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The AAPG/Datapages Combined Publications Database

Showing 1,682 Results. Searched 200,636 documents.

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Ascending

Contrasting styles of reservoir development in proximal and distal chert facies: Devonian Thirtyone Formation, Texas

Stephen C. Ruppel, Roger J. Barnaby

AAPG Bulletin

... of neutron log porosity to core porosity. Comparison of a least squares regression, best fit to the data (solid line) and a 1:1 relationship between...

2001

Quantitative characterization of shales within tidally influenced fluvial valley fill deposits of the Ferron Sandstone, eastern Utah: Implications for hydrocarbon exploration

Kivanc Biber, Shuhab D. Khan, Janok P. Bhattacharya, Mark D. Barton, and Craig L. Glennie

AAPG Bulletin

... cloud data were merged using surveyed control points combined with a routine that uses least-squares to iteratively fit surfaces generated from...

2017

Validating novel boundary conditions for three-dimensional mechanics-based restoration: An extensional sandbox model example

Benjamin P. Chauvin, Peter J. Lovely, Joseph M. Stockmeyer, Andreas Plesch, Guillaume Caumon, and John H. Shaw

AAPG Bulletin

..., and J.-M. Morvan, 1997, A least-squares method for multisurface unfolding: Journal of Structural Geology, v. 19, no. 5, p. 735–743, doi...

2018

Geological evaluation of suprasalt carbon storage opportunities in the Silverpit Basin, United Kingdom Southern North Sea

A. D. Hollinsworth, I. de Jonge-Anderson, J. R. Underhill, and R. J. Jamieson

AAPG Bulletin

... (Figure 4). Least squares regression functions were fitted to P-wave velocity (VP) versus true vertical depth subsea (TVDSS) plots for each interval...

2022

The Hillabee metavolcanic complex and associated rock sequences: guidebook for the 17th annual field trip. Road Log.

James F. Tull, Stephen H. Stow

Alabama Geological Society

.... . Petrology, v 12, p. 1 -65. Petrology, v. .12, p. 1-65. Wright, T.L, an Doherty, P.C., 1970 A linear programming and least squares computer method...

1979

Substrate-Slope and Temperature Controls on Carbonate Ramps: Revelations from Upper Miocene Outcrops, Se Spain

Evan K. Franseen, Robert H. Goldstein, Mark R. Farr

Special Publications of SEPM

...- 341. KIRSCHVINK J L 1980 The least squares line and plane and the analysis of KJRSCHVINK, J. L., 1980, The least-squares line and plane...

1997

Geology, Petrology and Geochemistry of Submarine Volcanoes Around Epi Island, New Hebrides Island Arc

Anthony J. Crawford, H. Gary Greene, Neville F. Exon

Circum Pacific Council Publications

... then be tested using the Raleigh fractionation equation for trace elements. For all least-squares mixing tests, the GENMIX petrological mixing program (LeMaitre...

1988

Reservoir Compartmentalization of the Morrow Sandstone at Sorrento Field, Southeastern Colorado

Sandra McDonald Mark

Rocky Mountain Association of Geologists

... lithologies. The actual log data for each well were compared to local barriers to fluid flow. the typical lithology values by a least-squares-fit analysis...

1998

Integrated stratigraphic and geochemical analysis of organic-rich intervals of the Lewis Shale in the eastern Washakie Basin, Wyoming

Jane S. Hearon, Paul C. Hackley, Justin E. Birdwell

Rocky Mountain Association of Geologists

...) with default settings (sensitivity to pure components = 50, maximum alternating least squares iterations = 100). The full pyrograms were used, including the 51...

2025

Evidence of hydrothermal alteration in Devonian shales from the Eastern Gas Shales Project 2 core of the Rome trough, Appalachian Basin, United States

Kathryn L. Tamulonis, and Kristin M. Carter

Environmental Geosciences (DEG)

...s, to find agreement between observed patterns and the published crystal structure data of the minerals through least-squares analyses. Quantitie...

2021

Paleomagnetic Results from Alaska and Their Tectonic Implications

Robert S. Coe, Brian R. Globerman, Peter W. Plumley, Gordon A. Thrupp

Circum Pacific Council Publications

..., Geophysical Supplement, v. 7, p. 115-134. Kirschvink, J . L . , 1980, The least-squares line and plane and the analysis of paleomagnetic data: Geophysical...

1985

Testing the Daptocephalus and Lystrosaurus assemblage zones in a lithostratographic, magnetostratigraphic, and palynological framework in the Free State, South Africa

Robert A. Gastaldo, Johann Neveling, John W. Geissman, Cindy V. Looy

PALAIOS

... with special reference to the Western Karoo Basin: Annals of the Geological Survey, v. 12(1977–1978), p. 1–35. KIRSCHVINK, J.L., 1980, The least squares line...

2019

Controls On Sedimentation and Cyclicity of the Boquillas and Equivalent Eagle Ford Formation from Detailed Outcrop Studies of Western and Central Texas, U.S.A.

Daniel J. Lehrmann, Wan Yang, Zachary T. Sickmann, David A. Ferrill, Ronald N. McGinnis, Alan P. Morris, Kevin J. Smart, Kirk D.H. Gulliver

Journal of Sedimentary Research (SEPM)

... of cycles removed in each iteration of least-squares inversion (see Supplemental Material). The selected gammas (γ are marked with a vertical dashed...

2019

A chronostratigraphic framework for the Upper Jurassic Morrison Formation, western U.S.A.

Susannah C.R. Maidment, Adrian Muxworthy

Journal of Sedimentary Research (SEPM)

..., J.L., 1980, The least-squares line and plane and the analysis of paleomagnetic data: Geophysical Journal International, v. 62, p. 699– 718...

2019

Geological and 40Ar/39Ar geochronological constraints on the timing of quartz vein formation in Meguma Group lode-gold deposits, Nova Scotia

Daniel J. Kontak, Paul K. Smith, Peter Reynolds, Keith Taylor

Atlantic Geology

.... 169-194. YORK, D. 1969. Least squares fitting o f a straight line with correlated errors. Earth and Planetary Science Letters, 5, pp. 320-324...

1990

Constant size and mobility of grains in the Oligo-Miocene megafan deposits in the Swiss Molasse Basin despite long-term changes in tectonic processes, climatic conditions, and sediment flux

Philippos Garefalakis, Fritz Schlunegger, Ariel Henrique Do Prado, David Mair, Alexander C. Whittaker

Journal of Sedimentary Research (SEPM)

... least-squares regression analyses. This can be done, as the fraction in the substrate f can also be expressed as a function of ξ (Fedele and Paola...

2025

Fourier Grain-Shape Analysis of Coastal and Inner Continental-Shelf Sand Samples: Oceanside Littoral Cell, Southern Orange and San Diego Counties, Southern California

Robert H. Osborne, Chia-Chen Yeh

Special Publications of SEPM

... with periods equal to fundamental harmonics is fit to the observed data by a least squares tech Fourier method n is the har and 0n is the Rn is the harmonic...

1991

Regional Late Paleozoic Remagnetization of Shallow Water Carbonate Rocks in the Great Basin: The Usefulness of "Micro" - Fold Tests From Late Compaction Fabrics

Stephen L. Gillett, John W. Geissman

Special Publications of SEPM

... Geological 10 new of America Bulletin v 1982 298 303 p 1980 The least squares line and plane and the analysis of palaeomagnetic data Geophysical...

1993

Mineralogical and Geochemical Evidence for the Origin of Phosphorite Nodules on the Upper West Florida Slope

Kendall B. Fountain, Guerry H. McClellan

Special Publications of SEPM

... to a salllples deter~nine to precision of 0.005°28 or better in order to calculate the unit cell 0.005"20 a- and c- dimensions of francolite using least-squares...

2000

Deformational Style of the Wind River Uplift and Associated Flank Structures, Wyoming

James J. Willis, Richard H. Groshong Jr.

Wyoming Geological Association

... of the strain is done using the least-squares strain-gauge technique (Groshong, 1972). The accuracy of the strain magnitude is represented...

1993

Orbitally Driven Depositional Cyclicity in Shallow Marine Carbonates of the Lower Paleozoic Aisha-Bibi Seamount (Malyi Karatau, Kazakhstan): Integrated Sedimentological and Time-Series Study

Dmitry A. Bazykin, Linda A. Hinnov

Special Publications of SEPM

...-order bundling (on the order of 50 to 60 cycles; see Figure 10A), least-squares fitting of sinusoids was performed over f = [0., 0.005]. These best-fit...

2002

The U.S. Atlantic Continental Margin: Subsidence History, Crustal Structure and Thermal Evolution

A. B. Watts

AAPG Special Volumes

... is the sea-level change estimated by Watts and Steckler (1979) based on least squares fitting an exponential curve to the subsidence data from wells...

1981

Precise age and petrology of Silurian-Devonian plutons in the Benjamin River - Charlo area, northern New Brunswick

Jean-Luc Pilote, Sandra M. Barr, Reginald A. Wilson, Sean McClenaghan, Sandra Kamo, Vicki J. McNicoll, Mary Lou Bevier

Atlantic Geology

...://dx.doi.org/10.1016/0012-821X(79)90133-X York, D. 1969. Least squares fitting of a straight line with correlated errors. Earth and Planetary Science Letters, 5...

2012

Diagenetic Mineralogy and Controls on Albitization and Laumontite Formation in Paleogene Arkoses, Santa Ynez Mountains, California: Part 2. Aspects of Porosity Modification

Kenneth P. Helmold, Peter C. van de Kamp

AAPG Special Volumes

... Section, Society of Economic Paleontologists and Mineralogists, p. 46-54. Evans, Jr., H. T., D. E. Appleman, and D. S. Handwerker, 1963, The least...

1984

Quantitative Controls on Location and Architecture of Carbonate Depositional Sequences: Upper Miocene, Cabo De Gata Region, Se Spain

Evan K. Franseen , Robert H. Goldstein , Mark R. Farr

Journal of Sedimentary Research (SEPM)

... and relative changes in sea level: Marine Geology, v. 44, p. 181-212. KIRSCHVINK, J.L., 1980, The least-squares line and plane and the analysis...

1998

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