effects of scarp size (height) and orientation (microclimate) by keeping constant variables such as age, lithology, and regional climate.If a scarp degrades as a closed system, and downslope...
Summary of pre-1980 tephra-fall deposits erupted from Mount St. Helens, Washington State, USA
D. R. Mullineaux
1986, Bulletin of Volcanology (48) 17-26
Mount St. Helens has been a prolific source of tephra-fall deposits for about 40 000 years. These tephra deposits (1) record numerous explosive eruptions, (2) form important regional time-stratigraphic marker beds, and (3) record repeated changes in composition within and between eruptive periods. Recognized tephra strata record more than 100...
Determination of total, commonality, and uniqueness of interpreted structural elements from remotely sensed data in Alaska
G.H. Rosenfield
1986, Mathematical Geology (18) 161-179
Statistical analysis is conducted to determine the unique value of real- and synthetic-aperture side-looking airborne radar (SLAR) to detect interpreted structural elements. SLAR images were compared to standard and digitally enhanced Landsat multispectral scanner (MSS) images and to aerial photographs. After interpretation of the imagery, data were cumulated by total...
Effect of discharge on the chlorophyll a distribution in the tidally-influenced Potomac River
J. P. Bennett, J.W. Woodward, D.J. Shultz
1986, Estuaries (9) 250-260
In the tidal Potomac River, high river discharges during the spring are associated with high chlorophylla concentrations in the following in the following summer, assuming that summertime light and temperature conditions are favorable. Spring floods deliver large loads of particulate N and P to the tidal river. This particulate N and...
CONCEPTUAL DESIGN OF THE SURFACE WATER COMPONENT OF THE NATIONAL WATER QUALITY ASSESSMENT (NAWQA) PROGRAM.
Robert M. Hirsch
1986, Conference Paper, Oceans Conference Record (IEEE)
The US Geological Survey started, in a pilot phase, a program to provide nationally consistent information on the status and trends in the quality of the nation's fresh water. The program also intends to identify and describe the relationships between both the status and trends in water quality as they...
AIRBORNE INERTIAL SURVEYING USING LASER TRACKING AND PROFILING TECHNIQUES.
Edward J. Cyran
Menzies Robert T., editor(s)
1986, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The U. S. Geological Survey through a contract with the Charles Stark Draper Laboratory has developed the Aerial Profiling of Terrain System. This is an airborne inertial surveying system designed to use a laser tracker to provide position and velocity updates, and a laser profiler to measure terrain elevations. The...
Nd, O and Sr isotopic constraints on the origin of Precambrian rocks, southern Black Hills, South Dakota
R.J. Walker, G. N. Hanson, J. J. Papike, J. R. O’Neil
1986, Geochimica et Cosmochimica Acta (50) 2833-2846
The Nd, O and Sr isotopic characteristics of Precambrian metasedimentary, metavolcanic and granitic rocks from the Black Hills of South Dakota are examined. Two late-Archean granites (2.5-2.6 Ga) have Tdm ages of 3.05 and 3.30 Ga, suggesting that at least one of the granites was derived through the melting of significantly...
New aromatic biomarkers and possible maturity indicators found in New Albany Shale extracts
I.-M. Chou, K.V. Wood
1986, Organic Geochemistry (9) 351-356
Aromatic hydrocarbons from benzene extracts of New Albany Shale were characterized. A biomarker that has a molecular weight of 546 and a structural configuration consistent with that of an alkyl-aromatic hydrocarbon (C40H66) was tentatively identified. It was found that the relative concentrations of the biomarker are indicative of differing levels...
Transient electromagnetic sounding for groundwater
David V. Fitterman, Mark T. Stewart
1986, Geophysics (51) 995-1005
The feasibility of using the transient electromagnetic sounding (TS or TDEM) method for groundwater exploration can be studied by means of numerical models. As examples of its applicability to groundwater exploration, we study four groundwater exploration problems: (1) mapping of alluvial fill and gravel zones over bedrock; (2) mapping of...
Palynological evidence for the historic expansion of juniper and desert shrubs in Arizona, U.S.A.
O.K. Davis, R. M. Turner
1986, Review of Palaeobotany and Palynology (49) 177-193
Analysis of the sediment of Pecks Lake, Yavapai County, Arizona, has permitted the first reported palynological evidence for the historic expansion of juniper and desert shrubs in the American Southwest. The palynological evidence is supported by the comparison of modern and historical photographs, which shows the regional expansion of pinyon-juniper...
Middle Devonian to Late Mississippian event stratigraphy of Overthrust belt region, western United States
Charles Sandberg, R.C. Gutschick, J.G. Johnson, F. G. Poole, W.J. Sando
1986, Annales - Societe Geologique de Belgique (109) 205-207
Twenty eustatic and epeirogenic events mainly dated by conodonts are distinguished between the Middle Devonian and the lower Upper Mississippian in Great Basin, in Rocky Mountains and in the Overthrust belt regions....
Use of spawner recruit relations to evaluate the effect of degraded environment and increased fishing on the abundance of fall run Chinook in several California streams
R.R. Reisenbichler
1986, Thesis
No abstract available ...
Geochemical exploration for mineralized breccia pipes in northern Arizona, U.S.A.
K. J. Wenrich
1986, Applied Geochemistry (1) 469-485
Thousands of solution-collapse breccia pipe crop out in the canyons and on the plateaus of northern Arizona. Over 80 of these are known to contain U or Cu mineralized rock. The high-grade U ore associated with potentially economic concentrations of Ag, Pb, Zn, Cu, Co and Ni in some of...
Louisiana hydrologic atlas map no. 2: Areal extent of freshwater in major aquifers of Louisiana
Charles W. Smoot
1986, Water-Resources Investigations Report 86-4150
The areal availability of freshwater (cl content < 250 mg/L) in 14 major aquifers in Louisiana was investigated. The depth of occurrence of fresh groundwater in Louisiana is variable. The aquifers were mapped to show their areal extent from the outcrop or subcrop to the downdip limit of freshwater. Water...
Magnesioferrite from the Cretaceous-Tertiary boundary, Caravaca, Spain
B.F. Bohor, E.E. Foord, R. Ganapathy
1986, Earth and Planetary Science Letters (81) 57-66
Magnesioferrite grading toward magnetite has been identified as a very small but meaningful constituent of the basal iron-rich portion of the Cretaceous-Tertiary (K-T) boundary clay at the Barranco del Gredero section, Caravaca, Spain. This spinel-type phase and others of the spinel group, found in K-T boundary clays at many widely...
Occurrence of white bass-white perch hybrids in Lake Erie
Thomas N. Todd
1986, Copeia (1986) 196-199
No abstract available....
Authors' reply
R.M. Hirsch, N.E. Peters
1986, Atmospheric Environment (20) 230-232
No abstract available....
Spring and summer survival of female mallards from northcentral Minnesota
Ronald E. Kirby, Lewis M. Cowardin
1986, Journal of Wildlife Management (50) 38-43
Seasonal survival of 109 adult female mallards (Anas platyrhynchos) fitted with radio transmitters was evaluated in northcentral Minnesota during 1968-74. Survival rates for the 169-day breeding and postbreeding period were: 1.0 during nest initiation (36 days), 0.798 during incubation (28 days), 0.943 during brood rearing (51 days), 0.947 during molt...
Cambrian nepheline syenite complex at Jabal Sawda, Midyan region, Kingdom of Saudi Arabia
W.K. Liddicoat, C.R. Ramsay, C. E. Hedge
1986, Journal of African Earth Sciences (4) 139-150
The only nepheline syenite complex presently known in the Arabian Shield is at Jabal Sawda, about 30 km S of Haql in the extreme NW of Saudi Arabia. It is a post-tectonic, composite intrusion with a crudely concentric structure. A...
