Results 21 to 30 of about 459,162 (303)

Upper Crustal Structure of Superfast‐Spread Oceanic Crust Exposed at the Pito Deep Rift: Implications for Seafloor Spreading

Geochemistry, Geophysics, Geosystems, 2023
A tectonic window into the upper 2,000 m of oceanic crust generated at the superfast spreading (∼142 mm/yr) southern East Pacific Rise exposes a continuous layered structure of basaltic lavas and sheeted dikes over gabbroic rocks.
J. A. Karson, L. A. Chutas, N. W. Hayman, R. N. Hey, A. J. Horst, S. D. Hurst, E. M. Klein, D. F. Naar, R. J. Varga   +8 more
doaj   +1 more source

Asymmetric seafloor depth across the Juan de Fuca Ridge caused by lithospheric heating

Communications Earth & Environment, 2023
Previous studies attribute asymmetries across the East Pacific Rise to horizontal temperature or pressure gradients in the deep asthenosphere caused by the Pacific Superswell, which, however, cannot explain asymmetries observed across the Juan de Fuca ...
Mengyu Wu, Michael H. Ritzwoller
doaj   +1 more source

Geophysical surveys on the East Pacific Rise -- Galapagos Rise system [PDF]

Geophysical Journal International, 1978
Summary. The East Pacific Rise at 12-15' S is topographically smooth with a crestal horst or linear volcanic peak marking the present axis of spreading. The Galapagos Rise at 14-17's is topographically rough with a possible central graben marking the extinct spreading axis.
R. N. Anderson, M. A. Hobart, R. P. Von Herzen, D. J. Fornari   +3 more
openaire   +1 more source

Structure of the southern Jalisco subduction zone, Mexico, as inferred from gravity and seismicity [PDF]

Geofísica Internacional, 1999
A type-model of the geological structure of the Jalisco subduction zone was determined by matching gravity anomalies observed along a profile perpendicular to the Jalisco coast near Barra de Navidad with the gravitational attraction of a geologic cross
M. Mena, A. Hurtado-Díaz, V. Kostoglodov, Bandy, W.   +3 more
doaj  

Determining gene flow and the influence of selection across the equatorial barrier of the East Pacific Rise in the tube-dwelling polychaete Alvinella pompejana

BMC Evolutionary Biology, 2010
Background Comparative phylogeography recently performed on the mitochondrial cytochrome oxidase I (mtCOI) gene from seven deep-sea vent species suggested that the East Pacific Rise fauna has undergone a vicariant event with the emergence of a north ...
Plouviez Sophie, Le Guen Dominique, Lecompte Odile, Lallier François H, Jollivet Didier   +4 more
doaj   +1 more source

How South Pacific mangroves may respond to predicted climate change and sea level rise [PDF]

, 2000
In the Pacific islands the total mangrove area is about 343,735 ha, with largest areas in Papua New Guinea, Solomon Islands, Fiji and New Caledonia. A total of 34 species of mangroves occur, as well as 3 hybrids. These are of the Indo-Malayan assemblage (
BF Clough, CD Woodroffe, CD Woodroffe, CD Woodroffe, CD Woodroffe, CD Woodroffe, CD Woodroffe, DA Scott, DA Scott, EJ Farnsworth, EJ Farnsworth, EJ Lahmann, EJ Lahmann, G Naidoo, JA Jimenez, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Ellison, JC Pernetta, JC Pernetta, JC Pernetta, L Sternberg, LD Lacerda, M Schwartz, MC Ball, MC Ball, MC Ball, MS Ross, N Idechong, NC Duke, P Bruun, P Saenger, PA Pirazzoli, PF Scholander, PFL Scholander, PR Bacon, RW Harrington, RW Parkinson, SC Snedaker, TR Alexander, TR Alexander, UNEP-IOC-WMO-IUCN, V Semeniuk, V Semeniuk, WL Stern   +56 more
core   +2 more sources

Gravity Anomalies and Implications for Shallow Mantle Processes of the Western Cocos‐Nazca Spreading Center

Geophysical Research Letters, 2023
This study analyzes up‐to‐date gravity data in the Galapagos triple junction region to understand crustal structure and melt distribution beneath the propagating Cocos‐Nazca spreading center (CNSC).
Tingting Zheng, Jian Lin, Hans Schouten, Deborah K. Smith, Emily Klein, Ross Parnell‐Turner   +5 more
doaj   +1 more source

“Plate‐like” subsidence of the East Pacific Rise–South Pacific superswell system [PDF]

Journal of Geophysical Research: Solid Earth, 2004
In previous studies the removal of small‐scale features such as seamounts and oceanic islands from bathymetry has revealed a large and unusually shallow region in the South Pacific Ocean, which, at 3000 km wide and up to 1 km high, has been dubbed a “superswell.” These studies use statistical techniques based on finding the modal depth of the ...
Hillier, J, Watts, A
openaire   +1 more source

Pacific basin interdependencies: A case for large-scale economic cooperation? [PDF]

, 2008
Japan's meteoric economic rise, the hardly less impressive growth of a number of newly industrialised countries in South-East Asia and the enormous mineral wealth of the region have long caused academic and political observers to show keen interest in ...
Lütkenhorst, Wilfried
core   +1 more source

Atmospheric torques and Earth's rotation: what drove the millisecond-level length-of-day response to the 2015–2016 El Niño? [PDF]

Earth System Dynamics, 2017
El Niño–Southern Oscillation (ENSO) events are classically associated with a significant increase in the length of day (LOD), with positive mountain torques arising from an east–west pressure dipole in the Pacific driving a rise of atmospheric angular
S. B. Lambert, S. L. Marcus, O. de Viron
doaj   +1 more source