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The AAPG/Datapages Combined Publications Database
Showing 1,687 Results. Searched 201,049 documents.
Silica Diagenesis, I. Solubility Controls
Loretta Ann Williams , George A. Parks, David A. Crerar
Journal of Sedimentary Research (SEPM)
.... , --Alexander (1957). Two precipitated amorphous silicas. Solid lines are least-squares regression fits to redigitized data. +--Crerar and others (1981...
1985
The Importance of Sea-Level Fluctuations in the Formation of Linear Conglomerate Bodies; Carrot Creek Member of Cardium Formation, Cretaceous Western Interior Seaway, Alberta, Canada
Katherine M. Bergman, Roger G. Walker
Journal of Sedimentary Research (SEPM)
... overlying erosion surface ES. Cored wells shown with solid triangles, other wells with open triangles. All wells contain at least a veneer of conglomerate...
1987
Classification of Large-Scale Subaqueous Bedforms: A New Look at an Old Problem-SEPM Bedforms and Bedding Structures
Gail M. Ashley, Symposium Chairperson
Journal of Sedimentary Research (SEPM)
... forms are dunes. FIG. 9B. A log-log plot of wind ripples () and eolian dunes () and the calculated least squares regression line compared to regression...
1990
Climatic Forcing of Cyclic Carbonate Sedimentation During the Last 5.4 Million Years Along the West Florida Continental Margin
Steven R. Roof , Henry T. Mullins, Steven Gartner, T. C. Huang, Ed Joyce, John Prutzman, Leonard Tjalsma
Journal of Sedimentary Research (SEPM)
... the residuals from a least squares linear regression estimate. The program next subsamples the data set (at the original resolution) to produce a constant...
1991
Evidence for a Tidally Influenced Upper Carboniferous Ombrogenous Mire System: Upper Bench, Beckley Bed (Westphalian A), Southern West Virginia
James R. Staub, Joan S. Esterle
Journal of Sedimentary Research (SEPM)
.... All logs were matched with adjacent logs using a visual "least squares" best fit method (Galloway 1972) to assess lateral variability due...
1992
Longshore Grain Sorting and Beach Placer Formation Adjacent to the Columbia River
Michael Zhenlin Li, Paul D. Komar
Journal of Sedimentary Research (SEPM)
..., differing only in the rate at which m decreases with the effective-density ratio (EDR). The empirical curve fitted by least-squares regression to our...
1992
Fourier and Autocorrelation Analysis of Estuarine Tidal Rhythmites, Lower Breathitt Formation (Pennsylvanian), Eastern Kentucky, USA
Ronald L. Martino, Dewey D. Sanderson
Journal of Sedimentary Research (SEPM)
... for analysis. Additionally, the locality 3 data appear to be noisier. An exponential least squares regression curve was fitted to the data...
1993
Origin of Dolomite in the Phosphatic Miocene Hawthorn Group of Florida
John S. Compton , Donald L. Hall , David J. Mallinson , David A. Hodell
Journal of Sedimentary Research (SEPM)
... 0.003° 2 steps for 5 seconds per step to calculate the unit cell parameters a and c of dolomite by the least-squares cell refinement program LCLSQ...
1994
The Role of Magnesium in the Crystallization of Calcite and Aragonite in a Porous Medium
Lurdes Fernandez-Diaz , Andrew Putnis , Manuel Prieto , Christine V. Putnis
Journal of Sedimentary Research (SEPM)
... 508V Guinier viewer. The lattice parameters of the different samples were refined using between 12 and 22 reflections and a least-squares program CELL...
1996
Rb-Sr Ages of Diagenesis of Mg-rich Clay in Permian Sediments, Palo Duro Basin, Texas Panhandle, U.S.A.
Leon E. Long , Mark E. Erwin , , R. Stephen Fisher
Journal of Sedimentary Research (SEPM)
... of Economic Geology, Report of Investigations No. 147, 81 p. YORK, D., 1966, Least-squares fitting of a straight line: Canadian Journal of Physics, v...
1997
Crustal Structure and Rift-Drift Evolution of the Newfoundland Basin: Chapter 16: North American Margins
Brian E. Tucholke, James A. Austin Jr., Elazar Uchupi
AAPG Special Volumes
... = 1.56, K = 1.26 and t = one-way travel time in sec). V0 and K were determined by least-squares fit to MCS sediment interval velocities determined...
1989
Identifying the Controls Over Downstream Fining of River Gravels
Trevor B. Hoey, Brian J. Bluck
Journal of Sedimentary Research (SEPM)
.... The conversion equations obtained (Table 1) were obtained by ordinary least-squares log-log regression. Percentiles obtained from all 122 surface counts were...
1999
Responses of Stable Bay-Margin and Barrier-Island Systems to Holocene Sea-Level Highstands, Western Gulf of Mexico
Robert A. Morton , Jeffrey G. Paine , Michael D. Blum
Journal of Sedimentary Research (SEPM)
... is described by a least-squares polynomial regression of data points or the position of individual peat samples is taken as the best proxy for sea level...
2000
Basic Types of Submarine Slope Curvature
Erwin W. Adams , Wolfgang Schlager
Journal of Sedimentary Research (SEPM)
... and correlation coefficients from nonlinear least-squares regression (e.g., Davis 1986). Figure 3A shows a slope profile best described...
2000
Origin and Growth Mechanism of Authigenic Chlorite in Sandstones of the Lower Vicksburg Formation, South Texas
Jeffry D. Grigsby
Journal of Sedimentary Research (SEPM)
...% of a least-squares linear regression. Following this approach, the average 18O is approximately -7.2o/oo (PDB) (Fig. 5). Chlorite Cement Occurrence...
2001
Regional Assessment of Suitability of Organic-Rich Gas Shales for Carbon Sequestration: An Example from the Devonian Shales of the Illinois and Appalachian Basins, Kentucky
Brandon C. Nuttall, James A. Drahovzal, Cortland F. Eble, R. Marc Bustin
AAPG Special Volumes
... the analysis presented in Figure 8, the least squares linear regression equation used for modeling CO2 adsorption capacity isGamma-ray and density...
2009
Fingerprints of Fluid Flow: Chemical Diagenetic History of the Jurassic Navajo Sandstone, Southern Utah, U.S.A.
Brenda Beitler, W.T. Parry, Marjorie A. Chan
Journal of Sedimentary Research (SEPM)
... a linear, least-squares fit of whole-rock chemistry, mineral composition, and mineral mass abundance (Parry et al. 1980). In addition to this regional sample...
2005
Seismic Geomorphology and Evolution of Submarine Channels from the Angolan Continental Margin
M.J.R. Gee, R.L. Gawthorpe, K. Bakke, S.J. Friedmann
Journal of Sedimentary Research (SEPM)
... an artificial surface (least squares, spline curvature) across the top of the channel valley (Fig. 3), taking into account any levee development...
2007
Structural Analysis Using Spatial Filtering in Interior Plains of South-Central Alberta
J. E. Robinson , H. A. K. Charlesworth , M. J. Ellis
AAPG Bulletin
... Alberta: Saskatchewan Dept. Mineral Resources Rept. 53, 17 p. Agnocs, W. B., 1951, Least squares residual anomaly determination: Geophysics, v. 16, p...
1969
Structure of Upper Cenozoic Strata Beneath Kodiak Shelf, Alaska
Michael A. Fisher, Roland Von Huene
AAPG Bulletin
.... Structure contours of horizon C in Albatross basin. Location of map is shown in Figure 1. End_Page 1018------------------------------ least-squares...
1980
Petroleum-Related Origin for Uraniferous Organic-Rich Nodules of Southwestern Oklahoma
Joseph A. Curiale , Salman Bloch , Janina Rafalska-Bloch , William E. Harrison
AAPG Bulletin
... of the samples listed in Table 2. A least squares regression line is drawn through the points. It may be of some significance that a decrease in H/C ratio...
1983
Tectonic Evolution of Gulf of Anadyr and Formation of Anadyr and Navarin Basins
Michael S. Marlow, Alan K. Cooper, Jonathan R. Childs
AAPG Bulletin
... plot were fit by least squares (Fig. 9). Except for the deepest refractors, each data set is highly linear. The resulting best-fit lines for Anadyr...
1983
Stratigraphic Evolution of Blake Outer Ridge
R. G. Markl , G. M. Bryan
AAPG Bulletin
...] A least-squares fit of the sonobuoy data to this equation yielded a (v0, k) pair for each layer. The overburden contributed by the nth layer...
1983
Influence of Paleoenvironmental Factors on Preservation of Organic Matter in Middle Cretaceous Greenhorn Formation, Pueblo, Colorado
Lisa M. Pratt
AAPG Bulletin
... least-squares fits of the data from the macroburrowed samples and the microburrowed to laminated samples. Fig. 5. Plot of hydrogen indices vs. oxygen...
1984
A New Approach to Shale Compaction and Stratigraphic Restoration, Beaufort-Mackenzie Basin and Mackenzie Corridor, Northern Canada (1)
D. R. ISSLER
AAPG Bulletin
... IMAGE) for i = 1, 2, ... n data points. A least squares fit to the data yields an acoustic formation-factor exponent of 2.19 and a matrix transit time...
1992