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The AAPG/Datapages Combined Publications Database

Showing 10,235 Results. Searched 200,619 documents.

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Deposition and Early Hydrologic Evolution of Westwater Canyon Wet Alluvial-Fan System: ABSTRACT

W. E. Galloway

AAPG Bulletin

... of regional discharge or stagnation. In either event, only limited downward flux of acidic water is recorded by local bleached, kaolinized zones where...

1979

Channel Sandstone Oil Reservoirs of Pennsylvanian Age, Northwestern Ness County, Kansas: ABSTRACT

Robert F. Walters, Robert J. Gutru, Alfred James, III

AAPG Bulletin

... mi (9.6 km) long; (4) the coarsening downward from very fine quartz grains to coarse sand and pea gravel at the base; (5) the enhanced permeability...

1979

Distribution and Alteration of Ogallala Volcanic-Ash Deposits and Their Possible Relation to Uranium Mineralization in Western Oklahoma: ABSTRACT

S. Bloch, Kenneth S. Johnson

AAPG Bulletin

... of the Pearlette ash did not disclose any alteration trends or a downward decrease in the uranium concentration. The uranium content of the Pearlette...

1980

Submarine Diagenesis (Aragonite Dissolution, Cementation by Calcite, and Dolomitization) in Ordovician Galena Group, Upper Mississippi Valley: ABSTRACT

David J. Delgado

AAPG Bulletin

... beneath hardgrounds in some strata which otherwise lack these fossils. Fine to very fine crystalline dolomite fills burrows extending downward from many...

1980

Examples of Abnormal Fluid Pressure Produced by Hydrocarbon Generation: ABSTRACT

Fred F. Meissner

AAPG Bulletin

... create fractures which propagate upward or downward from the source rocks and control vertical migration through large thicknesses of seemingly...

1980

Petroleum Exploration and Wrenching Model, Michigan Basin: ABSTRACT

C. E. Prouty

AAPG Bulletin

... suggests that movement along shear faults was episodic, with the axes of related shear folds showing some migration downward. Further testing...

1980

Geometry of Shelf Sandstone Bodies in Shannon-Equivalent Sandstone in Northern Black Hills, Montana and South Dakota: ABSTRACT

George W. Shurr

AAPG Bulletin

.... The lenses trend northwest and are approximately 16 km long and 6 km wide. In adjacent outcrops, sandstone grades downward and laterally to the northeast...

1980

Geology of Gum Island North and French Island Areas, Jefferson County, Texas: ABSTRACT

Robert C. Mason

AAPG Bulletin

.... They are localized as a result of rapid filling of downward troughs created by older growth-fault structural movement, principally of Vicksburg age...

1980

Unconformity-Related Uranium Deposits in Upper Cretaceous Sandstones, Datil Mountains Area, West-Central New Mexico: ABSTRACT

Richard M. Chamberlin

AAPG Bulletin

... of the bleached zone grade downward into the dark-gray sandstones and carbonaceous shales typical of the Crevasse Canyon Formation. Tabular uranium deposits...

1981

Shallow-Seated Dissolution of Bedded Evaporites in Northern Delaware Basin: ABSTRACT

Steven J. Lambert

AAPG Bulletin

... along bedding planes, rather than a single surface migrating downward. The sequence of alterations appears to be: (1) fracture of brittle rock, (2...

1981

Effect of Non-Hydrostatic Stress on Chemical Processes During Diagenesis: ABSTRACT

Walter E. Dibble, Jr., Amos Nur

AAPG Bulletin

... are less than lithostatic (Pf < PL), downward directed stress at grain contacts can produce an inhomogeneous distribution of mineral solubilities. High...

1981

Mineralogic Analysis and Uranium Distribution of Sedimentary-Type Uranium Ores: ABSTRACT

Paul H. Fishman, Wen H. Huang

AAPG Bulletin

... of the orebody is presumably a beach-barrier-bar sequence with its northeastern end delineated by a downward-cutting fluvial system. The bulk...

1981

Internal Breccias near Early Geosynclinal Platform Margins: ABSTRACT

H. Fuchtbauer, D. K. Richter

AAPG Bulletin

... relatively small displacement. Transitions downward into fissures and almost undisturbed rock sections, and upward into mass flows, provide important...

1981

Origin and Evolution of Saline Formation Waters, Lower Cretaceous Carbonates, South-Central Texas: ABSTRACT

Lynton S. Land, Dennis Prezbindowski

AAPG Bulletin

... of galena precipitate in late fractures. Updip and up-fault, the brine becomes progressively diluted with downward-moving meteoric water. On encountering...

1981

Holocene Facies Succession and Depositional Environments of Semi-Enclosed Windward Lagoon off Great Abaco Island, Bahamas: ABSTRACT

Stanley D. Locker, A. Conrad Neumann

AAPG Bulletin

...% of the normal marine section. The N.M. wackestone typically grades downward into a dark gray restricted marine (brackish to hypersaline) skeletal...

1981

Burial Diagenesis of Illite/Smectite, a Kinetic Model: ABSTRACT

D. G. McCubbin, J. W. Patton

AAPG Bulletin

... in the mixed-layer illite/smectite (I/S) clays involve a progressive downward increase in the proportion of illite layers, followed by a change from random...

1981

Cenozoic Deep-Water Benthic Foraminifers: ABSTRACT

Detmar Schnitker

AAPG Bulletin

... a net downward depth range extension of bathyal species occurred. During the late Miocene the periodic vertical migrations of bathyal and abyssal faunas...

1981

Present Thermal State of Western Canada Sedimentary Basin: ABSTRACT

Jacek Majorowicz, Alan M. Jessop

AAPG Bulletin

... and downward fluid flow through much of the Cenozoic and Mesozoic strata seems to be the main influence on heat distribution in the basin. Analyses...

1981

Signatures of Surficial Sand and Small-Scale Mass Wasting of Sediments at Shelf Break and Upper Slope Seaward of Baltimore Canyon Trough: ABSTRACT

Terry A. Nelsen, Richard H. Bennett

AAPG Bulletin

... structures were recovered in a box core taken 400 m north of Wilmington Canyon. A thick sandy surface layer extended downward as End_Page 1667...

1981

Depositional Environments and Reservoir Morphologies of Channel Sandstones: ABSTRACT

Richard R. Bloomer

AAPG Bulletin

... convex-downward bases. Stratigraphic traps are in thin distributary-channel and delta-plain sandstone facies of shelf-elongate deltas on shelves. Shelf...

1981

Depositional Environments and Reservoir Morphologies of Channel Sandstones: ABSTRACT

R. R. Bloomer

AAPG Bulletin

...-downward bases. Stratigraphic traps are in thin distributary-channel sandstone facies of shelf-elongate deltas overlying limestone and shale beds...

1982

Origin of Structures in Permian Basin: ABSTRACT

Jack G. Elam

AAPG Bulletin

... founders. Gravity takes over and movement is downward on the faults in response to the cooling cycle. Moderate extension occurs when the dome...

1982

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