Results 161 to 170 of about 14,756 (198)
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Messinian salinity crisis regulated by competing tectonics and erosion at the Gibraltar arc
Nature, 2011The Messinian salinity crisis (5.96 to 5.33 million years ago) was caused by reduced water inflow from the Atlantic Ocean to the Mediterranean Sea resulting in widespread salt precipitation and a decrease in Mediterranean sea level of about 1.5 kilometres due to evaporation.
Daniel Garcia-Castellanos +1 more
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Geodynamics of the Gibraltar Arc and the Alboran Sea region
Journal of Geodynamics, 2014Located at the Westernmost tip of the Mediterranean sea, the Gibraltar Arc is a very complex zone. The Betics in Spain and the Rif belt in Morocco surround the Alboran sea characterized by a thinned continental crust. The geodynamic evolution of this region results from the convergence of African and Iberian margins since the Late Cretaceous.
Corsini, M. +2 more
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Mantle beneath the Gibraltar Arc from receiver functions
Geophysical Journal International, 2015P and S receiver functions (PRF and SRF) from 19 seismograph stations in the Gibraltar Arc and the Iberian Massif reveal new details of the regional deep structure. Within the high-velocity mantle body below southern Spain the 660-km discontinuity is depressed by at least 20 km.
Iolanda Morais +4 more
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Thermal structure of the crust in the Gibraltar Arc: Influence on active tectonics in the western Mediterranean [PDF]
Geochemistry, Geophysics, Geosystems, 2008 We have modeled thermal structure of the crust in the western Mediterranean on the basis of inversion of heat flow and elevation in the context of Airy's isostatic equilibrium. Modeling results reveal dramatic variations in crustal temperatures within the Gibraltar Arc region.
Juan I Soto +2 more
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Tectonophysics, 2016
Abstract We proposed a reconstruction of one of the tightest orogenic arcs on Earth: the Gibraltar Arc System. This reconstruction, which includes onshore and offshore data, is completed for approximately 9 Ma. The clues that lead us to draw it are based on a review in terms of structures and age of the superposed deformational events that took place
Ana Crespo-Blanc, Menchu Comas
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Abstract We proposed a reconstruction of one of the tightest orogenic arcs on Earth: the Gibraltar Arc System. This reconstruction, which includes onshore and offshore data, is completed for approximately 9 Ma. The clues that lead us to draw it are based on a review in terms of structures and age of the superposed deformational events that took place
Ana Crespo-Blanc, Menchu Comas
exaly +2 more sources
Palaeogeography and clay mineralogy of mid-Cretaceous flysches in the Gibraltar Arc area
Cretaceous Research, 1992Abstract A combined sedimentological and mineralogical study of several mid-Cretaceous sequences of the western Betic Cordillera and northern Rif has lead to the distinction of three main palaeogeographic areas. The basins of these areas received influxes of terrigenous sediments from different source areas.
A. López-Galindo, A. Martín-Algarra
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Paleomagnetic rotations and the kinematics of the Gibraltar arc
Geology, 1992Paleomagnetic investigations of a Mesozoic limestone sequence around the Gibraltar arc show that there have been large systematic rotations about a vertical axis and imply that there must have been a significant component of westward motion within the Betic-Rif orogenic belt.
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Structure and peridotite of Gibraltar arc southern bloc: gravimetric and aeromagnetic evidences
Arabian Journal of Geosciences, 2015The southern Gibraltar Arc’s bloc (Rif’s belt) has a complex geological setting including peridotites outcropping in the Rif and Betic. They are among the largest infracontinental mantle rock outcrops worldwide. In spite of several geological studies, the deep structure of this area remains poorly defined.
Najib Amar +6 more
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Journal of the Geological Society, 1998
We have investigated the kinematics of deformation in a sector of the Gibraltar arc in SW Spain, by synthesizing lineation data from major faults, the variation in structural trends, and palaeomagnetically determined vertical-axis rotations. The kinematic data show that transport directions throughout formation of the arc were consistently WNW ...
ANDREW I. KIRKER, JOHN P. PLATT
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We have investigated the kinematics of deformation in a sector of the Gibraltar arc in SW Spain, by synthesizing lineation data from major faults, the variation in structural trends, and palaeomagnetically determined vertical-axis rotations. The kinematic data show that transport directions throughout formation of the arc were consistently WNW ...
ANDREW I. KIRKER, JOHN P. PLATT
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Tectonic adaptation of the External Zones around the curved core of an orogen: the Gibraltar Arc
Journal of Structural Geology, 1990Abstract There is no real curvature in the External Zones of the Arc of Gibraltar. These External Zones are made up by the juxtaposition of segments with NNW-SSE- or E-W-trending structures. Juxtaposition does not result from late tectonics nor from a paleogeographic layout, but only from Miocene tectonics.
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