Populations, Trends, and Cycles in Combined-Flow Bedforms

Indranil Banerjee

Journal of Sedimentary Research (SEPM)

... the symmetric field is gradational. Abrupt increase in bedform size, such as that which occurs between `ripples and dunes' in unidirectional flow has...

Eocene Depositional Systems and Tectonic Framework of West-Central New Mexico and Eastern Arizona: Part IV. Southern Rocky Mountains

S. M. Cather , B. D. Johnson

AAPG Special Volumes

... large, symmetric, channel-shaped sandstone units that have erosional bases. Channels may be as much as 15 m wide and 5 m deep, but are generally much...

Weibull vs. Lognormal Distributions for Fluvial Gravels

G.M. Kondolf , A. Adhikari

Journal of Sedimentary Research (SEPM)

... fluvial gravels resemble lognormal distributions but are skewed rather than symmetric, and thus may be better modeled using hyperbolic functions (Bagnold...

AAPG Studies in Geology No.53 - Part 1: Structural Interpretation Methods

John H. Shaw, Christopher D. Connors, and John Suppe

AAPG Special Volumes

... these structures. The trishear zone (a-b-c) is bound by two surfaces that define an intervening apical angle. The surfaces may or may not be symmetric...

The Origin of Consolidation Laminae and Dish Structures in Some Deep-Water Sandstones

Andrew Hurst, Bryan T. Cronin

Journal of Sedimentary Research (SEPM)

... smaller and more symmetric in cross section. The limited width of core makes it equally difficult to define any transition, if present, between...

Report on 1964 Chatham Mud Island, Erin Bay, Trinidad, West Indies

G. E. Higgins , J. B. Saunders

AAPG Bulletin

... to as Chatham Island. On the morning of August 4 the writers made their first landing on the island. The silhouette from the east was symmetric...

Newport-Inglewood Trend, California--An Example of Wrenching Style of Deformation

T. P. Harding

AAPG Bulletin

... symmetric, and plunges away from the fault on either side; it has a curvilinear profile which implies a compressive genesis. The regional fault zone cuts...

Melange (Olistostrome) near Lago Titicaca, Peru

Kees A. De Jong

AAPG Bulletin

... also are folded, but in a much more open and symmetric way. Newell (1949) ascribed this difference in tectonic style to a difference in the behavior...

Event Correlation in Upper Silurian Rocks of Somerset Island, Canadian Arctic

O. A. Dixon , G. M. Narbonne , B. Jones

AAPG Bulletin

.... "Event correlation," as discussed by Ager (1973, p. 63-65), is based on the correlation of corresponding peaks of symmetric sedimentary cycles which...

Wave-, Tide-, and Current-Controlled Sandbodies of Miocene Molasse, Western Switzerland

Peter Homewood , Philip Allen

AAPG Bulletin

... in generally symmetric cycles 10 to 50 cm thick in an analogous fashion to the bottomsets of tidal sand waves in the coastal facies and most likely reflect...

Seismic Stratigraphy of Early Pennsylvanian Morrowan Sandstones, Minneola Complex, Ford and Clark Counties, Kansas

Stacy L. Clark

AAPG Bulletin

... for more than 1-1.5 mi (2-2.4 km). In addition, the sandstones are symmetric and lenticular or pod-like rather than asymmetric and teardrop...

Geology of a Continental Slope Oil Seep, Northern Gulf of Mexico

E. William Behrens

AAPG Bulletin

... symmetric and form a crestal graben (Figure 8). The ridge bearing this graben continues northeastward, becoming the upwarp without unit (a), and therein...

Swanson's 30-40-30 rule

A. Hurst, G. C. Brown, R. I. Swanson

AAPG Bulletin

... the mean of such a positive skewed distribution as the lognormal, were actually found empirically by computer simulation. Figure 1. Symmetric triangular...

Three-dimensional visualization of the Neogene structures of an external sector of the northern Apennines, Italy

Mauro De Donatis

AAPG Bulletin

... of thrusts and back thrusts overlain by roughly symmetric pop-up structures producing a low critical taper for the thrust wedge...

Three-dimensional structural model of the Painter and East Painter reservoir structures, Wyoming fold and thrust belt

Joseph D. Dischinger, Shankar Mitra

AAPG Bulletin

... Formation folded into a pair of symmetric detachment folds with a high wavelength-amplitude ratio as a result of frictional resistance along the Absaroka...

Static connectivity of stacked deep-water channel elements constrained by high-resolution digital outcrop models

Allie Jackson, Lisa Stright, Stephen M. Hubbard, and Brian W. Romans

AAPG Bulletin

..., a relatively symmetric cross-sectional shape and fill pattern (Figure 5C). At Laguna Figueroa, channel elements are observed to laterally change facies from...

Abstract: AVAZ Inversion for Fracture Orientation and Intensity: a Physical Modeling Study; #90187 (2014)

Faranak Mahmoudian and Gary F. Margrave

Search and Discovery.com

.... The matrix W is symmetric, and therefore orthogonality diagonalizable (e.g., Lax, 1997). By computing the eigenvalues, λ1,2 = 0.5 (W11 + W22 ) ± 2 (W11...

Tide-Dominated Facies Complex at Southern Terminus of Sunburst Sea, Cretaceous Kootenai Formation, Great Falls, Montana, by Robert K. Schwartz and Susan M. Vuke, #50045 (2007).

Search and Discovery.com

Distortion of the Salt-Cored Fold System and Its Effects upon Abyssal Plain Sedimentary Processes in the Cilicia-Adana Evaporitic Basin, the NE-Mediterranean, by Mustafa Toker, Vedat Ediger, And Graham Evans, #30054 (2008).

Search and Discovery.com

Computer Simulation of the Yates Formation (Permian, Delaware Basin) - Sequence Stratigraphy and Shelf-to-Basin Correlation Implications

J.M. Borer and P.M. Harris

Search and Discovery.com

.... Perhaps more important is that modeling suggests asymmetric depositional cycles of the Yates may have formed from symmetric shusoidal sea-level...

Sequence Stratigraphic Update of the 3-Series of the Troll Field; #20133 (2012)

Thomas-Ideh Osivwi

Search and Discovery.com

... ranging from spit system into deflected wave-influenced delta through asymmetric wave influenced delta and symmetric wave-influenced deltas with decreasing...

Origin of Botryoidal Dolostone of the Sinian Dengying Formation in Sichuan Basin, China; #51101(2015)

Jie Zhang, Brian Jones, Anjiang Shen, Liyin Pan, Jingao Zhou

Search and Discovery.com

... or cutting across bedding; (2) Symmetry. The pore-filling dolomites grew from the margin to the center and formed symmetric zones; and (3) Gravitational...

Mixed-Energy, Coupled Storm-Flood Depositional Model: Application to Miocene Successions in the Baram Delta Province, NW Borneo, #51133 (2015).

Daniel S. Collins, Howard D. Johnson, Peter A. Allison

Search and Discovery.com

...) Presenter’s notes: Gutter casts show a wide range of geometries, from symmetric to asymmetric and steep to overhanging walls, which indicate rapid infill...

Depositional Controls and Sequence Stratigraphy of Lacustrine to Marine Transgressive Deposits in an Active Rift Basin, Lower Cretaceous Bluff Mesa, Indio Mountains, West Texas, #10954 (2017).

Andrew T. Anderson, Katherine A. Giles, Richard Langford

Search and Discovery.com

... modified from Claypool et al. (1980). Symmetric wave ripples in a finegrained sandstone Bladed silica cement that has replaced gypsum in a septarian...

Silurian Reef Systems in the Illinois and Michigan Basins - What can be Learned from Modern Quarrying Operations in North-Central Indiana, #51343 (2017).

Dennis R. Prezbindowski, Benjamin Dattilo, Jon Havens, Rick Lucas

Search and Discovery.com

... and Related Oil Production in Southern Illinois This model implies:   Vertical Growth  Symmetric Geometry Suggests Cyclic Growth and Uniformity...