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The AAPG/Datapages Combined Publications Database

Showing 10,054 Results. Searched 197,434 documents.

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Development in In Situ Processing for Shale Oil Recovery: ABSTRACT

Donald E. Garrett, Richard D. Ridley, Randall T. Chew, III

AAPG Bulletin

... at the top of the retort initiates retorting which then proceeds downward ahead of the advancing flame front. The oil produced is pumped from a sump...

1974

Hummocky Cross-Stratification--Indicator of Storm-Dominated Shallow-Marine Environments: ABSTRACT

A. P. Hamblin, W. L. Duke, R. G. Walker

AAPG Bulletin

... is not a form of trough cross-bedding--dips are too low, stratification is as commonly arched upward as downward, and the hummocks and swales are elliptical...

1979

Applications of Crab-Burrow Orientation to Environmental Analysis: ABSTRACT

Gary W. Hill

AAPG Bulletin

.... quadrata burrows generally slope downward away from the shoreline with branches being landward of the main shaft. This preferred orientation is controlled...

1979

Origin of Regional Pre-Middle Devonian Dolomitization in Williston Basin: ABSTRACT

A. C. Kendall

AAPG Bulletin

... gypsum in the mound-flanking beds. Concentration and processing of brines during their downward migration allowed final precipitation of chevron halite...

1979

Nature and Field Application of Plumose Structures: ABSTRACT

Byron R. Kulander, Stuart L. Dean, Christopher C. Barton

AAPG Bulletin

... stratum in a layered sequence indicate overall downward and upward (perhaps basement induced) propagation directions respectively. Recognizing twist...

1979

Movement of Subsurface Waters Under Sabkha, Abu Dhabi, United Arab Emirates, and Its Relation to Dolomite Genesis: ABSTRACT

Judith Ann McKenzie, Kenneth J. Hsu, Jean Schneider

AAPG Bulletin

... surficially or downward through the aquifer at an average rate of 11 cm/year. Subsequent secular evaporation tends to lower the groundwater table...

1979

Late-Stage Subsurface Dolomites--Problems of Origin: ABSTRACT

Eric W. Mountjoy

AAPG Bulletin

... impervious calcareous clays, preventing End_Page 499------------------------------ downward percolation of fresh waters during periods of exposure...

1979

Depth Migration of Seismic Data: ABSTRACT

John Sherwood, Philip Schultz, Jin Lin, David Judson

AAPG Bulletin

... surface. This is projected downward in small increments of depth, making appropriate corrections for the transmission of the seismic waves through...

1979

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

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