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The AAPG/Datapages Combined Publications Database

Showing 31,900 Results. Searched 200,691 documents.

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Saturated hydraulic conductivity (Ks) of earth materials in the weathering profile over quartz-mica schists of the Seremban area, Negeri Sembilan

John Kuna Raj

Geological Society of Malaysia (GSM)

... 16.2 m thick and consists of in situ, moderately to highly weathered quartz-mica schists marked by steeply dipping to vertical bands of variable...

2020

Provenance and Diagenesis of Clay Minerals in Sediments from the Anclote River and Anchorage, West Central Florida

Wen-An Chiou , Larry J. Doyle , William R. Bryant

GCAGS Transactions

... chlorite, chlorite-vermiculite mixed layer, and illite increase. This change results from the combined effects of tidal inflow and transport...

1981

Influence of Geological Factors on Longitudinal Seismic Velocities

B. B. Weatherby , L. Y. Faust

AAPG Bulletin

... velocities followed the mean closely. Because of the presence near the surface of the weathered layer of rather indefinite extent, some question may exist...

1935

Frequency-Domain Waveform Tomography in the Foothills: Velocity Model Estimation with Synthetic Long-Offset Data

Search and Discovery.com

... the weathered layer and underlying formations. Source energy can become “trapped” in the near-surface, reducing the amount of energy propagating...

2013

Field Trip Guide for the Monterey Formation, Santa Barbara Coast, California

Caroline M. Isaacs

Pacific Section of AAPG

... compositional and diagenetic differences among rocks and to observe general effects of weathering. Five major localities will be visited in progressive...

1981

Composition, Diagenesis, and Weathering of the Sediments and Basement of the Callabonna Sub-Basin, Central Australia: Implications for Landscape Evolution

Eric Tonui,,, Patrice De Caritat,§

Journal of Sedimentary Research (SEPM)

..., and sand comprising sandy, mottled, and gray clay units overlain by Quaternary soil. The basement consists of weathered Proterozoic schist, gneiss...

2003

Prospecting for Iron Ore in the Bedong Area, Kedah Using Geophysical Techniques

C. Y. Lee, I. H. Abdoul-Fatah

Geological Society of Malaysia (GSM)

... layer is barren homogeneous clay, possibly weathered shale bedrock (Bean, 1969; Bradford, 1972). More recent mining activities in adjacent areas have...

2002

Evaporite-Solution Brecciation and Devonian Carbonate Reservoir Porosity in Western Canada

F. W. Beales , A. E. Oldershaw

AAPG Bulletin

... of breccia layer in Fairholme dolostone. These breccias commonly are resealed and difficult to detect unless suitably weathered surfaces are available. Part...

1969

Petrology and Origin of Phosphorites

G. Donald Emigh

Utah Geological Association

... similar fields in the southeastern United States. (5) Surface and near surface weathered areas of all marine phosphorites - examples, Phosphoria...

1967

Clay Mineralogy of the Old Red Sandstone (Devonian) of Scotland

M. J. Wilson

Journal of Sedimentary Research (SEPM)

... of layer silicates. Spectrochim. Acta., v. 20, p. 1149-1173. FRIEND, P. F., 1966, Clay fractions and colours of some Devonian red beds in the Catskill...

1971

Quality of the Smirl Coal, Alton Coalfield, Kane County, Utah

Jeffrey C. Quick

Utah Geological Association

... the geographic variation of these coal quality parameters as well as areas with weathered coal where moisture contents are elevated. Local weathering...

2010

Guide to Late Pleistocene and Holocene Deposits of Turnagain Arm

Susan Bartsch-Winkler, Henry L. Schmoll

Alaska Geological Society

... the effects of the 1964 earthquake at Portage, southern Alaska, in Coonrad, W. L., ed., The U.S. Geological Survey in Alaska–Accomplishments during 1981...

1984

Fluvial reservoir architecture, directional heterogeneity and continuity, recognizing incised valley fills, and the case for nodal avulsion on a distributive fluvial system: Kern River field, California

D. K. Larue, J. Allen, D. Beeson, and J. Robbins

AAPG Bulletin

... for the field on a layer-by-layer basis (Figure 4, right). Variations in net-to-gross from approximately 0.45 to 0.8 occur in the succession in the earth model...

2023

Changes in soils and terrestrial landscapes of the Appalachian Basin (Conemaugh, Monongahela, and Dunkard groups), U.S.A., at the onset of the late Paleozoic climate transition

Daniel I. Hembree

Journal of Sedimentary Research (SEPM)

... to early Permian resulting from the destabilization of ice sheets in the Southern Hemisphere had important effects on terrestrial landscapes around...

2024

Dolomitization Patterns in Subtidal Bighorn Dolomite (Upper Ordovician), Southeastern Wind River Range, Wyoming: ABSTRACT

Donald H. Zenger

AAPG Bulletin

... in the matrix results in its lesser resistance. Where weathered tubes are even with or recessed below the matrix, pores in the matrix are filled...

1984

Reflections on the Interpretation of Heavy Mineral Analyses

Tj. H. Van Andel

Journal of Sedimentary Research (SEPM)

... the sequence: weathered layer--sedimentary and low rank metamorphics--high rank metamorphics and igneous, in the source areas. Numerous published studies...

1959

Depth of bedrock in the Seal Cove river valley, Newfoundland: a geophysical case study

E. Scott Schillereff, Hugh Miller, John E. Gale

Atlantic Geology

... electromagnetic and refraction hammer seismic methods. These geophysical interpretations, based on an assumed two-layer geometry, were compared with direct...

1987

9 References

P. E. Gretener

AAPG Special Volumes

..., p. 428-450. Birch, F., 1948, The Effects of Pleistocene Climatic Variations upon Geothermal Gradients; Am. J. Sci., 246, p. 729-760. Birch, F...

1981

The Oldest Marine Carbonate Ooids Reinterpreted as Volcanic Accretionary Lapilli, Onverwacht Group, South Africa

Donald R. Lowe, L. Paul Knauth

Journal of Sedimentary Research (SEPM)

.... They commonly show concentric internal structuring, including a nucleus, a relatively coarse-grained detritus layer made up of recrystallized vitric...

1978

Extended Abstract: Locating Faults in Louisiana Gulf Coast Quaternary Stratigraphy by Combination of Cone Penetrometer Tests with Borings and Chirp Seismic Data, Golden Meadow, Louisiana

Allison Scates, Rui Zhang

GCAGS Transactions

... Association of Geological Societies Transactions, v. 53, p. 262–276. Gagliano, S. M., 2005, Effects of earthquakes, fault movements, and subsidence on the South...

2019

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