The heat capacities of osumilite from 298.15 to 1000 K, the thermodynamic properties of two natural chlorites to 500 K, and the thermodynamic properties of petalite to 1800 K.
B. S. Hemingway, R. A. Robie, J.A. Kittrick, E.S. Grew, J.A. Nelen, D. London
1984, American Mineralogist (69) 701-710
Modifications to an automated low-T, adiabatic calorimeter are described. Thermodynamic data obtained with this instrument are reported for minerals from metamorphic terrains. (U.S. Bureau of Mines Report of Investigations 8451)-J.A.Z....
Isotopic evidence for glacial meltwater recharge to the Cambrian-Ordovician aquifer, north-central United States
D. I. Siegel, R.J. Mandle
1984, Quaternary Research (22) 328-335
The chemistry of water in the Cambrian-Ordovician aquifer in six midwestern states has been studied as part of the Northern Midwest Regional Aquifer-System Analysis of the U.S. Geological Survey. Dissolved-solids concentrations generally increase perpendicular to the direction of regional groundwater flow, from less than 400 mg/liter in southeast Minnesota, southwest...
Deformation, geochemistry, and origin of massive sulfide deposits, Gossan lead district, Virginia
J. E. Gair, J. F. Slack
1984, Economic Geology (79) 1483-1520
The Gossan Lead district is a 28-km-long, northeast-trending belt of discontinuous massive sulfide deposits in the Blue Ridge province of southwestern Virginia. The deposits, hosted by the Ashe Formation of late Proterozoic age, consist of strata-bound lenses and layers of massive pyrrhotite, minor chalcopyrite, sphalerite, and pyrite, and rare arsenopyrite...
Geochemistry of tholeiitic and alkalic lavas from the Koolau Range, Oahu, Hawaii: Implications for Hawaiian volcanism
M.F. Roden, F.A. Frey, D.A. Clague
1984, Earth and Planetary Science Letters (69) 141-158
Lavas of the post-erosional, alkalic Honolulu Volcanics have significantly lower 87Sr/86Sr and higher 143Nd/144Nd than the older and underlying Koolau tholeiites which form the Koolau shield of eastern Oahu, Hawaii. Despite significant compositional variation within lavas forming the Honolulu Volcanics, these lavas are isotopically...
Floods of April 18, 1983 on St. Thomas and St. John, U.S. Virgin Islands
R. E. Curtis Jr.
1984, Water-Resources Investigations Report 84-4184
The U.S. Virgin Islands of St. Thomas and St. John experienced the most intense rainfall event in recorded history on April 18, 1983. Rainfall intensities of 2.5 inches per hour, and more than 16 inches in 18 hours were recorded. Almost instantaneous runoff caused widespread flooding near the coastlines of...
Long-term observations of bottom conditions and sediment movement on the Atlantic continental shelf; time-lapse photography from instrumented tripod
Bradford Butman, Cynthia G. Bryden, Stephanie L. Pfirman, William J. Strahle, Marlene A. Noble
1984, Conference Paper
An instrument system that measures bottom current, temperature, light transmission, and pressure, and that photographs the bottom at 2- to 6-hour intervals has been developed to study sediment transport on the Atlantic Continental Shelf. Instruments have been deployed extensively along the United States East Coast Continental Shelf for periods of...
Analysis of trace metals in water by inductively coupled plasma emission spectrometry using sodium dibenzyldithiocarbamate for preconcentration
C. L. Smith, Jerry M. Motooka, W. R. Willson
1984, Analytical Letters (17) 1715-1730
Since concentrations of trace elements in most natural waters seldom exceed the μg/L level, analysis of trace elements in natural waters by inductively coupled plasma emission spectrometry (ICP) requires a preconcentration procedure. The elements Ag, Bi, Cd, Co, Cu, Fe, Mo, Ni, Pb, Sn, V, W, and Zn were separated...
CHARACTERIZATION OF SECONDARY ALTERATION IN THE COLUMBIA RIVER BASALT BY BACKSCATTERED ELECTRON IMAGING AND ENERGY-DISPERSIVE X-RAY SPECTROSCOPY.
P.P. Hearn, W.C. Steinkampf, Z. A. Brown
Romig Alton D.Jr.Goldstein Joseph I., editor(s)
1984, Conference Paper, Proceedings, Annual Conference - Microbeam Analysis Society
The thick sequences of flood basalts which underlie the Columbia River basin are important aquifiers, providing water for both agricultural and domestic use. Secondary alteration in these rocks occurs primarily as coatings or fillings in fractures and vesicles; alteration is generally believed to have occurred at low temperatures ( less...
Evolution of the yardangs at Rogers Lake, California
A. W. Ward, R. Greeley
1984, Geological Society of America Bulletin (95) 829-837
Yardangs are streamlined, wind-eroded hills common to most deserts. Yardangs at Rogers Lake, Mojave Desert, California, have streamlined forms characteristic of objects eroded by moving fluids, a teardrop shape that approaches an ideal 1:4 width-to-length ratio. In wind-tunnel simulations, miniature forms of various...
Spectral properties of ice‐particulate mixtures and implications for remote sensing: 1. Intimate mixtures
Roger N. Clark, Paul G. Lucey
1984, Journal of Geophysical Research: Solid Earth (89) 6341-6348
The spectral properties of water ice-particulate mixtures are studied for the purpose of deriving the ice and particulate abundances from remotely obtained spectra (particulates referring to nonicy materials in the form of grains). Reflectance levels and ice absorption band depths are a complex function of the single scattering albedo of...
LASER MICROPROBE **4**0Ar/**3**9Ar DATING OF MINERAL GRAINS IN SITU.
J. F. Sutter, Jack B. Hartung
1984, Scanning Electron Microscopy 1525-1529
A laser-microprobe attached to a mass spectrometer for **4**0Ar/**3**9Ar age determination of single mineral grains in geological materials has been made operational at the US Geological Survey, Reston, VA. This microanalytical technique involves focusing a pulsed laser beam onto a sample contained in an ultra-high vacuum chamber attached to a...
New data for iimoriite.
E.E. Foord, M.H. Staatz, N. M. Conklin
1984, American Mineralogist (69) 196-199
In its first reported occurrence outside of Japan, iimoriite, Y2(SiO4)(CO3), has been found in a thorite- and uraninite-bearing quartz and albite vein from Bokan Mountain on Prince of Wales Island, Alaska. It occurs as buff-tan subhedral and anhedral grains, 0.01-0.5 mm in diameter, with vitreous lustre, white streak, and H....
Mineral resources of the Tracy Arm-Fords Terror Wilderness Study Area and vicinity, Alaska
Water Resources Division, U.S. Geological Survey
1984, Bulletin 1525
No abstract available....
GIRAS TO MOSS INTERFACE.
Thomas P. DiNardo, R. Alan Jackson
1984, Conference Paper
An analysis of land use change for an area in Boulder County, Colorado, was conducted using digital cartographic data. The authors selected data in the Geographic Information Retrieval and Analysis System (GIRAS) format which is digitized from the 1:250,000-scale land use and land cover map series. The Map Overlay and...
Mantle metasomatism: The REE story
H. G. Wilshire
1984, Geology (12) 395-398
Refractory rocks with light REE/heavy REE ratios greater than chondrite are common as xenoliths in basalts and kimberlites and are found in some oceanic peridotite massifs. This has led to the supposition that large parts of the upper mantle have been metasomatically altered...
Accelerator radiocarbon dating of evidence for prehistoric horticulture in Illinois
N. Conard, D.L. Asch, N.B. Asch, D. Elmore, H. Gove, M. Rubin, J.A. Brown, M.D. Wiant, K.B. Farnsworth, T.G. Cook
1984, Nature (308) 443-446
With the development of direct detection radiocarbon dating, which uses an accelerator as part of a highly selective mass spectrometer, it is now possible to determine the age of milligram samples of organic materials1-5. One application of accelerator dating is in evaluating scanty, sometimes controversial evidence for early horticulture throughout...
Applied cartographic communication: map symbolization for atlases.
J. L. Morrison
1984, Cartographica: The International Journal for Geographic Information and Geovisualization (21) 44-84
A detailed investigation of the symbolization used on general-purpose atlas reference maps. It indicates how theories of cartographic communication can be put into practice. Two major points emerge. First, that a logical scheme can be constructed from existing cartographic research and applied to an analysis of the choice of symbolization...
The Piedmont landscape of Maryland: a new look at an old problem.
J. E. Costa, E.T. Cleaves
1984, Earth Surface Processes and Landforms (9) 59-74
Both equilibrium and episodic erosion features can be recognized in the modern landscape. An equilibrium condition is suggested by adjustment of first and second order streams to rock structure and lithology, entrenchment of some streams against gneiss domes, altitudinal zonation of rock types around gneiss domes, correlation of lithology with...
Proton and metal ion binding to natural organic polyelectrolytes—II. Preliminary investigation with a peat and a humic acid
J.A. Marinsky, M.M. Reddy
1984, Organic Geochemistry (7) 215-221
We summarize here experimental studies of proton and metal ion binding to a peat and a humic acid. Data analysis is based on a unified physico-chemical model for reaction of simple ions with polyelectrolytes employing a modified Henderson-Hasselbalch equation. Peat exhibited an apparent intrinsic acid dissociation constant of 10−4.05, and...
Elk and deer diets in old-growth forests in western Washington
David M. Leslie Jr., Edward E. Starkey, Martin Vavra
1984, Journal of Wildlife Management (48) 762-775
Dietary quality and overlap of sympatric Roosevelt elk (Cervus elaphus roosevelti) and Columbian black-tailed deer (Odocoileus hemionus columbianus) were investigated in old-growth forests of the Hoh Valley, Olympic National Park, Washington. Diets of both cervids were comprised mainly of common old-growth flora, particularly in winter. High dietary overlap suggested competitive...
A Model of Regional Ground-Water Flow in Secondary-Permeability Terrane
J. M. Gerhart
1984, Groundwater (22) 168-175
The ground-water flow system in the Lower Susquehanna River Basin in Pennsylvania and Maryland can be considered as one complex unconfined aquifer in which secondary porosity and permeability are the dominant influences on the occurrence and flow of ground water. The degree of development of...
Wildlife census in the southern Cottonwood Mountains, Death Valley National Monument I
C. L. Douglas, P.G. Sanchez
1984, Technical Report CPSU/UNLV 006/30
No abstract available at this time...
Current impact of DDE on black-crowned night-herons in the intermountain west
Charles J. Henny, Lawrence J. Blus, Alexander J. Krynitsky, Christine M. Bunck
1984, Journal of Wildlife Management (48) 1-13
Organochlorine contamination was studied in eight black-crowned night-heron (Nycticorax nycticorax) populations nesting in Washington, Oregon, and Nevada in 1978-80. DDE was detected in 220 eggs sampled; eggshell thickness was negatively correlated with residues of DDE and polychlorinated biphenyls (PCB's). Other contaminants were detected in 35% or fewer of the eggs....
Preliminary map showing the difference between the potentiometric surfaces of the Aquia aquifer of April 1979 and September 1982 in southern Maryland
F. K. Mack, J. C. Wheeler, S. E. Curtin
1984, Open-File Report 83-930
A map was prepared that shows the net change in the potentiometric surface of the Aquia aquifer in southern Maryland between April 1979 and September 1983. During this period, the potentiometric surface declined (1) at least a few feet throughout the entire southern Maryland area, and (2) more than 10...
Deformation of clinopyroxenite: Evidence for a transition in flow mechanisms and semibrittle behavior
S. H. Kirby, A. K. Kronenberg
1984, Journal of Geophysical Research Solid Earth (89) 3177-3192
A systematic suite of constant strain rate experiments was performed on a vacuum-dried, high-purity, fine-grained clinopyroxenite using NaCl and NaF as confining media in a Griggs-type piston-cylinder apparatus. The experiments were carried out over a range of temperatures from 400° to 1100°C, strain rates from 10−3 to 10−7 s−1, and confining pressures...
