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Showing 34,420 Results. Searched 195,689 documents.
Recent Sediments of Hypersaline Estuarine Bay: ABSTRACT
R. T. Alaniz, R. H. Goodwin
AAPG Bulletin
.... Organic content of bottom sediments is inversely proportional to grain size. Oolitic aragonitic sands are present in the bay and are more extensive than...
1974
Geochemical Evaluation of Ensenada de la Vela Basin, Offshore Falcon State, Venezuela: ABSTRACT
K. W. Stauffer, R. Araujo
AAPG Bulletin
...) Maturation mapping in the Tertiary La Vela basin, based on bottom-hole temperatures of 12 wells, indicates that only the Paleogene Guarabal Formation...
1979
Late Quaternary Foraminiferal Record in Eastern Caribbean Cores--Paleo-Oceanographic Implications: ABSTRACT
Tommy J. Temples, Barun K. Sen Gupta
AAPG Bulletin
... with colder bottom waters and can be used to draw inferences about the influx of such waters. Periods of cold-water influx ranged from before 367,000 to 210,000...
1979
Geology and Hydrocarbon Accumulation in Mississippian Midale Beds, Benson Oil Field, Southeastern Saskatchewan: ABSTRACT
Scott R. Smith
AAPG Bulletin
... (cryptocrystalline) provide the caprocks and the bottom seals for the porous layers. Laterally, the dolomites grade into highly calcareous dolomites...
1979
Trace Fossils and Stagnation of Deep-Sea Basins: ABSTRACT
A. A. Ekdale
AAPG Bulletin
... sediment are useful indicators of the response of benthic organisms to fluctuating oxygen levels in the bottom water. Trace fossil assemblages in mid...
1980
Recent, Supracrustal, Carbonate Cementation, Florida Keys: ABSTRACT
William A. Butcher, Don C. Steinker, Jack C. Floyd
AAPG Bulletin
... stromatolites, the crust of which ranges in age from 5,680 years B.P. at the bottom to 400 years B.P. at the top, overlie Pleistocene bedrock...
1981
Mixing-Zone Origin of "Primary" Dolomite Grains from Cretaceous Marine Sandstones of Western Interior Basin: ABSTRACT
Stephen P. Cumella
AAPG Bulletin
... formed was close enough to the ocean bottom to be later eroded, abraded, and redeposited during storms or transgressions. Dolomite rhombs that were...
1981
Recent Benthic Foraminiferal Biofacies from Northeast United States Continental Slope and Rise: ABSTRACT
Kenneth G. Miller, G. P. Lohmann
AAPG Bulletin
.... This suggests that its distribution may be influenced by low oxygen in the sediments or adjacent bottom waters, rather than by low oxygen water masses. End...
1981
Potential of Evaporitic Environment as Source of Petroleum: ABSTRACT
Robert Evans, Douglas W. Kirkland
AAPG Bulletin
... conditions may be ass ciated with the bottom waters, much of the organic matter produced can be preserved. Upon maturation, the result may be a rich...
1981
Calculation of Thermal Conductivity from Lithology and Laboratory Measurements on Oil Well Cores: ABSTRACT
Victor Vacquier
AAPG Bulletin
..., the conductivities. Heat flow can be then calculated by multiplying the mean conductivity by the temperature gradient obtained from corrected bottom-hole...
1981
Petroleum Source Beds: Environment of Deposition and Stratigraphy: ABSTRACT
Gerard Demaison
AAPG Bulletin
... not correspond with zones of high organic enrichment in bottom sediments (e.g., Grand Banks of Newfoundland, Antarctica, Australia, Northwest Shelf, Northeast...
1981
Mesozoic Paleo-Oceanography of Atlantic and Western Interior Seaway: ABSTRACT
William W. Hay
AAPG Bulletin
... oc ans. Periodic filling of individual basins by especially dense warm salty bottom water caused partial overturning and high productivity, followed...
1982
Eustatic Control of Deep-Sea Reservoir Facies: ABSTRACT
G. Shanmugam, R. J. Moiola
AAPG Bulletin
... increased. Episodes of low sea level also cause vigorous bottom currents (i.e., contour currents) which winnow away the fine-grained material...
1982
Circum-Pacific Map Project: Framework for International Resources Assessment: ABSTRACT
John A. Reinemund, Warren O. Addicott
AAPG Bulletin
... of new categories and sources of data; and (3) the presentation of geologic and geophysical data such as sea-floor sediment distribution, bottom...
1982
Modern Benthic Foraminifera from Gyre Intraslope Basin, Northern Gulf of Mexico: ABSTRACT
Leslie A. Reynolds
AAPG Bulletin
... uplift. Sediment accumula ion is considerably faster on the bottom than on the rim of the basin, and occurs intermittently. Thirty-seven species...
1982
Comparison of Radiolarian Thanatocoenosis and Biocoenosis from Oligotrophic Gulf of Mexico and Caribbean, and Eutrophic Southern California Sea: ABSTRACT
Cynthia R. Wigley
AAPG Bulletin
... California and are indicative of oligotrophic conditions. Low oxygen content and high dissolved silica concentration in the bottom water of the Orca basin...
1982
Systematics and Paleoecology of Silicified Gastropoda of Tonoloway Formation (Upper Silurian) at Pinto, Maryland: ABSTRACT
Timothy M. Collins
AAPG Bulletin
... data suggest a low-intertidal to shallow-subtidal, soft-bottom, carbonate substrate environment for the gastropod-bearing beds sampled...
1983
Problem of Cements in Classifying Carbonate Rocks, Especially Reefs: ABSTRACT
Gerald M. Friedman
AAPG Bulletin
... of lime mud are (1) available and (2) able to settle on the bottom and remain there, whereas in agitated waters, particles of microsize remain...
1983
Storm Tells: Interaction of Physical Events, Functional Adaptation, and Settling Behavior: ABSTRACT
A. Seilacher
AAPG Bulletin
... also accumulate conspicuous shell mounds if combined with certain biological mechanisms: (1) immobile secondary soft bottom dwellers tend to evolve...
1983
The Miocene Stratigraphy of California Revisited: ERRATUM
R. M. Kleinpell
AAPG Bulletin
... nor bottom. Almgren's sample, discussed by Church (1972) with reference to foraminifers and age of beds at the base of McLure Shale Member in the San...
1983
Geothermal Gradients in Mississippi Embayment: ABSTRACT
William P. Staub, Ned L. Treat
AAPG Bulletin
... of bottom-hole temperatures from oil and gas wells in the northern Mississippi embayment suggests that the geothermal gradient below a depth of 1 km is low...
1983
Gas Hydrates Beneath Continental Slope off Northern California: ABSTRACT
Michael E. Field, Keith A. Kvenvolden
AAPG Bulletin
... and mimics the surface of the sea floor. This bottom-simulating reflector (BSR) lies at an average subsurface depth of 250 m and is laterally continuous...
1985
Lateral Variability in Coals in Western North Slope, Alaska: ABSTRACT
J. S. Youtcheff, P. D. Rao, J. E. Smith
AAPG Bulletin
... composition and ash characteristics within the seam. For instance, the Kukpowruk samples showed an increase in semi-fusinite from 1.3% at the bottom to 32...
1985
Pressure Cycles Related to Gas Generation in Coals and Their Relation to Deep Basin Gas Accumulations: ABSTRACT
Fred F. Meissner
AAPG Bulletin
... and underpressured "basin bottom" gas accumulations in complex and interrelated coal-bed and sandstone reservoirs. Examples of the phenomena are present...
1985
Sedimentary and Geochemical Systems in Transitional Marine Sediments in Northern Gulf of Mexico: ABSTRACT
Wayne C. Isphording, John A. Stringfellow, George C. Flowers
AAPG Bulletin
... contamination and the textural and organic content of the sediments. Analyses further indicated that most metals were partitioned in the bottom sediments...
1985