Tilt and Drainage Ratio in Sedimentary Basins

A. P. Radlinski, S. J. Cadman

AAPG Bulletin

... (defined as the area of drainage for the trap divided by the corresponding area of closure) can by quantified using a one-parameter spherical...

From Arrhenius to CO2 Storage: Part III: A Simple Greenhouse Model

Martin Landrø, Lasse Amundsen

GEO ExPro Magazine

... not continuously reach each square meter of the Earth's spherical surface. As shown in the figure on the opposite page, the area of the Earth...

Graphical Methods of Calculation in Interpretation in Work with the Torsion Balance: DISCUSSION

Donald C. Barton

AAPG Bulletin

... of symmetry, the sole advantage of the various methods making use of spherical or cylindrical coordinates is that one chart or a set of two charts is applicable...

Cretaceous-Tertiary Boundary Microtektite-Bearing Sands and Tsunami Beds, Alabama Gulf Coastal Plain

David T. King Jr., Lucille W. Petruny

GCAGS Transactions

... spherical microtektites display an internal structure that includes intact smaller spherical droplets adhered to infolded inner walls...

The Axial Ratio C/B as an Indicator of shape Selective Transportation

Luis A. Spalletti

Journal of Sedimentary Research (SEPM)

... significance of the axial ratio C/B and the geometricity ratio were analyzed. C/B is a parameter used by Zingg (1935) to differentiate spherical and rod clasts...

Marine Seismic Sources: Part XII: Sound in the Sea

Martin Landrø, Lasse Amundsen

GEO ExPro Magazine

... the energy spreads to fill it. Therefore, the energy per unit length of the wave must get smaller. Spherical and cylindrical spreading are two simple...

Modeling of Sandstone Ngrayong Formation Using Digital Image Analysis

Annisa Rachmi Trahwiwit Widijana, Fourier Dzar Eljabbar, Almira Anissofira, Fatkhan, Handoyo

Indonesian Petroleum Association

... to see the effect of various conditions of the samples. The models are constructed based on their grain shape: spherical, ellipsoidal, and polygon...

Calculation of Stratigraphic Thickness in Parallel Folds: GEOLOGICAL NOTES

John B. Mertie, Jr.

AAPG Bulletin

... spherical, normals to these surfaces at the two station points would intersect in a point. For non-spherical parallel surfaces, however, normals drawn...

The Effects of Eolian Sorting and Abrasion Upon the Shapes of Fine Quartz Sand Grains

Jim Mazzullo, Donald Sims, David Cunningham

Journal of Sedimentary Research (SEPM)

... are reached. The first is that the wind preferentially transports spherical, rounded sand grains, and this can result in the isolation and accumulation...

Determination of Water Saturation in Vuggy Reservoirs Using a Combination of Log Data and the Maxwell-Garnett Equation: Permian Clear Fork Vuggy Dolostone, West Texas

G. B. Asquith

West Texas Geological Society

... that the Maxwell-Garnett Equation which is designed to model low frequency resistivity response in a series of large spherical pores (vugs) within finer...

ABSTRACT: MORPHOLOGY, MINERALOGY AND CHEMISTRY CLASSIFICATION OF HIGH-ALUMINA FLY ASH PARTICLES

Jiangfeng Chen, Longyi Shao, Yuzhen Shi

The Society for Organic Petrology (TSOP)

... of a variety of micro-spherical, spheroidal, oval and irregular particles, including cenospheres, plerospheres, dermaspheres, vesicular spheres and dense spheres...

Abstract: Bulk mineable gold potential in Nova Scotia: a new discovery

P. K. Smith

Atlantic Geology

..., colloform type appearance while others are completely spherical. Cellular type textures with concentric, or semi-circular zonation, is manifest by exotic...

Geological Society of Malaysia Newsletter Number 35 (April 1972)

B. K. Tan editor

Geological Society of Malaysia (GSM)

... grains of quartz, varying in size from c. 100 microns to c. 1.5 JIlIn, and yellowish., crudely spherical bodies, whicn were provisionally :ideqtified...

New Mathematical and "Stereograhic Net" Solutions to Problem of Two Tilts--With Application to Core Orientation: DISCUSSION

D. Jerome Fisher

AAPG Bulletin

... the stereographic projection of the intersections of the planes with the spherical surface, this problem is solved entirely on one half of the sphere. Thus...

A Note on Thin Section Mechanical Analysis: NOTES

Sudhir Basumallick

Journal of Sedimentary Research (SEPM)

..., there is no difference between Mz (long) and Mz (short), or in other words all the grains are approximately spherical. Case II--The distance of this line from...

Abstract: Mineralogy and Granulometry of Airborne Dust from a Cast Iron Foundry in Kuala Lumpur „ A Preliminary Study

T. F. Ng, J. J. Pereira, E. B. Yeap, S. Y. Yap

Geological Society of Malaysia (GSM)

... spherical, and is also known as cenosphere. Quartz particles are mainly subangular to angular. The coarser quartz grains often have clay and iron oxide...

Origin and Distribution of Silica Lepispheres in Porcelanite from the Monterey Formation of California

John H. Oehler

Journal of Sedimentary Research (SEPM)

... are possibly rudimentary lepispheres (1.9 to 2.6 µm in diameter) consisting of a few platy crystals arranged in approximately spherical order (Fig...

Palynoplanktologic Analysis of Some Black Sea Cores: Biology

Stefana Roman

AAPG Special Volumes

... as spherical bodies which represent various stages; some specimens have a conical shape, and others, which are very scarce, are short tubular fascicles...

Microbial Biscuits of Vaterite in Lake Issyk-Kul (Republic of Kyrgyzstan)--Reply

Santiago Giralt, Ramon Julia, Jean Klerkx

Journal of Sedimentary Research (SEPM)

... section of these spherical forms, it is difficult to state that both spherical forms are identical. Vaterite occurrences reported by other authors show...

Compaction and Porosity Evolution of Pliocene Sandstones, Ventura Basin, California: REPLY

John C. Wilson, Earle F. Mcbride

AAPG Bulletin

... undergone moderate to strong compaction. Figure 1 shows the thin section view of uncompacted, randomly packed, spherical, sand-size grains of uniform...

Abstract: Abstract: The Effects of Energy Balanced Metamorphic Reactions and Far-Field Tectonic and Gravitational Forces on Basin Formation, by Hartz, E.H., Podladchikov, Y.Y., Medvedev, S., and Faleide, J.I.; #90066 (2007)

Search and Discovery.com

Abstract: Impact of Stress Perturbations nearby Salt Bodies on Fault Stability: Examples from Reservoir Geomechanics, by B. Orlic, J.D. van Wees, and F. Mulders; #90066 (2007)

Search and Discovery.com

Abstract: Organic-Matter Pores: New Findings from Lower-Thermal-Maturity Mudrocks; #90311 (2017)

Robert M. Reed

Search and Discovery.com

... organic-matter pore texture. Instead of consisting of a mass of organic matter with spherical holes, the organic-matter is a composite grain made up...

Acquiring Formation Pressure Data in Low Permeability Reservoirs as an Aid to Evaluating Reservoir Connectivity; #40422 (2009)

Peter Weinheber, Edward Boratko, E. Dussan, Marco Rueda, Adriaan Gisolf, Kilamba Diogo Contreiras, Francisco Van-Dúnem, and Robert Spaeth

Search and Discovery.com

...---with no formation response, varying only formation perm we get the following pressure build ups---We can then plot the spherical derivatives for each...

Outcrop Notes

F. G. Fox

CSPG Bulletin

... in small nodules and crystalline aggregates. In the bottom four feet there are numerous sub-spherical pyritic nodules up to eighteen inches in diameter...