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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,639 documents.
Analysis of global navigation satellite system data along the Southern Gas Corridor and estimate of the expected displacements
Giuliana Rossi, Riccardo Caputo, David Zuliani, Paolo Fabris, Massimiliano Maggini, and Panagiotis Karvelis
Environmental Geosciences (DEG)
..., it is robust, well tested, and of widespread use. A future improvement of the procedure will employ more rigorous methods, such as the weighted least...
2020
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
Geologic Interpretation of Gravity Anomalies of Northeastern Utah
James T. Smith, Kenneth L. Cook
Utah Geological Association
... was drafted from the computer-contoured map with some hand smoothing of the contours; also a 5-mgal contour interval was used for the Uinta Mountains area...
1985
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
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
Changes in soils and terrestrial landscapes of the Appalachian Basin (Conemaugh, Monongahela, and Dunkard groups), U.S.A., at the onset of the late Paleozoic climate transition
Daniel I. Hembree
Journal of Sedimentary Research (SEPM)
... on the observed data. A diffraction model was fitted to the measured pattern by nonlinear least-squares optimization. Modeling parameters include...
2024
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
Redox dynamics and metal cycling in the carbonate-buffered sediment–water interface of the ferruginous and sulfatic Lake Medard, Czech Republic
Daniel A. Petrash, Astolfo Valero, Karelys Umbría-Salinas, Christophe Thomazo, Travis B. Meador, František Laufek, James J. Valdés, Vladislav Chrastný, Kurt O. Konhauser
Journal of Sedimentary Research (SEPM)
... XRF maps (not shown). Spectra from samples were fitted with linear combinations of component spectra using a non linear least-squares algorithm...
2025
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
BIBLIOGRAPHY OF THESES AND DISSERTATIONS ON UTAH, BY ALL INSTITUTIONS, 1968 - 1979
Michael W. Hansen, Cheryl L. Kirk, William J. Byrd, Robin L. Dow, Joseph R. Lukas, Kathy A. Barrie
Rocky Mountain Association of Geologists
...), northcentral Utah: Univ. Utah, Salt Lake City, Utah, Masters thesis. Buttgereit, CD., 1968, A study of the least squares method of polynomial fitting: Univ...
1980
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
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
Statistical Time-Series Analysis and Sedimentological Tuning of Bedding Rhythms in a Triassic Basinal Succession (Southern Alps, Italy)
Florian Maurer, Linda Hinnov, Wolfgang Schlager
Special Publications of SEPM
.... 522-533. LOMB, N.R., 1976, Least squares frequency analysis of unequally spaced data: Astrophysics and Space Science, v. 39, p. 447-462. MAURER, F...
2004
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
Constraints on the nature and thickness of sedimentary fill and underlying basement rocks in Bowser and Sustut basins, north-central British Columbia from analysis of potential field data
Carmel Lowe, Judith Baker, Carol Evenchick
CSPG Bulletin
... are used to solve Euler's equation by a least squares inversion. The data window is then moved a specified number of elements in the x or y grid...
2006
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