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The AAPG/Datapages Combined Publications Database
Showing 3,149 Results. Searched 197,312 documents.
A Mineral Variation Series of Beach Sands from Cedar Point, Ohio
F. J. Pettijohn, J. D. Ridge
Journal of Sedimentary Research (SEPM)
...------------------------- and diopside, due to the fiat form of the cleavage fragments, stands in contrast to the more spherical (though angular...
1933
Memorial: Stanley E. Slipper (1890-1982)
Samuel Aubrey Kerr
AAPG Non-Technical and Memorials
... to be allowed to enter fourth year with Spherical Trigonometry lack (?), having been prevented by low water on the Skeena River from returning in time...
1983
Coastal Paleokarst Near the Ordovician-Silurian Boundary, Manitoulin Island, Ontario
David R. Kobluk
CSPG Bulletin
... and fungi or lichens grow where the rock is wetted by wave splash or spray (Schneider, 1976). Holocene karsts, including coastal Karren, are the subject...
1984
Pegmatites from the Southern Part of the Western Foothills of Gunung Benom, Pahang
T. T. Khoo
Geological Society of Malaysia (GSM)
... accessory amounts of tiny spherical grains which are isotropic and have very high relief. It is thought that these grains are spinel but Dr Jaafar...
1976
Investigating Microstructural Heterogeneity in Organic Shale via Large-Scale, High-Resolution SEM Imaging
Hung T. Tran, Jeremy D. Jernigen, Mark E. Curtis, Carl H. Sondergeld, Chandra S. Rai
Unconventional Resources Technology Conference (URTEC)
... pore body radii assuming spherical pores (Curtis et al., 2010; Giffin et al., 2013; Goral et al., 2015). Do these 3D observations translate into 2D...
2017
Calcite Oolites or "Cave Pearls" Found in the "Cave of the Mounds"
Alonzo W. Pond
Journal of Sedimentary Research (SEPM)
... table) between the limits of 2.1 and 4.4 min. in diameter. In shape they are lenticular, spherical or cylindrical. Five show slight depressions...
1945
An Ornamented Polyframboid from the Stanniferous Placers of Ayer Hitam, Selangor, Peninsular Malaysia
K. F. G. Hosking
Geological Society of Malaysia (GSM)
... CAL NOT ES ) ~ ORNMNlED POLVFIWBOID FROM THE STANNIFEROUS PLACERS OF AVER HITAM, SELANOOR, PENINSULAR MtuVSIA K.F.G. HOSKING, Camborne School of Mines...
1980
Beryllium Minerals
Robert E. Cohenour, Max Erickson
Utah Geological Association
... silicate (Mn4Be3Si3O12·S) containing from 10.5 to 15.0 per cent beryllium oxide. Helvite crystallizes as tetrahedrons and in spherical masses that have...
1963
Distorted Oolites and Pseudoolites
Albert V. Carozzi
Journal of Sedimentary Research (SEPM)
..., No. 21, p. 363-379. End_of_Record - Last_Page 274------- In this paper an oolite is defined as a spherical or subspherical body, 0.25 to 2 mm...
1961
Transformation of Weight--and Number--Frequencies for Phi-Normal Size Distributions: NOTES
Basanta K. SAHU
Journal of Sedimentary Research (SEPM)
... approximate. THEORY The weight of N spherical particles with constant diameter (x in mm.) and with uniform density ( in gm./cm3) is given by, W(in gm...
1965
Collophane Associated with the Unconformity at the Base of the Devonian Onondaga Limestone in New York State: NOTES
Kenneth J. Mesolella
Journal of Sedimentary Research (SEPM)
.... The average nodule is two to three inches in diameter with some attaining a diameter of as much as six inches. Many of the nodules are nearly spherical...
1966
Calculating the True Thickness of a Folded Bed: GEOLOGICAL NOTES
G. D. Hobson
AAPG Bulletin
... that if the local curvature is spherical, or at least circular in the dip direction, the direction of dip will be the same at the top and bottom of the bed. Any...
1942
Dolomite Porosity in Devonian of West Texas Permian Basin: GEOLOGICAL NOTES
T. S. Jones
AAPG Bulletin
.... Fauna obviously Silurian or Devonian, most closely resembling that Helderberg group, lower Devonian. However, brown spherical spores were found...
1944
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...
1997
So-called Turbidite Structures: NOTES
Ph. H. Kuenen
Journal of Sedimentary Research (SEPM)
... a completely closed bag that has turned over at least once, but bulbous anticlines or synclines, cut so as to show a more or less spherical or elliptical...
1968
Development of Cavernous Sediment in a Non-beach Environment: NOTES
Ronald D. Stieglitz, Richard F. Inden
Journal of Sedimentary Research (SEPM)
.... Individual visicles range in diameter from millimeter to [3]/[4] centimeter and have smooth interior surfaces. Most are ellipsoidal or spherical...
1969
Settling Convection and Grain Size Analysis: DISCUSSION
David J. A. Williams
Journal of Sedimentary Research (SEPM)
... spherical leads to overstimates of K. Although K is a somewhat arbitrary constant (an independent measure of u0 is difficult), it remains a useful...
1969
Reduction of Porosity in Baram Sandstones: Compaction vs Cementation (Poster 1)
Abdul Hadi Abd. Rahman
Geological Society of Malaysia (GSM)
... "" Late Miocene) display successions dominated by thick swaley cross-stratified (SCS) sandstones and other associated shallow marine, wave and storm...
2001
Peat Balls In Late-holocene Sediments of Essex, England
J. Trevor Greensmith, E. Vivian Tucker
Journal of Sedimentary Research (SEPM)
...). The 'balls' range in diameter from a few cm to 0.5 m and are usually rounded; some are almost circular in cross-section (Fig. 2B). Several are sub-spherical...
1973
A Visual Measure of Shingle Particle Form for Use in the Field
Roger S. Crofts
Journal of Sedimentary Research (SEPM)
.... Cailleux's FIG. 1. Visual shape/roundness matrix. The six basic particle shapes--very spherical ... very flat--and the six basic particle outlines--well...
1974
Fabric Anomaly in Mud Clast Distribution in the Lambir Formation (Mid to Late Miocene), Sarawak (Geology Paper 22)
E. Padmanabhan, A. S. Mohd Pauzi
Geological Society of Malaysia (GSM)
... to seismic anisotropy caused by change in wave velocity and polarization with propagation direction. Therefore, the study was to evaluate...
2011
X-Ray Radiography of Coal
Robert Vinopal
Journal of Sedimentary Research (SEPM)
... lower portion of sample contains less mineral matter. D) Pennsylvanian banded anthracite possessing numerous spherical mineral matter bodies...
1979
Distribution and Origin of Magnetite Spherules in Air, Waters, and Sediments of the Greater New York City Area and the North Atlantic Ocean
John H. Puffer, Emily W. B. Russell, Michael R. Rampino
Journal of Sedimentary Research (SEPM)
.... Puffer, Emily W. B. Russell, Michael R. Rampino 1980 Vol. 50 No. 1. (March), Perfectly spherical sand to clay size particles composed of magnetite...
1980
Transport Processes in Ooid Genesis
Paul L. Heller , Paul D. Komar, David R. Pevear
Journal of Sedimentary Research (SEPM)
... spherical cortex is developed either around a long, thin fossil fragment or on a more equant nucleus. Generally, the FIG. 1. [Grey Scale...
1980
Introduction
Richard H. Merkel
AAPG Special Volumes
... that formations are not generated from spherical type structure, and the irregular shapes of the formation will reduce its porosity. Normal porosity...
1979