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The AAPG/Datapages Combined Publications Database
Showing 173 Results. Searched 195,387 documents.
THE DEPOSITIONAL ENVIRONMENT AND PROVENANCE OF THE STRAVEN CONGLOMERATE KEMBER OF THE POTTSVILLE FORMATION
Terry E. Osborne,
Alabama Geological Society
... direction. In fluvial clast-supported conglomerates, pebbles and cobbles tend to dip upstream (A(t)B(i) fabric - A axis is transverse to flow and the B axis...
1991
Relationships Between Reservoir Petrography and Reservoir Behavior of Some Appalachian Oil Sands
J. C. Griffiths
Tulsa Geological Society
... analysis. The long (a) axis and short (b) axis of quartz grains measured in thin section and expressed in phi units are linearly related (Griffiths, et al...
1960
Sedimentology of the Upper Pennsylvanian Bigheart Sandstone Member, Tallant Formation, Pawnee and Osage Counties, Oklahoma
Ruiqian Chen, Robert W. Scott
Oklahoma City Geological Society
... the P50 distribution of the ratio between the b- and a- axis (Rittenhouse, 1943). This gives a 2D view of the shape of these grains. After calculating...
2012
Chapter 135: Canyon San Fernando, Baja California, Mexico: A Deepmarine Channel-levee Complex that Evolved from Submarine Canyon Confinement to Unconfined Deposition
Mason Dykstra, Ben Kneller
AAPG Special Volumes
... a-axis transverse, b-axis inclined and imbricated, and a-axis parallel and imbricated. Paleocurrent directions based on clast imbrications have a vector...
2007
Hyperconcentrated Flows and Gastroliths: Sedimentology of Diamictites and Wackes of the Upper Cloverly Formation, Lower Cretaceous, Wyoming, U.S.A.
Michael J. Zaleha, Shayne A. Wiesemann
Journal of Sedimentary Research (SEPM)
... to 50%. Most diamictites exhibit concentrations of pebbles and cobbles (3–5 cm, up to 7–8.5 cm, b axis) in poorly defined, discontinuous layers...
2005
Transverse Ribs: Their Characteristics, Origin and Paleohydraulic Significance
Emlyn H. Koster
Dallas Geological Society
..., “average spacing between ribs . . . average widths of ribs . . . and average b-axis of the ten largest stones in ribs.” On Spring Creek, the ten...
1977
Transverse Ribs: Their Characteristics, Origin and Paleohydraulic Significance
Emlyn H. Koster
CSPG Special Publications
..., “average spacing between ribs . . . average widths of ribs . . . and average b-axis of the ten largest stones in ribs.” On Spring Creek, the ten...
1977
Upper Pleistocene Facies Sequences and Relative Sea-level Trends Along the South Coast of Ireland
A. Marshall McCabe , Colm O'Cofaigh
Journal of Sedimentary Research (SEPM)
... channel (Figs. 3, 4A, B). LFAs 1, 2, 3, and 4 are exposed in sections perpendicular to the meltwater efflux axis (Fig. 3) and rest on a marine rock...
1996
F
John G. Dennis
AAPG Special Volumes
... for homogeneous domains. 1. For folds: The b direction is the direction parallel with the fold axis. The plane containing a and c, the ac plane, is then normal...
1967
Characteristics of Gravel Bars in Ephemeral Streams
Marwan A. Hassan
Journal of Sedimentary Research (SEPM)
... normally contributed less than 0.5% to the total sample weight. No samples exceeded the 2% criterion. Figure 3. Sample size versus b axis...
2005
Climatic and Tectonic Signature in the Fluvial Infill of a Late Pliocene Valley (Siena Basin, Northern Apennines, Italy)
Mauro Aldinucci, Massimiliano Ghinassi, Fabio Sandrelli
Journal of Sedimentary Research (SEPM)
... clasts with b axis > 1 cm, all collected from individual beds up to 50 cm thick along 2 m of outcrop; all clasts were broken and identified. Seven...
2007
Petrography-Porosity Relations in Carbonate-Quartz System, Gatesburg Formation (Late Cambrian), Pennsylvania
Richard E. Smith
AAPG Bulletin
... of a grain as observed in thin section. The short (b) axis is determined first because considerable variation is introduced by the difference in choice...
1969
MISSISSIPPIAN ROCKS IN THE SASKATCHEWAN PORTION OF THE WILLISTON BASIN: A REVIEW
DR. J.G.C.M. FULLER
Williston Basin Symposium
... dolomite. Poplar "B" dolomite 50 feet Dolomitized limestone...
1956
Analysis of Mesoscopic Structures at Mersing and Tanjung Kempit, Johore, Peninsular Malaysia
K. R. Chakraborty, Ian Metcalfe
Geological Society of Malaysia (GSM)
... (mesoscopic) may be dispersed along a small circle centred on the later fold axis (if the fold axis is the kinematic b-axis, e.g. flexural slip fold...
1984
Pre-Cambrian Geology of the Area Between Clay Basin and Browns Park in Utah and Colorado
Wallace R. Hansen
Wyoming Geological Association
..., a "b" axis lineation, is caused by tight folding and over wide areas is the only consistent structural element. Its orientation is notably uniform...
1955
Eocene Depositional Systems, San Diego, California
Martin H. Link, Gary L. Peterson, Patrick L. Abbott
Pacific Section SEPM
... up only a small percent of the strata, whereas sandstone and mudstone or shale make up the majority. Measurements of the b-axis of slump folds...
1979
Controls On the Genesis, Sedimentary Architecture, and Preservation Potential of Dryland Alluvial Successions In Stable Continental Interiors: Insights from the Incising Modder River, South Africa
Stephen Tooth, P. John Hancox, Dion Brandt, Terence S. McCarthy, Zenobia Jacobs, Stephan Woodborne
Journal of Sedimentary Research (SEPM)
..., and surface hardening. Individual gravel clasts are typically subangular to subrounded, range up to ∼ 20 cm (b-axis measurements), and include locally...
2013
Structural Analysis Along Torrens River, Alberta Foothills
E. L. Fitzgerald
CSPG Bulletin
... wavelengths of the "two" folds, a-lineations in the form of slickensides are oriented approximately normal to the curved B axis and indicate movements varying...
1963
Marine Sedimentology of the Early to Middle Eocene La Jolla Group
Jeffrey A. May, John E. Warme
Pacific Section SEPM
... probably took place in a d e e p - w a t e r c h a n n e l a n d l e v e e c o m p l e x . Characteristic features include a-axis i m b r i c a t i o n...
1991
Measurement and Geological Significance of Shape and Roundness of Sedimentary Particles
W. C. Krumbein
Journal of Sedimentary Research (SEPM)
... axis is indicated by setting FIG. 2. Measurement of pebble diameters. Left, the b-axis in position; center, the c-axis in position. Right, the pebble...
1941
Southeastern Extension of the Lake Basin Fault Zone in South-Central Montana: Implications for Coal and Hydrocarbon Exploration
Laura N. Robinson, Bruce E. Barnum
Rocky Mountain Association of Geologists
... is approximately N 6 3 O E, which corresponds with the B-B' axis of the strain ellipsoid. The trend of the basement wrench fault is approximately N 6 4...
1986
The Heavy Mineral Population within the Beach Sand Facies of the Meridian Sand Exposed in Mississippi
William R. Reynolds
GCAGS Transactions
... to a narrow elongation parallel to the b axis and broad elongation parallel to the a axis. Kyanite relief is moderate (1.71-1.73), but the indices...
1992
Ferruginized Surface Deposits from Natal and Zululand, South Africa
J. J. Frankel and P. Bayliss
Journal of Sedimentary Research (SEPM)
..., and appears to be replaced by goethite in all the described rocks in soil and sub-soil formation. Kaolin as the b-axis disordered polymorph (1Md...
1966
On the Origin of Ball Coals
D. Chandra, K. K. Chatterjee
Journal of Sedimentary Research (SEPM)
...------------------------ Method of study For the purpose of sphericity analysis the lengths of the three principal axes: long axis (a), intermediate axis (b...
1971
Stevensite Oolites from the Green River Formation of Central Utah
Rodney Tettenhorst, George E. Moore, Jr.
Journal of Sedimentary Research (SEPM)
... chemically as described later. The pattern from a backloaded powder mount (Figure 5) shows the material to be a smectite. The b-axis dimension...
1978