The mobilization of aluminum in a natural soil system: Effects of hydrologic pathways
Isabelle M. Cozzarelli, Janet S. Herman, Roderic A. Parnell Jr.
1987, Water Resources Research (23) 859-874
A two-component soil water flow model was used in conjunction with an equilibrium speciation model WATEQF to study aluminum mobility in soils of a forested watershed, White Oak Run, in the Shenandoah National Park, Virginia. Soil solution samples, taken from the O, E, B, C1, and C2horizons, were collected from...
Processes and kinetics of Cd2+ sorption by a calcareous aquifer sand
C. C. Fuller, J.A. Davis
1987, Geochimica et Cosmochimica Acta (51) 1491-1502
The rate of Cd2+ sorption by a calcareous aquifer sand was characterized by two reaction steps, with the first step reaching completion in 24 hours. The second step proceeded at a slow and nearly constant rate for at least seven days. The first step includes a fast adsorption reaction which...
Recognition of Macluritella (Gastropoda) from the Upper Cambrian of Missouri and Nevada
E. L. Yochelson, B.L. Stinchcomb
1987, Journal of Paleontology (61) 56-61
Open-coiled euomphalacean gastropods have been identified for the first time in the Upper Cambrian Eminence Dolomite of Missouri. These gastropods have a triangular whorl profile and are conspecific with Hyolithes walcotti described from the Upper Cambrian of Nevada. That species is questionably reassigned to the gastropod genus Macluritella,...
Localized sudden changes in the geomagnetic secular variation.
L.R. Alldredge
1987, Journal of Geomagnetism & Geoelectricity (39) 111-118
There is much debate as to whether there was a worldwide geomagnetic jerk in 1969 or 1970. It is agreed that there was an unusual sharp change in the secular variation in the east component, Y, in Europe at that time. This note points out how a localized sudden change...
A Bohemian-type Silurian (Wenlockian) pelecypod faunule from Arctic Canada
J. Pojeta Jr., B.S. Norford
1987, Journal of Paleontology (61) 508-520
The pelecypod genera Slava and Rhombopteria are reported for the first time from Canada, where they occur in a limestone concretion within the Cape Phillips Formation, Cornwallis Island, Arctic Archipelago. These genera are characteristic of Silurian rocks in Bohemia, Czechoslovakia. Graptolites from the same concretion indicate the Monograptus ludensis Zone...
SAND SOURCES FOR THE TRANSGRESSIVE BARRIER COAST OF LONG ISLAND, NEW YORK: EVIDENCE FOR LANDWARD TRANSPORT OF SHELF SEDIMENTS.
S.J. Williams, E.P. Meisburger
1987, Conference Paper
During investigations of the regional geologic framework of Long Island shelf by means of seismic-reflection profiles and cores, Williams (1976) identified a rather limited area on the shelf off Jones Beach where Upper Cretaceous or early Tertiary age glauconite-rich lithosomes subcrop at the seabed, seaward of the shoreface. A suite...
Basement thrust sheets in the Clearwater orogenic zone, central Idaho and western Montana
B. Skipp
1987, Geology (15) 220-224
The Clearwater orogenic zone in central Idaho and western Montana contains at least two major northeast-directed Cordilleran thrust plates of Early Proterozoic metasedimentary and metaigneous rocks that overrode previously folded Middle Proterozoic rocks of the Belt basin in Cretaceous time. The northeastward migration...
New U/Pb Ages from Granite and Granite Gneiss in the Ruby Geanticline and Southern Brooks Range, Alaska
W. W. Patton Jr., T. W. Stern, Joseph G. Arth, C. Carlson
1987, Journal of Geology (95) 118-126
New U/Pb zircon ages from the Ray Mountains of central Alaska clarify the plutonic history of the Ruby geanticline and support earlier suggestions that the Ruby geanticline and S Brooks Range were once parts of the same tectonostratigraphic terrane. U/Pb zircon ages of 109 to 112 Ma from the Ray...
Geological hazards: programs and research in the USA
J.R. Filson
1987, Episodes (10) 292-295
Geological hazards have been studied for centuries, but government support of research to lessen their effects is relatively new. This article briefly describes government programs and research under way in the U.S.A. that are directed towards reducing losses of life and property from earthquakes, volcanic eruptions and landslides. -Author...
Modes of development of slope canyons and their relation to channel and levee features on the Ebro sediment apron, off-shore northeastern Spain
S. O'Connell, William B. F. Ryan, W. R. Normark
1987, Marine and Petroleum Geology (4)
Six submarine slope canyons in an area of the northwestern Mediterranean, offshore from the Ebro River and Delta, were surveyed with bathymetric swathmapping (SeaBeam) and mid-range side-looking sonar (SeaMARC I). All of the canyons have slightly winding paths with concave-upwards gradients that are relatively steep shallower than 1,200 m. Two...
Fluorescence spectral analysis of resinite macerals from coals of the Hanna Formation, Wyoming, U.S.A.
S.C. Teerman, J.C. Crelling, G.B. Glass
1987, International Journal of Coal Geology (7) 315-334
Flourescence spectral analysis indicates that resinite macerals from Tertiary Hanna Formation coals (Hanna Coal Field, southcentral Wyoming, U.S.A.) can be separated into five distinct groups. The first resinite group fluoresces a a medium green (in blue light); its average spectral maximum...
ESTIMATION OF NAVIGATION - DAM DISCHARGE IN ILLINOIS.
Linda S. Weiss
1987, Conference Paper
Techniques were used to estimate discharge for the Brandon Road Dam on the Des Plaines River and the Dresden Island, Marseilles, and Starved Rock Dams on the Illinois River in northern Illinois. Tainter gates are operated to regulate streamflow at all dams. Additionally, headgates are used for regulation of the...
EFFECTS OF LAND SUBSIDENCE ON FLOOD PROFILES.
M. N. Landers
1987, Conference Paper
In this study, the effects of land subsidence on water-surface elevation and depth profiles during flood conditions were investigated for a large, hypothetical, slope-controlled stream. Subsidence depressions, with a range of vertical magnitudes and areas were imposed on a hypothetical stream reach. Step-backwater computations were made to determine water-surface and...
Origin of coffinite in sedimentary rocks by a sequential adsorption-reduction mechanism.
Martin B. Goldhaber, B. S. Hemingway, A. Mohagheghi, R. L. Reynolds, H. R. Northrop
1987, Bulletin de Mineralogie (110) 131-144
Coffinite is the dominant ore mineral in the V-U ores of the Tony-M mine in the Henry Mts mineral belt of the Colorado Plateau. This orebody was formed at a density-stratified solution interface between uranyl-ion-bearing meteoric water and a saline fluid which was locally reducing. The localization of U at...
Benthic foraminifera of the Panamanian Province: distribution and origins.
R.W. Crouch, C. W. Poag
1987, Journal of Foraminiferal Research (17) 153-176
Two hundred twenty-nine species of benthic foraminifera have been identified from 96 stations representing 33 localities on the eastern Pacific inner continental shelf, ranging from southern Peru to northern Baja California. Their distributions mark nearshore provincial boundaries that are nearly identical with those previously documented from the distribution of ostracodes...
The Upper Paleozoic pebbly mudstone facies of peninsular Thailand and western Malaysia - Continental margin deposits of Palaeoeurasia - Discussion
P.H. Stauffer, L.C. Peng
1987, Geologische Rundschau (76) 945-948
[No abstract available]...
New perspectives on the eruption of 1912 in the valley of ten thousand smokes, Katmai National Park, Alaska
W. Hildreth
1987, Bulletin of Volcanology (49) 680-693
New data extend our understanding of the 1912 eruption, its backfilled vent complex at Novarupta, and magma-storage systems beneath adjacent stratovolcanoes. Initial Plinian rhyolite fallout is confined to a narrow downwind sector, and its maximum thickness may occur as far as 13 km from source. In contrast, the partly contemporaneous...
Sources and flux of natural gases from Mono Lake, California
Ronald S. Oremland, L.G. Miller, Michael J. Whiticar
1987, Geochimica et Cosmochimica Acta (51) 2915-2929
The ability to identify a formation mechanism for natural gas in a particular environment requires consideration of several geochemical factors when there are multiple sources present. Four primary sources of methane have been identified in Mono Lake. Two of these sources were associated with numerous natural gas seeps which...
Near infrared detection of ammonium minerals
M. D. Krohn, S. P. Altaner
1987, Geophysics (52) 924-930
Diagnostic near-infrared spectral features have been identified for minerals with ammonium (NH (super +) 4 ) bound in the crystal structure. Spectral bands near 2.12, 2.02, and 1.56 mu m are characteristic of synthetic and natural NH 4 -bearing minerals. Laboratory spectra of NH 4 -bearing minerals are distinct from spectra of OH-bearing minerals and have...
Hydrogeological concepts in the United States: a historical perspective.
J.E. Moore, B.B. Hanshaw
1987, Episodes (10) 315-321
Reviews the development of hydrogeological concepts in the USA from 1879 to 1987, from early qualitative reconnaissance investigations to modern qualitative and multi-disciplinary studies involving predictive analytical techniques and a consideration of management practices. The authors present a sampling of historical milestone papers in US hydrology in the form of...
Evidence for Late-Paleozoic brine migration in Cambrian carbonate rocks of the central and southern Appalachians: Implications for Mississippi Valley-type sulfide mineralization
P.P. Hearn Jr., J. F. Sutter, H. E. Belkin
1987, Geochimica et Cosmochimica Acta (51) 1323-1334
Many Lower Paleozoic limestones and dolostones in the Valley and Ridge province of the central and southern Appalachians contain 10 to 25 weight percent authigenic potassium feldspar. This was considered to be a product of early diagenesis, however, 40Ar39Ar">40Ar39Ar analyses of overgrowths on detrital K-feldspar in...
Origin of the lethal gas burst from Lake Monoun, Cameroun
Haraldur Sigurdsson, J.D. Devine, F.M. Tchua, F.M. Presser, M.K.W. Pringle, William C. Evans
1987, Journal of Volcanology and Geothermal Research (31) 1-16
On 15 August, 1984, a lethal gas burst issued from a submerged 96-m-deep crater in Lake Monoun in Cameroun, western Africa, killing 37 people. The event was associated with a landslide from the eastern crater rim, which slumped into deep water. Waters below 50 m are anoxic, dominated by high...
Wind energy development in California, USA
H. Wilshire, D. Prose
1987, Environmental Management (11) 13-20
Windfarms have been developed rapidly in California in the last few years. The impetus has been a legislated goal to generate 10% of California's electricity by windpower by the year 2000, and generous state and federal tax incentives. Windpower is promoted as environmentally benign, which it is in traditional uses....
DISTRIBUTED GROUND-WATER DATA BASE OF THE U. S. G. S.
Richard R. Luckey
1987, Conference Paper
During the past 20 years, the ground-water data base of the U. S. Geological Survey has evolved from paper files in local offices, to a national data base on a central mainframe computer, to a distributed data base on a network of 49 minicomputers throughout the United States. Users in...
Characteristics of hydrolysis of the complex Na2SnF6 in hydrothermal solutions-An experimental study
Y. Wang, C. I-Ming
1987, Chinese Journal of Geochemistry (6) 372-382
Characteristics of hydrolysis of the complex Na2SnF6, which is used as the starting material, in hydrothermal solutions have been studied at 200-602??C and 1 kbar. Experimental results show that intense hydrolysis of Na2SnF6 occurs at high temperatures and that with the rise of temperature the hydrolysis will become more intense....
