Estimation of Seismic Attenuation (Q): More Insight from Zero-Offset VSP

Mohammad Risyad

Indonesian Petroleum Association

... ratio (SNR) at high frequencies can be achieved. In this study, spectral ratio method is performed on downgoing P-wave data from zero-offset VSP...

Gypsum-Oolite Dunes, Great Salt Lake Desert, Utah

Daniel J. Jones

AAPG Bulletin

... velocity, and the layers of algal limestone fragments may represent intervals of vigorous wave action along the lake shore on the west. The average...

Heterogeneous Distribution of Calcite Cement at the Outcrop Scale in Tertiary Sandstones, Northern Apennines, Italy

Earle F. McBride , Kitty L. Milliken , William Cavazza , Ubaldo Cibin , Daniela Fontana , M. Dane Picard , Gian Gaspare Zuffa

AAPG Bulletin

... localized hydrologic factors in determining the spatial distribution of authigenic pore-filling calcite. Spherical concretions grew by diffusive supply...

Distribution of Surface Pebbles with Changes in Wave Energy on a Sandy Estuarine Beach

Karl F. Nordstrom , Nancy L. Jackson

Journal of Sedimentary Research (SEPM)

...Distribution of Surface Pebbles with Changes in Wave Energy on a Sandy Estuarine Beach Karl F. Nordstrom , Nancy L. Jackson 1993 Vol. 63 No. 6...

Seismic Refraction Study on Sedimentary and Granitic Terrain

Samsudin Hj Taib

Geological Society of Malaysia (GSM)

... or displacement at a small region in or on the subsurface materials. The displacement propagates outward from its starting point as a spherical wave...

Abstract: Physical Testing of the Effect of Tilting on the Reflection Coefficient in an Anisotropic Material; #90172 (2014)

Miryam Ortiz-Osornio, Douglas R. Schmitt

Search and Discovery.com

... verification of spherical-wave effect on the AVO response and implications for three-term inversion, Geophysics, 73, C7-C12. Behara, L., and Tsvankin, I., 2009...

Quartz Grain Orientations--1 (The Photometric Method)

R. F. Sippel

Journal of Sedimentary Research (SEPM)

... with wave length of the light used. 5. In the latter part of the paper, photometric data were compared with results obtained by a standard visual...

Recognition of Sandstone Depositional Environment: A Grain Shape Approach, with an Example from North Padre Island

Jim Mazzullo , Donald Sims

GCAGS Transactions

... that spherical sand grains have a strong tendency to move under the influence of the wind, while less spherical grains tend to lag behind. Mattox (1955), however...

The Rounding of Sand Grains

W. H. Twenhofel

Journal of Sedimentary Research (SEPM)

... and on beaches and eolian transportation in any environment. It is concluded that stream traction transportation does not favor rounding of sand grains, that wave...

Behavior of Grain Size Characteristics on Reflective and Dissipative Foreshores, Broken Bay, Australia

Edward Bryant

Journal of Sedimentary Research (SEPM)

...), Beach morphology, wave-current dynamics, or sediment attributes such as grain-size changes and sorting processes intrinsically characterize each other...

Abstract: Stratigraphically Useful Cretaceous Microfossils-Incertae Sedis

R. P. Zingula

GCAGS Transactions

... ranging in age from Upper Jurassic to Upper Cretaceous. Calcisphaerulids, the spherical bodies so abundant in the "spherulitic lime" of the Washita...

Sources of Pleistocene and Holocene Sand for Northeast Gulf of Mexico Shelf and Mississippi Fan: ABSTRACT

Jim Mazzullo, Charles Bates

AAPG Bulletin

... province, characterized by spherical quartz grains derived from older strata in the drainage basin of the Mississippi River, and the eastern Gulf...

Fragmentation Processes in Explosive Volcanic Eruptions

Grant Heiken, Kenneth Wohletz

Special Publications of SEPM

... significant buoyant If vesiculation mouth of a vent nearly spherical fragmentation for tube like shapes rising bubbles the vesicles are sheared...

Frequency-dependent seismic anomalies resulting from anisotropic permeabilities in hydrocarbon-bearing fractured porous rocks

Xuehua Chen, Xiaomin Jiang, Shengyi Wang

International Meeting for Applied Geoscience and Energy (IMAGE)

... the understanding of seismic wave anomalies in actual fractured reservoirs under cases of anisotropic permeabilities. It can be beneficial for permeability...

Synthesis of Gem Minerals

Harold E. Enlows

Tulsa Geological Society

... such as calcite or pyrite growing in fractures in the gem mineral. Gems Synthesized by the Verneuil or Fusion Method. Gas bubbles, usually spherical...

Abstract: Organoporosity (Фom) versus Mineral Matrix porosity (Фmm) in “Shale” Reservoirs using the Maxwell-Garnett Equation and Shaly Sandstone Producibility (Q) Plot

G. B. Asquith

West Texas Geological Society

...): 10 – 1000nm OM (Фom): 5 – 750nm The Maxwell-Garnett Equation is designed to model the low frequency current response in a mixture of spherical pores...

Predicting Rock and Fluid/Rock Properties by Modeling Diagenesis, by Steven L. Bryant, #90027 (2004)

Search and Discovery.com

Abstract: Microbial Biomineralization Processes Forming Stromatolitic Dolostone From the Ediacaran in the Sichuan Basin, Northeast China; #90310 (2017)

Jie Zhang

Search and Discovery.com

... of stromatolitic dolostone and found abundant spherical, oval-like dolomites, the size of which are 5-15 microns. It is the first time...

Abstract: Simple Wavefield Modelling to Evaluate the Low Frequency Artifacts in Reverse-Time Migration; #90224 (2015)

John C. Bancroft

Search and Discovery.com

... to eliminate spherical divergence. The wavefield was propagated using a two-way finite difference solution to the acoustic wave equation 2P 1 2P...

Shape Evolution and Fabric in a Boulder Beach, Monument Cove, Maine

Charles J. Waag, David E. Ogren

Journal of Sedimentary Research (SEPM)

... on the backbeach. The blocks are subsequently rounded by wave action to form a pocket boulder and cobble beach. Measurements of the talus blocks and boulders...

Unusual Nuclei in Oolites from the Morrow Group Near Fayetteville, Arkansas

Lloyd G. Henbest

Journal of Sedimentary Research (SEPM)

.... The oolite grains are generally as closely packed as they can lie. The majority of the oolite grains are spherical or nearly spherical, but a considerable...

Correlation of Mean Sizes Obtained from Size Measurement by Thin-Section and Loose-Grain Methods: ABSTRACT

Basanta K. Sahu

AAPG Bulletin

...) Wicksell's or Krumbein's corrections based on probability of sectioning spherical grains at random can be used to yield loose-grain size moments from...

Synthesis of spherical and faceted ?-Fe2o3 nanoparticles, their encapsulation in mesoporous Sio2 nano cells and their use as H2S adsorbents

Search and Discovery.com

The Movement of Gravel by the Alga Fucus Vesiculosus (L.) on an Arctic Intertidal Flat

Robert Gilbert

Journal of Sedimentary Research (SEPM)

..., and the plant is increasingly affected by wave and current action. Windrows of Fucus debris at the high tide line were examined in a 1-km section of beach...

Wave-Worked Conglomerates — Depositional Processes and Criteria for Recognition

Joanne Bourgeois, Elana L. Leithold

CSPG Special Publications

...Wave-Worked Conglomerates — Depositional Processes and Criteria for Recognition Joanne Bourgeois, Elana L. Leithold 1984 331 343 Wave-worked...