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The AAPG/Datapages Combined Publications Database
Showing 1,687 Results. Searched 201,049 documents.
A Conodont- and Graptolite-Based Silurian Chronostratigraphy
Mark A. Kleffner
Special Publications of SEPM
... of most or all of those best controlled points were subsequently used to calculate an equation for the LOC by the method of least squares...
1995
Secular Variations in the Phanerozoic Reef Ecosystem
Wolfgang Kiessling
Special Publications of SEPM
... on a least-squares of carbonate survival rates Mackenzie than older ones The reconstruction of ancient sediment masses fit The than older ones...
2002
Fault/Fracture Controlled Hydrothermal Dolomitization and Associated Diagenesis of the Upper Devonian Jean Marie Member (Redknife Formation) in the July Lake Area of Northeastern British Columbia
Jack Wendte, Ihsan Al-Aasm, Guoxiang Chi, David Sargent
CSPG Bulletin
... for calcite components. The least squares regression line and the corresponding correlation coefficient for all equant calcite cement components...
2009
Chapter 23: Crustal Structure and Geologic History of the Espino Rift, Venezuela, Based on Potential Fields, Seismic Reflection, and Well Data
Lourdes Rodriguez, Paul Mann, Stuart Hall
AAPG Special Volumes
... model used in this study combined the Pavlis et al. (2008) gravity compilation (i.e., EGM2008) developed in a least squares adjustment...
2021
Earthquake-Induced Landslides and Their Effects on Alluvial Fans
David K. Keefer
Journal of Sedimentary Research (SEPM)
... with equation is log-linear least-squares regression mean from Keefer and Wilson (1989). End_Page 85------------------------- debris flows. A smaller number...
1999
Petrologic evolution of the San Juan volcanic field, southwestern Colorado: Pb and Sr isotope evidence
Peter W. Lipman, Bruce R. Doe, Carl E. Hedge, Thomas A. Steven
Grand Junction Geological Society
.... America Bull., v. 55, p. 1047–1079. York, Derek, 1969, Least squares fitting of a straight line with correlated errors: Earth and Planetary Sci...
1978
Land, Marine and Transition Zone Seismic Operations in PPL 123, Papua New Guinea
Alan G. Fenwick, Robert J. Paul
Papua New Guinea (PNG) Petroleum Convention Proceedings
...° and greater than 150° introduce unacceptable error into the least squares trilateration solution. By necessity, numerous base stations needed...
1993
Orbital Climate Forcing in Mudflat to Marginal Lacustrine Deposits in the Miocene Teruel Basin (Northeast Spain)
Hemmo A. Abels, Hayfaa Abdul Aziz, Dario Ventra, Frederik J. Hilgen
Journal of Sedimentary Research (SEPM)
... Spain): Neues Jahrbuch fur Geologie und Palaontologie Monatshefte, v. 6, p. 327–360. Kirschvink, J.L., 1980, The least-squares line and plane...
2009
New U-Pb Zircon and 40AR/39AR Age Constraints on the Late Mesozoic to Cenozoic Plutonic Record in the Western San Juan Mountains
David A. Gonzales
Rocky Mountain Association of Geologists
... Society of America Bulletin, v. 108, no. 7, p. 757–767. York, D., 1969, Least squares fitting of a straight line with correlated errors: Earth...
2015
Magnetic-Fabric Analysis As A Tool To Constrain Mechanisms of Deep-Water Mudstone Deposition In the Marnoso Arenacea Formation (Miocene, Italy)
Eleonora Dall'olio, Fabrizio Felletti, Giovanni Muttoni
Journal of Sedimentary Research (SEPM)
... was then fit to the data by means of least-squares analysis, and errors were calculated using multivariate statistics (Jelinek 1978) with the software Anisoft...
2013
Spatial and stratigraphic variation of marine paleoenvironments in the upper Miocene Gatun Formation, Isthmus of Panama
Austin J.W. Hendy
PALAIOS
...) Scatter plot of 48 species with DCA 1 scores graphed against mean bathymetry. An ordinary least-squares algorithm was used to establish correlation...
2013
On the Stabilizing Influence of Silt on Sand Beds
Gerhard Bartzke, Karin R. Bryan, Conrad A. Pilditch, Katrin Huhn
Journal of Sedimentary Research (SEPM)
... in the water column, was modeled by the initial slope ab of the least-squares fit of the hyperbolic tangent model y = a tanh(bt) fitted to each 10...
2013
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
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