Results 81 to 90 of about 12,007 (231)

Magnetic properties of the Old Crow tephra: Identification of a complex iron titanium oxide mineralogy

, 2004
International audience[1] The mineralogy and grain-size distribution of the Fe-Ti oxide population of the Old Crow tephra bed, outcropping at the Halfway House loess deposit in central Alaska, are characterized through multiple low-and high-temperature ...
Ade-Hall, Arai, Arai, Begét, Begét, Begét, Berger, Brown, Day, Fournelle, France Lagroix, Froese, Frost, Grommé, Hamilton, Hoffman, Hunt, Ishikawa, Ishikawa, Jackson, Kakol, Kakol, Lagroix, McEnroe, Mike J. Jackson, Miller, Moskowitz, Moskowitz, Mullins, Nagata, Nord, Néel, Oches, Plafker, Preece, Radhakrishnamurthy, Rancourt, Shirane, Subir K. Banerjee, Westgate, Westgate, Westgate, Worm, Özdemir   +43 more
core   +3 more sources

Paleomagnetism of the Devonian Onondaga Limestone Revisited [PDF]

, 1979
Ninety-six oriented samples were collected from 13 sites in the Onondaga limestone of New York for paleomagnetic study, including rock magnetism and magnetic susceptibility anisotropy.
Bathurst, Claesson, Cox, Creer, Dennis V. Kent, Dunlop, Dunlop, Fisher, Graham, Graham, Graham, Granar, Hamilton, Heller, Irving, Johnson, Kent, Kent, King, Lowrie, Løvlie, Martin, McElhinny, McElhinny, Molyneux, Oliver, Readman, Rodgers, Schuchert, Van der Voo, Van der Voo, Woodward, Zijderveld   +32 more
core   +2 more sources

The Electrical Conductivity of the Lower Mantle From High‐Pressure/High‐Temperature Measurements of Pyrolite and Ten Years of Geomagnetic Observations

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Electromagnetic sounding coupled with experimental measurements of electrical conductivity (EC) can provide valuable constraints on the thermochemical state of Earth's lower mantle. Here, we report a new set of experimentally determined EC values of pyrolite, a candidate composition of the lower mantle, between 25 and 80 GPa at room ...
Charlotte Trubowitz, Motohiko Murakami, Federico Munch, Alexander Grayver, Christian Liebske, Amir Khan, Nobuyoshi Miyajima, Pinku Saha, Yoshiyuki Okuda, Georg Spiekermann, Luiz Grafulha Morales   +10 more
wiley   +1 more source

The Birth of Paleomagnetism in Latin America: Argentina [PDF]

, 2013
Paleomagnetic activities in Latin America started with the first field trip of the young Ken Creer in 1957. In the early sixties, and by initiative of the by then Director of the Department of Geological Sciences at the University of Buenos Aires, Feliz ...
Vilas, Juan Francisco A.
core  

Revisiting the Jurassic Geomagnetic Reversal recorded in the Lesotho Basalt (Southern Africa)

, 2003
We carried out a detailed and continuous paleomagnetic sampling of the reversed to normal geomagnetic transition recorded by some 60 consecutive flow units near the base of the Lesotho Basalt (183  1 Ma).
Camps, Cox, Hoffman, John Thompson, Laj, Liliane Faynot, Michel Prévot, Mireille Perrin, Morgan, Neil Roberts, Pierre Camps, Prévot, Prévot   +12 more
core   +2 more sources

Early Jurassic magnetostratigraphy and paleolatitudes from the Hartford continental rift basin (eastern North America) . . . [PDF]

, 2008
To determine whether the ~200 Ma central Atlantic magmatic province (CAMP) coincides with a normal polarity bias and a purported abrupt change in polar wander at the J1 cusp, we collected samples for paleomagnetic study from 80 sites distributed over a ...
Kent, Dennis V., Olsen, Paul E.
core   +2 more sources

Variable Oceanic Crust Accretion at a Slow‐Spreading Ridge: A Vp/Vs Ratio Evidence Across the Southwest Sub‐Basin of the South China Sea

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract The opening of the Southwest Sub‐basin (SWSB) of the South China Sea was slow‐spreading and has been propagated toward the southwest. Yet, the structural variability and magmatic accretion process of the SWSB are still enigmatic. Here, utilizing a wide‐angle seismic profile traversing the central segment of the SWSB, we obtain detailed S‐wave ...
Ye Yuan, Yuhan Li, Yongjian Yao, Minghui Zhao, Jiazheng Zhang, Enyuan He, Lianjun Li   +6 more
wiley   +1 more source

Paleomagnetism of the Carboniferous-Permian Patquia Formation, Paganzo basin, Argentina: implications for the apparent polar wander path for South America and Gondwana during the Late Palaeozoic [PDF]

, 2010
The magnetic properties of the Carboniferous-Permian red beds of the Patquía Formation at Punta del Viento, Sierra de Umango and some previously reported localities, all in the Paganzo Basin (Argentina), have been studied.
Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina), Escosteguy, L.D., Geuna, S.E., Limarino, C.O.   +3 more
core   +3 more sources

Kinematics of Burial Remagnetizations in Fold‐and‐Thrust Belts: A Case Study From the South Pyrenean Foreland Basin (NE Spain)

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract This study investigates two burial‐related remagnetizations in the Jaca–Pamplona foreland basin (Southern Pyrenees): one with dual polarity and a positive reversals test, and another with only reverse polarity. These components, labeled C3 and C4 based on their mean unblocking temperatures, were identified from a paleomagnetic analysis of 142 ...
P. Calvín, E. Izquierdo‐Llavall, P. Sierra‐Campos, E. Beamud, M. J. Dekkers, R. Egli, A. Rodríguez‐Pintó, J. C. Larrasoaña, E. L. Pueyo   +8 more
wiley   +1 more source

High Geomagnetic Reversal Frequency During the Middle to Late Ediacaran (∼570 Ma) Constrained by Integrated Magneto‐ and Cyclostratigraphy

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract The Ediacaran–Cambrian (∼635–539 Ma) geomagnetic field is characterized by unusually high reversal rates and markedly weakened field strength. Estimates of these reversal frequencies can reveal key aspects of deep Earth dynamics and their potential influence on surface environments and early complex life.
J. W. L. Afonso, R. M. Rocha, D. R. Franco, N. B. Dos Santos, C. G. Leandro, P. Franceschinis, A. E. Rapalini, M. J. Arrouy, L. E. Gómez‐Peral, D. G. Poiré, S. Caetano‐Filho, H. D. Brito, R. I. F. Trindade   +12 more
wiley   +1 more source