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The AAPG/Datapages Combined Publications Database
Showing 1,463 Results. Searched 196,121 documents.
Provenance and Diagenesis of the Cherokee Sandstones, Deep Anadarko Basin, Western Oklahoma
Stephen Douglas Levine
Oklahoma City Geological Society
.... First order best fit curves were added to these plots by using a least squares program. PETROLOGY OF THE CHEROKEE SANDSTONE Red Fork Sandstone Texture...
1985
Compositional Variation and Sequence in the Miocene Monterey Formation, Santa Barbara Coastal Area, California
Caroline M. Isaacs
Pacific Section SEPM
... of the Monterey Formation. The correlation coefficient for linear regression by the least squares method is -0.8 for silica, +0.8 for detrital minerals, and +0.6...
1983
An Analysis of Joint Development in Thick Sandstone Beds of the Elk Basin Anticline, Montana-Wyoming
Terry Engelder, Michael R. Gross, Paul Pinkerton
Rocky Mountain Association of Geologists
... in Figure 7a, there is scatter about the least-squares fit line representing an FSI in the backlimb of Elk Basin. Aside from scatter arising from...
1997
Geologic Interpretation of Gravity Anomalies of Northeastern Utah
James T. Smith, Kenneth L. Cook
Utah Geological Association
... anomaly in the southern flank of the Uinta Basin. The high is at least 65 mi in length and extends eastward to the edge of the map, and continues...
1985
Scaling the Response of Deltas To Relative-Sea-Level Cycles By Autogenic Space and Time Scales: A Laboratory Study
Lizhu Yu, Qi Li,, Kyle M. Straub
Journal of Sedimentary Research (SEPM)
...We subtract this long-term trend, estimated with a least-squares linear regression of the growth of , to analyze the influence of sea-level cycles in pe...
2017
XRF-based Chemostratigraphy Between and Across Two Disconformities in the Ordovician Trenton Group and Utica Shale of Central New York, U.S.A.
Jeffrey T. Pietras, Ethan B. Spiegel
Journal of Sedimentary Research (SEPM)
... between observed and calculated spectra using a least-squares regression (cf. Mumme et al. 1996). XRF Semiquantitative X-ray fluorescence (XRF...
2018
Unusual fossiliferous concretions from lacustrine deposits in the lower Jurassic Moenave Formation in St. George, Utah, USA: implications for ancient fish mass mortalities
Allison R. Vitkus, Karen Chin, James I. Kirkland, Andrew R.C. Milner, Edward L. Simpson, Eric T. Ellison
PALAIOS
... hyperspectral Raman images by creating a least-squares model of end-member spectra from selected areas within the image. 82 PA L A I O S A.R. VITKUS ET AL...
2020
The high-magnesium calcite origin of nummulitid foraminifera and implications for the identification of calcite diagenesis
Laura J. Cotton, David Evans, Simon J. Beavington-Penney
PALAIOS
... least squares linear regression, with confidence intervals in dashed lines. Data from Dauphin (1999)—coralline algae, brachiopods, sea urchins...
2020
Solving the puzzle of the bivalve shell fragment: inferring the original abundance and size frequency from the fragmented record
Eric N. Powell
PALAIOS
...; Warton et al. 2006; least normal squares method of Troutman and Williams 1987) to define the regression parameters: lengthwidth, length-thickness, width...
2020
Structure of Extensionally Rifted Crust Beneath the Western Ross Sea and Iselin Bank, Antarctica, from Sonobuoy Seismic Data
A. K. Cooper, F. J. Davey, G. R. Cochrane
Circum Pacific Council Publications
... determinations from four representative sonobuoy stations (Figs. 1 I B - 1 I E ) . T h e least-squares curves in Figure 1 1 A give the average depth...
1987
Absence of evidence of climate-driven cycles in Carboniferous deposits of Joggins, Nova Scotia, Canada: influence of salt withdrawal tectonics on deposition and pedogenesis
Yohan Letourmy, Steven G. Driese, Justin R. Sims
Journal of Sedimentary Research (SEPM)
... least-squares methods. The value of n is known as the order of the TAR model and represents the number of immediately preceding FACs to be used...
2021
Development of Concepts of Regional Ground-Water Flow in the Part of the Great Basin in Eastern Nevada and Adjacent California and Western Utah – a Review
Joseph S. Gates
Utah Geological Association
... of recharge and discharge from springs and by evapotranspiration; and it uses a nonlinear least-squares regression technique to estimate model parameters...
2004
Review of the Petrology and Geochemistry of the Miocene Conejo Volcanics of the Santa Monica Mountains, California
Peter W. Weigand, Karen L. Savage
Pacific Section SEPM
..., University of California, 157 p. Bryan, W. B., Finger, L. W., and Chayes, F., 1969, Estimating proportions in petrographic mixing equations by least-squares...
1993
Recognition of Transgressive and Post-Transgressive Sand Ridges On The New Jersey Continental Shelf
W. L. Stubblefieldi, D. W. McGrail, D. G. Kersey
Special Publications of SEPM
... of the bottom topography in the cross shelf profiles Bathymetric input data consisted of a depth at 300 m intervals along each profile line A least squares method...
1984
HIGH-K CALC-ALKALINE PLUTONIC ROCKS FROM SOUTHEASTERN CALIFORNIA
P.A. Mueller, P.C. Ragland, W.A. Ranson, B.C. Burchfiel
Rocky Mountain Association of Geologists
... r s i t y , Houston, Texas, 32 pages. York, D., 1966, Least squares f l t t l n g of s t r a i g h t lines: Canadian Jour. Physics, V. 44, p...
1979
THE COLORADO EARTHQUAKE OF NOVEMBER 7,1882: SIZE, EPICENTRAL LOCATION, INTENSITIES, AND POSSIBLE CAUSATIVE FAULT
Robin K. McGuire, Alan Krusi, Sherry D. Oaks
Rocky Mountain Association of Geologists
... estimated and magnitudes determined. These data are plotted on Figure 2. A least-squares line fit to these data yields the equation: M = 0.08 + 1.12...
1982
Rhenium-Osmium Geochronology and Geochemistry of the Permian Brushy Canyon Formation: Investigating the Controls of Re and Os Abundances in Organic-Rich Shales and the Evolution of Permian Seawater
Shawn Wright, Alan Brandon, John Casey
Unconventional Resources Technology Conference (URTEC)
..., 3458-3475. York D. (1969) Least-squares fitting of a straight line with correlated errors. Earth and Planetary Science Letters 5, 320-324. Zelt F.B....
2017
Geochemistry and Origin of Middle Miocene Volcanic Rocks from Santa Cruz and Anacapa Islands, Southern California Borderland
Peter W. Weigand
Pacific Section SEPM
... equations by least-squares approximation. Science 163:926-927. Butler, J. C. and A. Woronow. 1986. Discrimination a m o n g t e c t o n i c s e t t i n g...
1994
Graphic Correlation of Plio-Pleistocene Sequence Boundaries, Gulf of Mexico: Oxygen Isotopes, Ice Volume, and Sea Level
Ronald E. Martin, Ruth R. Fletcher
Special Publications of SEPM
... the composite based on ODP Core 625B Fig 12 proves instructive Martin and others l990a originally fitted the LOC for Core E67 135 using a Least Squares...
1995
Physics-Driven Optimization of Drained Rock Volume for Multistage Fracturing: Field Example from the Wolfcamp Formation, Midland Basin
Sergei G. Parsegov, Kiran Nandlal, David S. Schechter, Ruud Weijermars
Unconventional Resources Technology Conference (URTEC)
... as: 𝑁 𝑝 (𝑡) = 𝑞 𝑎 𝑡 𝑚 (9) Based on historical production data parameters a, m, q∞, and qi can be determined using the least squares fit method...
2018
Geochemical Methods for the Quantitative Evaluation of the Petroleum Potential of Sedimentary Basins
A. E. Kontorovich
AAPG Special Volumes
... from empirical data by the least-squares method. The values of these parameters as determined by A.S. Fomicheve and myself for several regions of West...
1984
Zeolite minerals from the North Shore of the Minas Basin, Nova Scotia
Georgia Pe-Piper, Lisa Miller
Atlantic Geology
... 1973. Job 9214: indexing and least squares refinement of powder diffraction data. U.S. Dept. of Commerce, NTIS Document, PB-21188. Aumento, F. 1966...
2002
Integrated Study of Ancient Delta-Front Deposits, Using Outcrop, Ground-Penetrating Radar, and Three-Dimensional Photorealistic Data: Cretaceous Panther Tongue Sandstone, Utah, U.S.A.
Cornel Olariu, Janok P. Bhattacharya, Xueming Xu, Carlos L.V. Aiken, Xiaoxian Zeng, George A. Mcmechan
Special Publications of SEPM
... model is a simplified model which does not include radial and tangential distortions made by camera lenses. Therefore, a least-squares method is used...
2005
Varve Formation in the Central Gulf of California: A Reconsideration of the Origin of the Dark Laminae from the 20th Century Varve Record: Chapter 30: Part V. Physical Oceanography, Primary Productivity, Sedimentology
Tim R. Baumgartner, Vicente Ferreira-Bartrina, Pedro Moreno-Hentz
AAPG Special Volumes
... different stations were standardized independently. Table 3 summarizes the statistics of the least squares fits obtained by linear regression of the total...
1991
Origin and Source-Rock Potential of the Sharon Springs Member of the Pierre Shale, Colorado and Kansas
Donald L. Gautier, Jerry L. Clayton, Joel S. Leventhal, Nancy J. Reddin
Rocky Mountain Association of Geologists
... of the linear least-squares line shown in Figure 4. According to this plot, the Sharon Springs samples contain predominantly Type II organic matter...
1984