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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,636 documents.
Modern Cool-Water Beach Sands of Southwest England
John R. Merefield
Journal of Sedimentary Research (SEPM)
.... The regression line is a least-squares fit. TABLE 1. Carbonate mineralogy of modern beach sands of southwest England End_Page 417...
1984
Recognition and Significance of Inherited Quartz Overgrowths in Quartz Arenites
Ivan D. Sanderson
Journal of Sedimentary Research (SEPM)
... with visible signs of truncation, were calculated. Results of the experiment are shown in Figure 8, a least-squares regression in which s/p values are plotted...
1984
Morphology and Origin of an Erosion Surface Cut into the Bad Heart Formation During Major Sea-Level Change, Santonian of West-Central Alberta, Canada
A. Guy Plint, Roger G. Walker
Journal of Sedimentary Research (SEPM)
... the isopach data. A regular grid of data points was first set up by a weighted, moving least-squares analysis of the real data points in Figure 4. The grid...
1987
Storm-dominated Sedimentation on the Inner Shelf of the Canadian Beaufort Sea
Philip R. Hill , Odette C. Nadeau
Journal of Sedimentary Research (SEPM)
... of the transmissometer was obtained, despite the wide range of concentrations. Least squares regression analysis shows a linear relationship (Fig. 2...
1989
Bed Configurations in Steady Unidirectional Water Flows. Part 1. Scale Model Study Using Fine Sands
Lawrence A. Boguchwal , John B. Southard
Journal of Sedimentary Research (SEPM)
... by fitting least-squares straight lines through full centerline profiles--a method that itself introduced an error of a few percent in depth measurement...
1990
Flume Experiments on the Transport of Heavy Minerals in Gravel-Bed Streams
Roger A. Kuhnle , John B. Southard
Journal of Sedimentary Research (SEPM)
..., flow depth, and water-surface slope were measured during each set. Water-surface slope was found from a least-squares straight line through water...
1990
Reservoir Geology of the Taylor Sandstone in the Oak Hill Field, Rusk County, Texas: Integration of Petrology, Sedimentology, and Log Analysis for Delineation of Reservoir Quality in a Tight Gas Sand: Reservoir Characterization and Modeling
C. L. Vavra, M. H. Scheihing, J. D. Klein
AAPG Special Volumes
... compared to unstressed measurements. Least-squares regression of the data produces a well constrained (R2= 0.89) equation of the form: [EQUATION (1...
1991
Micritized Skeletal Grains in Northern Belize Lagoon: A Major Source of Mg-calcite Mud
R. Pamela Reid, Ian G. Macintyre, Jeffrey E. Post
Journal of Sedimentary Research (SEPM)
... composite powder diffraction pattern. This calculated pattern is compared on a point-by-point basis to the observed pattern and then using a least squares...
1992
Fabric Evolution and Mechanisms of Diagenesis in Fine-Grained Sediments from the Kita-yamato Trough, Japan Sea
Achim Kopf, Jan H. Behrmann
Journal of Sedimentary Research (SEPM)
... particles by a least-squares fit (Fig. 7B). Data qualit generally is tolerable if either the center of the plot (Fig. 7A) is free of points...
1997
Resolving Sedimentological Uncertainties Using Magnetostratigraphic Correlation: An Example from the Middle Jurassic of Burgundy, France
Kifaya N. Belkaaloul , Djafar M. Aissaoui , Michel Rebelle , Gerard Sambet
Journal of Sedimentary Research (SEPM)
... analysis (Kirschvink 1980) with linear segments fit by least-squares analysis with three or more points between 330° and 550°C for thermally cleaned...
1997
Multicomponent Analysis of FTIR Spectra: Quantification of Amorphous and Crystallized Mineral Phases in Synthetic and Natural Sediments
Jacques Bertaux , Francois Frohlich , Philippe Ildefonse
Journal of Sedimentary Research (SEPM)
......, M; i = 1,..., N] recorded in the same conditions (i.e., quartz, kaolinite,....): [EQUATION] Determination of the xj coefficients to obtain a least...
1998
Evaluation of Boron as a Paleosalinity Indicator and its Application to Offshore Prospects
C. T. Walker
AAPG Bulletin
... regression of boron on carbon calculated by the least squares method from data for marine limestone in Table I is [EQUATION] The parabolic...
1968
Petrology of Cretaceous Mowry Shale of Wyoming
John Clements Davis
AAPG Bulletin
.... Soc. America Bull., v. 73, p. 1437-1442. Peikert, E. W., 1963, IBM 7090 program for least-squares analysis of three-dimensional geological...
1970
Shallow Temperatures and Thermal Regime in the Hydrocarbon Province of Tierra del Fuego
Gary W. Zielinski , Peter M. Bruchhausen
AAPG Bulletin
... or more different depths are required) by least-squares fitting. Stepping through possible values of µ in discrete increments, a minimum root mean square...
1983
Petroleum Prospects of Benue Trough, Nigeria
Joseph I. Nwachukwu
AAPG Bulletin
...-generation temperatures were plotted against depth for four lithostratigraphic units and geothermal gradients as shown in Figures 6 and 7. The least...
1985
Hydrocarbon Generation and Migration Routes in the East Texas Basin
William A. Wescott, William C. Hood
AAPG Bulletin
... relationship for some east Texas counties. The solid line is the estimated geothermal gradient and the dashed line is the least squares regression best...
1994
Extension, Displacement, and Block Rotation in the Larger Gullfaks Area, Northern North Sea: Determined from Map View Restoration
Delphine Rouby , Haakon Fossen , Peter R. Cobbold
AAPG Bulletin
...., P. R. Cobbold, P. Szatmari, S. Demerican, D. Coelho, and J. A. Rici, 1993, Least-squares palinspastic restoration of regions of normal faulting...
1996
Structure and geomorphology of the Duchesne graben, Uinta basin, Utah, and its enhancement of a hydrocarbon reservoir
Alicia Groeger, Ronald Bruhn
AAPG Bulletin
.... A plane was then fit to the well intercepts of each marker bed in the 16 northernmost wells using linear, least squares regression (Davis, 1986...
2001
The effective source rocks in the Cambay basin, India
A. Banerjee, S. Pahari, M. Jha, A. K. Sinha, A. K. Jain, N. Kumar, N. J. Thomas, K. N. Misra, K. Chandra
AAPG Bulletin
... Kalol depression). Locations of the KLOL and GNDR fields are shown in Figure 3. The least squares best fit line was simulated using the EASY Ro program...
2002
Determination of the stable isotope composition and total dissolved solids of Athabasca oil sands reservoir porewater: Part 2. Characterization of McMurray Formation waters in the Suncor–Firebag field
Benjamin R. Cowie, Bruce James, Michael Nightingale, and Bernhard Mayer
AAPG Bulletin
... of the formation water. Care should be taken in interpretation of mixing lines generated by this method. Least-squares regression may not be entirely...
2014
Some Problems in Thermal History Studies
David Deming, Jeffrey A. Nunn, Steven Jones, David S. Chapman
Rocky Mountain Section (SEPM)
..., Aracas field data (Fig. 1b) are uncorrected. Least-squares regressions yield average geothermal gradients of 24 and 20 °C/km; respectively...
1990
End-Member Modeling of Siliciclastic Grain-Size Distributions: The Late Quaternary Record of Eolian and Fluvial Sediment Supply to the Arabian Sea and Its Paleoclimatic Significance
Maarten A. Prins, Gert Jan Weltje
Special Publications of SEPM
... weighted least decomposition of X obtained from constrained approximations to the singular value Weltje 1994 1997a Because the true number squares...
1999
Equilibrium of Form and Forces in Tidal Basins of Coast of Texas and Louisiana
W. Armstrong Price
AAPG Bulletin
... 5. The dispersions of the points are reasonably small in each graph, and statistical analysis by least squares shows that each satisfies the equation...
1947
Overburden Rock, Temperature, and Heat Flow: Chapter 9: Part II. Essential Elements
David Deming
AAPG Special Volumes
... of 21.6°C/km was derived by a least-squares regression. The implicit supposition is that the regression line (Figure 9.4) is a more accurate...
1994
Tests of Plate Tectonics: PART 2
A. A. Meyerhoff , Howard A. Meyerhoff
AAPG Special Volumes
... by A. Smith (1971) for various islands and peninsulas of the modern Mediterranean Sea violate the geology--absolutely. The least-squares fitting method...
1974