Grain Size Variation in the Millbrig K-Bentonite: An Investigation of Ordovician Eruption Dynamics Using Image Analysis

Y-S. Zhang, W. D. Huff

Pacific Section SEPM

..., they are not known to have produced the volume of fragmented magma observed in the Middle Ordovician bed. However, large magnitude eruptions may also...

Acid Insoluble Residues, Regressive-Transgressive Events, and Conodont Biostratigraphy in the Upper Cambrian and Lower Ordovician of Western Utah and Central Texas

James F. Miller

Pacific Section SEPM

... by a stromatolite bed with an unconformity at its top (Miller and others, 1982, Fig. 5). The overlying transgressive deposits fill small erosional...

INTERFINGERING OF THE FRONTIER FORMATION AND ASPEN SHALE, CUMBERLAND GAP, WYOMING

John M'Gonigle

Rocky Mountain Association of Geologists

...; accepted February 8, 1982. The Mou~toillGeologisl V. 19, 110 2 (April 1982), p. 59-61. The coal bed and equivalent carbonaccous shale represent...

ABSTRACT: Lateral and Vertical Variation in Plant Megafossil Assemblages in the Upper Freeport Coal Bed (Middle Pennsylvanian, West-Central Pennsylvania)

Richard B. Winston and Ronald W. Stanton

The Society for Organic Petrology (TSOP)

...ABSTRACT: Lateral and Vertical Variation in Plant Megafossil Assemblages in the Upper Freeport Coal Bed (Middle Pennsylvanian, West-Central...

The Sedimentology of the 'Begrih-Liang' Formation

Sriyanee de Silva

Geological Society of Malaysia (GSM)

... on its contents, is seen to be gley-like in the field, probably due to the high watertable in the region a. b. nodular bed subfacies has prominent...

Taphonomic Signature of Shell Accumulations in Cores: Indicator of Depositional Environments in Holocene Nearshore Sediments, West Central Florida

C. Kelly Cuffe, Ann E. Gibbs, Warren D. Allmon

GCAGS Transactions

... more detailed understanding of the range of shell bed types and recognition of these types in the geological record. Taphonomic signature...

Trace-Slip Faults

R. H. Beckwith

AAPG Bulletin

... with the fault dip. Trace-slip is the component of the slip parallel with the trace of a bed, vein, or other surface on the fault plane. Perpendicular...

An Underwater Flume: NOTES

Terence P. Scoffin

Journal of Sedimentary Research (SEPM)

..., transportation, and deposition of carbonate particles. Direct observations of the sea bed can rarely be made continuously; thus information on the behavior...

Correlation of Sentinel Butte Shale in Western North Dakota: DISCUSSION

Ray V. Hennen

AAPG Bulletin

... (100 feet). Structural data for beds south and west of Missouri River were reduced to an horizon at the top of a prominent "Marker bed" labelled "SS21...

Relationship of Flute-Cast Morphology to Internal Sedimentary Structures in Turbidites: DISCUSSION

J. R. L. Allen

Journal of Sedimentary Research (SEPM)

... the grain size and the Bouma class of the lowest division of the bed. Allen argued that erosion of the flutes would continue so long as the upward-acting...

On the Occurrence of Pleurodictyum in the Jentik Formation of Kampung Guar Jentik, Beseri, Perlis

Meor Hakif Hassan, Lee Chai Peng

Geological Society of Malaysia (GSM)

... rocks of Peninsular Malaysia. AGE AND STRATIGRAPHY The Pleurodictyum fossils were found within an approximately 1.3 m thick bed of sparsely...

Paleoflow Characteristics of a Late Cretaceous River in Utah from Analysis of Sedimentary Structures in the Ferron Sandstone: A Reply

Edward Cotter

Journal of Sedimentary Research (SEPM)

...., AND FAHNESTOCK, R. K., 1965, Stratification, bed forms, and flow phenomena (with an example from the Rio Grande): in G. V. Middleton (ed.), Primary...

Depositional Environment of the Sharon Conglomerate Member of the Pottsville Formation in Northeastern Ohio

John V. Mrakovich, Alan H. Coogan

Journal of Sedimentary Research (SEPM)

.... HARMS, J. C., AND R. K. FAHNESTOCK, 1965, Stratification, bed forms, and flow phenomena (with an example from the Rio Grande): in Middleton, G. V. (ed...

The Threshold of Sediment Movement Under Oscillatory Waves: A DISCUSSION

Ole S. Madsen, William D. Grant

Journal of Sedimentary Research (SEPM)

... of the sediment grains, g the acceleration due to gravity and um is the maximum near-bottom fluid velocity relative to the bed. The purpose...

Preface to Part II: Chapter 10: Part II. Secondary Migration and Accumulation of Petroleum, Compiled by Robert H. Dott and Merrill J. Reynolds

AAPG Special Volumes

... migration, from the source bed into a carrier bed or reservoir rock. Part II considers the reservoir rock and the trap as physical or geometric entities...

Subdivision of Pottsville Formation in Southern Anthracite Field, Pennsylvania

Gordon H. Wood, Jr. , J. Peter Trexler , Harold H. Arndt , Andy Yelenosky , Julian Soren

AAPG Bulletin

... or Twin coal bed. The Pottsville consists of a sequence of conglomerate, conglomeratic sandstone, siltstone, shale, and coal beds that is as much...

Devonian Magadi-Type Cherts in the Orcadian Basin, Scotland

John Parnell

Journal of Sedimentary Research (SEPM)

... of chert nodules and laminae occur at two stratigraphic levels 13.7 m and 59 m below an important marker horizon, the Sandwick Fish Bed (Fannin NGT...

Variations in Density of V-Shaped Impact Pits on Quartz Grains, with Size of Grains, Intertidal Sands, Bay of Fundy

G. V. Middleton, C. A. Kassera

Journal of Sedimentary Research (SEPM)

... populations. It is suggested that Vs are produced by grain impacts in a zone of high grain concentration close to the bed and that the low rate of V density...

Selective Entrainment and Transport of Mixed Size and Density Sands: Flume Experiments Simulating the Formation of Black-sand Placers

Michael Zhenlin Li, Paul D. Komar

Journal of Sedimentary Research (SEPM)

... Processes and Landforms, v. 8, p. 1-18. DAY, T.J., 1980, A study of initial motion characteristics of particles in graded bed material: Current Research...

"Subaqueous Shrinkage Cracks" in the Devonian of Scotland Reinterpreted: REPLY

T. R. Astin, D. A. Rogers

Journal of Sedimentary Research (SEPM)

... of Sedimentologists, Special Publication No. 13, p. 201-223. TREWIN, N.H., 1986, Palaeobiology and sedimentology of the Achanarras fish bed of the Middle Old Red...

Traction-Carpet Stratification in Turbidites--Fact or Fiction?: REPLY

Richard N. Hiscott

Journal of Sedimentary Research (SEPM)

... concentration moving bed, separated by an interface that sharpens with time (gravity transformation of Fisher 1983). I suspect that during rapid deposition...

Geologic Stereo Mapping of Geologic Structures with SPOT Satellite Data: REPLY

Zeev Berger

AAPG Bulletin

... the marker bed. The process of constructing the FSS map consists of four steps that are illustrated in Figure 1. The block diagram at the center...

Porosity loss, fluid flow, and mass transfer in limestone reservoirs: Application to the Upper Jurassic Smackover Formation, Mississippi (Discussion & Reply)

Discussion: S. N. Ehrenberg; Reply: Ezat Heydari

AAPG Bulletin

... an example calculated by Bjorlykke et al. (1988, p. 348) for a bed 10 m thick with 1000 md permeability, both bed and isotherms dipping at 15 degrees...

Abstract: Subaqueous Sandstones Deposited by Meltwater-Fed Density Flows in a Late Paleozoic Glaciomarine Succession, Eastern Paraná Basin, Brazil, by Fernando Farias Vesely; #90079 (2008)

Search and Discovery.com

Abstract: Ichnofabrics vs. Ichnofacies: A Field-Based Test of Spatial Recurrence in Shallow-Marine Successions; #90172 (2014)

James A. MacEachern, Kerrie L. Bann, Murray K. Gingras, S. George Pemberton, Shahin E.Dashtgard, Cindy D. Hansen, Lynn T. Dafoe, John Lerette, Nadine J. Pearson

Search and Discovery.com

... generalized to permit refined interpretations of facies. To the ichnofacies analyst, however, ichnofabric characterizations reflect only bed-scale...