Subdivision and regional stratigraphy of the pre-Punta Gorda rocks (lowermost cretaceous-jurassic?) in South Florida
A.V. Applegate, George O. Winston, James George Palacas
1981, Gulf Coast Association of Geological Societies Transactions (31) 447-453
In recent years several wells have been drilled in the South Florida Basin through carbonate and evaporite sequences to depths as much as 5,300 ft below the Punta Gorda Anhydrite. The deepest well penetrated igneous basement rocks to a total depth of 18, 670 ft. Correlation of anhydrite beds below...
Lower Eocene alluvial paleosols (Willwood Formation, Northwest Wyoming, U.S.A.) and their significance for paleoecology, paleoclimatology, and basin analysis
Thomas M. Bown, M. J. Kraus
1981, Palaeogeography, Palaeoclimatology, Palaeoecology (34) 1-30
The lower Eocene Willwood Formation of northwest Wyoming is a 700 m thick accumulation of alluvial floodplain and channel mudstones and sandstones, nearly all of which show paleopedogenic modifications. Pedogenesis of Willwood sandstones is indicated by taproot and vertebrate and invertebrate bioturbation, early local cementation by calcium carbonate, and thin...
An informal palynologic zonation for the cretaceous system of the United States mid‐Atlantic (Baltimore canyon area) outer continental shelf
John W. Bebout
1981, Palynology (5) 159-194
No abstract available...
Linear island and seamount chains, aseismic ridges and intraplate volcanism: Results from DSDP
David A. Clague
1981, SEPM Special Publication (32) 7-22
The Deep Sea Drilling Project drilled a substantial number of sites that bear on the origin of linear island and seamount chains, aseismic ridges and other more regional expressions of intraplate volcanism. Drilling in the Emperor Seamounts during Leg 55 was particularly successful. Results from this leg include: 1)...
Uranium-series and soil-geomorphic dating of the Calico archaeological site, California
James L. Bischoff, Roy J. Shlemon, T. L. Ku, R.D. Simpson, Robert J. Rosenbauer, Budinger
1981, Geology (9) 576-582
Lithic specimens identified as artifacts have been recovered from near the base of the Yermo fan deposits at Calico, California. The soil on the fan surface is a strongly developed relict paleosol. Comparison of this soil with dated paleosols elsewhere in the southwestern United States suggests that the surface is...
Geologic transect of the northern Diablo Range, California
M. Clark Blake Jr.
1981, Conference Paper, Upper Mesozoic Franciscan Rocks and Great Valley Sequence, Central Coast Ranges, California: Field Trip Guide V
No abstract available....
On the use of nonlinear soil models
Albert T.F. Chen
1981, Conference Paper, Proceedings: First International Conference on Recent Advances in Geochemical Earthquake Engineering and Soil Dynamics
The basic definitions of, and the differences between, currently available soil models are reviewed. These models are applied to site response analyses where two depths and two levels of base input motion are considered. Computational results are presented and compared with regard to the effects of using different soil models...
United States gold resource profile
S.M. Cargill
1981, Economic Geology (76) 937-943
No abstract available...
Rare-earth element geochemistry of the island-arc volcanic rocks of Rabaul and Talasea, New Britain
Joseph G. Arth
1981, Geological Society of America Bulletin (92) 858-863
The island-arc volcanic rocks of Rabaul and Talasea, New Britain, range in composition from basalt through rhyolite. Rare-earth elements have been determined by mass-spectrometric isotope dilution in 16 samples. Chondrite-normalized rare-earth element patterns are distinct for each volcanic center, but all are relatively flat (Ce/YbE.F. = 1.1 to 3.0). Within...
The National Coal Resources Data System: A status report
M. Devereaux Carter, Antoinette L. Medlin, Kathleen K. Krohn
1981, Geological Society of America Bulletin (92) 563-573
The National Coal Resources Data System (NCRDS) of the U.S. Geological Survey is an interactive computerized storage, retrieval, and display system to assess the quantity and quality of the nation's coal resources. It has been developed to provide geological coal-resource data currently available, to update that data, and to...
Sedimentology of Great Sand Dunes, Colorado
Sarah Andrews
1981, SEPM Special Publication 31
Eolian and adjacent deposits of Great Sand Dunes Colorado form a small but sedimentologically complex deposit Eolian sediments can be subdivided into three provinces trending downwind northeast I low as much as 10 m high alkali cemented dunes forming discontinuous rings around broad flat bottomed ephemeral lakes II undulating vegetated...
Potential source for crushed granite aggregate in Heard County, Georgia
R. L. Atkins, Michael W. Higgins, Robert P. Dickerson
1981, Report
The production of crushed stone suitable for highway and general construction is a major industry in Georgia. The state ranks eighth in the nation in overall crushed stone production, and first in crushed granite production. Crushed stone production in Georgia in 1979 was 40,902,000 short tons worth $154,021,000 (D.H. White,...
Conceptual models governing leaching behavior and their long-term predictive capability
Hans C. Claassen
1981, Nuclear and Chemical Waste Management (2) 307-313
Six models that may be used to describe the interaction of radioactive waste solids with aqueous solutions are as follows:Simple linear mass transfer;Simple parabolic mass transfer;Parabolic mass transfer with the formation of a diffusion-limiting surface layer at an arbitrary time;Initial parabolic mass transfer followed by linear mass transfer at an...
The complex of alkaline rocks at Iron Hill, Powederhorn district, Gunnison County, Colorado
T.J. Armbrustmacher
1981, Book chapter, New Mexico Geological Society Guidebook
No abstract available...
Earth flows along Henry Creek, northern Alaska
L. David Carter, John Galloway
1981, Arctic (34) 325-328
Many earth flows occurred during the summer of 1979 in the hilly terrain near Umiat, Alaska, particularly along Henry Creek. Most were shallow, involving only the tundra mat and no more than 1.5 m of the underlying mud. The summer of 1979 was the warmest and wettest for the period...
Estimation of depth to magnetic source using maximum entropy power spectra, with application to the Peru-Chile Trench
Richard J. Blakely
1981, Memoir of the Geological Society of America (154) 667-682
Estimations of the depth to magnetic sources using the power spectrum of magnetic anomalies generally require long magnetic profiles. The method developed here uses the maximum entropy power spectrum (MEPS) to calculate depth to source on short windows of magnetic data; resolution is thereby improved. The method operates by dividing...
Seismic zonation in the San Francisco Bay region
E. E. Brabb
1981, Conference Paper, Proceedings: Social and economic impact of earthquakes on utility lifelines: Seismic considerations in lifelines planning, siting and design: Construction Division specialty conference
No abstract available....
Chrysophyte cysts as potential environmental indicators
David P. Adam, Albert D. Mahood
1981, Geological Society of America Bulletin (92) 839-844
Many Chrysophyte algae produce morphologically distinctive, siliceous, microscopic cysts during a resting stage of their life cycles; these cysts are often preserved in sediments. Scanning electron microscopy and Nomarski optics permit much more detailed observation of these cysts than was heretofore possible. We have used an ecologic and biogeographic approach...
Organochlorine residues in fish: National Pesticide Monitoring Program, 1970-74
Christopher J. Schmitt, J. Larry Ludke, D. F. Walsh
1981, Pesticides Monitoring Journal (14) 136-206
As part of the National Pesticide Monitoring Program, the U.S. Fish and Wildlife Service analyzed organochlorine contaminant residues in fish samples collected from about 100 stations each year from 1970 to 1974. During this period, mean residues of DDT and its metabolites declined nationally but remained widespread, and high concentrations...
Radiometric and paleomagnetic evidence for the Emperor reversed polarity event at 0.46 ± 0.05 M.Y. in basalt lava flows from the eastern Snake River Plain, Idaho
Duane E. Champion, G. Brent Dalrymple, Mel A. Kuntz
1981, Geophysical Research Letters (8) 1055-1058
K-Ar and paleomagnetic data from cores through a sequence of basalt flows in the eastern Snake River Plain provide evidence for a brief (0.005 to 0.01 m.y.) reversal of the geomagnetic field 0.46 ± 0.05 m.y. ago. This reversed polarity event has also been found in sea-floor magnetic anomalies and...
Progradational sequences in Miocene shoreline deposits, southeastern Caliente Range, California
H. Edward Clifton
1981, Journal of Sedimentary Petrology (51) 165-184
An exceptionally well exposed marine-nonmarine transition in middle Miocene strata exists in the southeastern Caliente Range, California. About 50 individual progradational sequences form a succession that ranges in thickness from approximately 1000 m (where predominantly nonmarine) to more than 2500 m (where predominantly marine). Paleogreographic evidence in basalt flows near...
A diver operated reverse corer to collect samples of unconsolidated coarse sand
Roberto J. Anima
1981, Journal of Sedimentary Petrology (51) 653-654
No abstract available...
Decontaminating and recycling zinc bromide solution used in sink-float separation of kerogen
Charles E. Barker
1981, Journal of Sedimentary Research (51) 666-667
No abstract available...
Road log
T.M. Berg, G.H. Crowl, W.E. Edmunds, P.B. Luce, W. D. Sevon, P. Wilshusen, Donald L. Woodrow, H. A. Pohn, editor(s)
1981, Conference Paper, Guidebook for the 46th Annual Field Conference of Pennsylvania Geologists
No abstract available...
Temporal and spatial variations in suspended matter in continental shelf and slope waters off the north-eastern United States
Michael H. Bothner, Carol M. Parmenter, John D. Milliman
1981, Estuarine, Coastal and Shelf Science (13) 213-234
Seston in waters of Georges Bank originates primarily from biological production and from resuspension of bottom sediments. The concentrations of suspended matter observed on the central shoals are more influenced by storms than by seasonal changes. Winter storms produce highest concentrations of non-combustible material throughout the water column, and summer...
