Aeromagnetic map and analysis of aeromagnetic and aeroradioactivity data in the Blood Mountain, Chattahoochee, and Tray Mountain Roadless Areas, northern Georgia
David L. Daniels
1985, Miscellaneous Field Studies Map 1347-E
The data for the aerornagnetic map of the Blood Mountain, Chattahoochee, and Tray Mountain Roadless Areas and vicinity were compiled from two separate airborne surveys {U.S. Geological Survey, 1977, 1981) produced in cooperation with the State of Georgia. These surveys were flown by fixed - wing aircraft in 1976 and...
Electronic spectra of Fe3+ oxides and oxide hydroxides in the near IR to near UV.
David M. Sherman, T.D. Waite
1985, American Mineralogist (70) 1262-1269
Optical absorption and diffuse reflectance spectra of several Fe2O3 and FeOOH polymorphs (hematite, maghemite, goethite, lepidocrocite) in the near-IR to near-UV spectral regions (2000-200 nm) are presented. The spectra consist primarily of Fe3+ ligand field and ligand-to-metal charge-transfer transitions.-J.A.Z....
The Dunbar Gneiss-granitoid dome: Implications for early Proterozoic tectonic evolution of northern Wisconsin
P.K. Sims, Z. E. Peterman, K. J. Schulz
1985, Geological Society of America Bulletin (96) 1101-1112
The Dunbar dome in northeastern Wisconsin is a critical structural feature in the early Proterozoic Penokean orogen. It provides exposures of gneisses (Dunbar Gneiss) that structurally underlie the voluminous metavolcanic rocks of northeastern Wisconsin, and exposures of abundant granitoid rocks ranging from tonalite...
Analysis of low levels of rare earths by radiochemical neutron activation analysis
G.A. Wandless, J. W. Morgan
1985, Journal of Radioanalytical and Nuclear Chemistry Articles (92) 273-282
A procedure for the radiochemical neutron-activation analysis for the rare earth elements (REE) involves the separation of the REE as a group by rapid ion-exchange methods and determination of yields by reactivation or by energy dispersive X-ray fluorescence (EDXRF) spectrometry. The U. S. Geological Survey (USGS) standard rocks, BCR-1 and...
Anomalous 13C enrichment in modern marine organic carbon
M.A. Arthur, W.E. Dean, George E. Claypool
1985, Nature (315) 216-218
Marine organic carbon is heavier isotopically (13C enriched) than most land-plant or terrestrial organic C1. Accordingly, ??13C values of organic C in modern marine sediments are routinely interpreted in terms of the relative proportions of marine and terrestrial sources of the preserved organic matter2,3. When independent geochemical techniques are used...
Seismic structure and stratigraphy of northern edge of Bahaman-Cuban collision zone
M. M. Ball, R. G. Martin, W. D. Bock, R. E. Sylwester, R. M. Bowles, D. Taylor, E. L. Coward, J. E. Dodd, L. Gilbert
1985, American Association of Petroleum Geologists Bulletin (69) 1275-1294
Common-depth-point (CDP) seismic reflection data in the southwestern Bahamas reveal the northern edge of the tectonized zone that resulted from the late Mesozoic-early Cenozoic collision of Cuba and the Bahamas. Two seismic facies are present: a basin facies and a shallow-water carbonate-platform facies. In Santaren Channel, between Cay Sal and...
MONITORING THE EARTH - TOO MANY PLAYERS?
Gene A. Thorley
1985, Conference Paper, Technical Papers of the American Society of Photogrammetry, Annual Meeting
Remote sensing from satellites provides a unique tool to measure the parameters of the Earth on a worldwide scale. A number of organizations are currently engaged in, or proposing to embark on, worldwide measurement/monitoring programs. Program objectives vary in type and complexity, including a form of technical library and an...
Case for periodic, colossal jokulhlaups from Pleistocene glacial Lake Missoula
R. B. Waitt Jr.
1985, Geological Society of America Bulletin (96) 1271-1286
Two classes of field evidence firmly establish that late Wisconsin glacial Lake Missoula drained periodically as scores of colossal jökulhlaups (glacier-outburst floods). (1) More than 40 successive, flood-laid, sand-to-silt graded rhythmites accumulated in back-flooded valleys in southern Washington. Hiatuses are indicated between flood-laid...
Water-level changes in the Ogallala aquifer, northwestern Oklahoma.
J.S. Havens
1985, Oklahoma Geology Notes (45) 205-210
The Ogallala aquifer, that part of the High Plains aquifer in Oklahoma, is part of a regional aquifer system that underlies parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. In 1978 the US Geological Survey began a 5- year study of the High Plains regional...
Geochemical mass-balance relationships for selected ions in precipitation and stream water, Catoctin Mountains, Maryland
B. G. Katz, O.P. Bricker, M.M. Kennedy
1985, American Journal of Science (285) 951-962
Results of a study of input/output mass balances for major ions based on the chemical composition of precipitation and stream-water, geochemical reactions with different loading rates of hydrogen ion, and watershed processes influencing the chemical character of stream-waters in two small watershed areas are reported with a view to predicting...
GELIFICATION OF WOOD DURING COALIFICATION.
Patrick G. Hatcher, Lisa A. Romankiw, John R. Evans
1985, Conference Paper
Coalified wood was examined by SEM and CPMAS**1**3C NMR to delineate chemical and physical alterations responsible for gelification. Early coalification selectively degrades cellulosic components, preserving lignin-like components that are eventually transformed to coal. Cellular morphology persists until the chemical composition becomes uniform, at which point the cells coalesce under compaction...
More on the alleged 1970 geomagnetic jerk
L.R. Alldredge
1985, Physics of the Earth and Planetary Interiors (39) 255-264
French and United Kingdom workers have published reports describing a sudden change in the secular acceleration, called an impulse or a jerk, which took place around 1970. They claim that this change took place in a period of a year or two and that the sources of the alleged jerk...
An estimate of hydrothermal fluid residence times and vent chimney growth rates based on 210Pb Pb ratios and mineralogic studies of sulfides dredged from the Juan de Fuca Ridge
D. Kadko, R. Koski, M. Tatsumoto, R. Bouse
1985, Earth and Planetary Science Letters (76) 35-44
The210PbPb ratios across two sulfide samples dredged from the Juan de Fuca Ridge are used to estimate the growth rate of the sulfide material and the residence time of the hydrothermal fluid within the oceanic crust from the onset of basalt alteration.210Pb...
Redescription of Bellerophon bittneri (Gastropoda: Triassic) from Wyoming.
E. L. Yochelson, D.W. Boyd, B. Wardlaw
1985, Contributions to Geology - University of Wyoming, Laramie (23) 99-104
Bellerophon bittneri Newell and Kummel is an Early Triassic bellerophontacean from the Dinwoody Formation in the Wind River Mountains. The available type material consists of one fair, but incomplete, external mold, which resembles a Bellerophon but is actually a Retispira. After repeated search, additional specimens were found at one locality...
PREPRO: a computer program for encoding regional exploration data for use in characteristic analysis
N.J. Bridges, J.T. Hanley, R.B. McCammon
1985, Computers & Geosciences (11) 513-519
The preprocessor (PREPRO) computer program offers the exploration geologist a variety of options for encoding regional exploration data into ternary form for use in characteristic analysis. PREPRO's options include variable-input formats, cursor input, ordering among a set of input variables, and selectable ternary transformations. Moreover, the program provides for the...
Origin of discontinuities in coal-bearing strata at roaring creek (basal Pennsylvanian of Indiana)
W.J. Nelson, Donald L. Eggert, William A. DiMichele, A.C. Stecyk
1985, International Journal of Coal Geology (4) 355-370
Basal Pennsylvanian coal-bearing strata exposed along Roaring Creek, west-central Indiana, exhibit extreme lateral discontinuity. Coal seams abruptly change in thickness and elevation; they split, grade into shale, are cut out by channels and disrupted by soft-sediment deformational structures. Initial sediments were...
QUALITY ASSURANCE OF U. S. GEOLOGICAL SURVEY WATER-QUALITY FIELD MEASUREMENTS.
D. E. Erdmann, J.D. Thomas
1985, Conference Paper, ASTM Special Technical Publication
Reference samples are submitted semiannually to field analysts for measurement of these parameters with the same techniques and instruments used in the field. Both the personnel and the instruments involved in making the determinations are recorded. When the data are complete, a report defining the quality of the analytical results...
Map showing the potentiometric surface of the Magothy aquifer in southern Maryland, September 1983
Frederick K. Mack, Judith C. Wheeler, Stephen E. Curtin
1985, Water-Resources Investigations Report 85-4000
No abstract available....
Reports from the U.S. Geological Survey’s Cascades Volcano Observatory at Vancouver, Washington
S. Brantley, J. Power, L. Topinka
1985, Earthquake Information Bulletin (USGS) (17) 20-32
The heat-capacity of ilmenite and phase equilibria in the system Fe-T-O
Lawrence M. Anovitz, A.H. Treiman, E.J. Essene, B. S. Hemingway, E.F. Westrum Jr., V.J. Wall, R. Burriel, S.R. Bohlen
1985, Geochimica et Cosmochimica Acta (49) 2027-2040
Low temperature adiabatic calorimetry and high temperature differential scanning calorimetry have been used to measure the heat-capacity of ilmenite (FeTiO3) from 5 to 1000 K. These measurements yield S2980 = 108.9 J/(mol · K). Calculations from published experimental data on the reduction of ilmenite yield Δ2980(I1) = −1153.9 kJ/(mol · K). These new data, combined with available experimental and...
Chemistry and transport of soluble humic substances in forested watersheds of the Adirondack Park, New York
C. S. Cronan, G. R. Aiken
1985, Geochimica et Cosmochimica Acta (49) 1697-1705
Studies were conducted in conjunction with the Integrated Lake-Watershed Acidification Study (ILWAS) to examine the chemistry and leaching patterns of soluble humic substances in forested watersheds of the Adirondack region. During the summer growing season, mean dissolved organic carbon (DOC) concentrations in the ILWAS watersheds ranged from 21–32 mg C...
Distribution of zinc heavy-mineral-concentrate from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
W. R. Griffitts, J. W. Whitlow, K.A. Duttweiler, D. F. Siems, L. O. Wilch
1985, Open-File Report 84-843-D
No abstract available....
Toxic materials, fishing, and environmental variation: Simulated effects on striped bass population trends
C.P. Goodyear
1985, Transactions of the American Fisheries Society (114) 107-113
Decreased survival of larval striped bass Morone saxatilis resulting from toxic chemicals in the environment and decreased survival of adults caused by fishing both are suspected as agents contributing to the decline in the Chesapeake Bay stock since the mid‐1970s. The relative power of each type of mortality to cause...
Relationship between reported commercial landings and abundance of young striped bass in Chesapeake Bay, Maryland
C.P. Goodyear
1985, Transactions of the American Fisheries Society (114) 92-96
The ability to predict subsequent landings of striped bass Morone saxatilis from the indices of abundance of juveniles (young of the year) determined annually by the Maryland Department of Natural Resources was evaluated by multiple‐regression techniques. About 57% of the variation in reported landings could be accounted for by the...
Ground-water flow in the Prairie du Chien-Jordan aquifer related to contamination by coal-tar derivatives, St. Louis Park, Minnesota
J. R. Stark, M. F. Hult
1985, Water-Resources Investigations Report 85-4087
A three-dimensional, ground-water-flow model of the Prairie du Chien-Jordan aquifer and associated hydrogeologic units was developed to evaluate the movement of coal-tar derivatives from a coal-tar distillation and wood-preserving plant in St. Louis Park, Minnesota. A finite-difference grid was superimposed on the modeled area, which includes most of eastern Hennepin...
