The diversity and complexity of existing models on the structure Red Sea is result a mobile sedimentary cover that not only hides most basement oceanic structures but also hamper geophysical signals. In this study, we combined published with new unpublished data to propose revised interpretation lithosphere between Hanish Islands (ca. 13.5°N) Dead Fracture Zone 27.5°N). recognition allochthonou...

Large-offset oceanic detachment faults are a characteristic of slow- and ultraslow-spreading ridges, leading to the formation of oceanic core complexes (OCCs) that expose upper mantle and lower crustal rocks on the seafloor. The lithospheric extension accommodated by these structures is now recognized as a fundamentally distinct "detachment-mode" of seafloor spreading compared to classical magm...

The Scotia Sea in the South Atlantic holds a prominent position in geodynamics, because it has been proposed as a potential outlet of asthenosphere from under the shrinking Pacific into the mantle beneath the opening Atlantic. Shear wave splitting and geochemical studies have previously tested this hypothesis. Here, we take a different approach by calculating presentday dynamic topography of th...

The capacity of oceanic crust to record geomagnetic polarity reversals makes sea-surface magnetic anomalies an essential tool study plate tectonics. are usually well-defined at magmatic spreading centers, but distorted and eventually disappear on magma-poor mid-ocean ridges such as the ultraslow Southwest Indian Ridge (SWIR), making their interpretation difficult. We attribute variability SWIR ...

It is well recognized that most marine vertebrates, and especially tetrapods, precisely orient and actively move in apparently homogeneous oceanic environments. Here, we investigate the presumptive role of oceanic currents in biogeographic patterns observed in a secondarily marine tetrapod, the yellow-bellied sea snake (Hydrophis [Pelamis] platurus). State-of-the-art world ocean circulation mod...

The boundary between the African and Arabian plates in the Southern Red Sea region is displaced inland in the northern Afar rift, where it is marked by the Red Sea-parallel Erta Ale, Alaita, and Tat Ali volcanic ridges. The Erta Ale is offset by about 20 and 40 km from the two en echelon ridges to the south. The offset area is highly seismic and marked by a depression filled by lake Afrera, a s...

Analysis of the transition from the NE Yermak Plateau into the oceanic Eurasian Basin sheds light on the Paleocene formation of this Arctic basin. Newly acquired multichannel seismic data with a 3600m long streamer shot during ice-free conditions enables the interpretation of crustal structures. Evidence is provided that no major compressional deformation affected the NE Yermak Plateau. The sei...

A new 3D S-velocity model for the crust and upper mantle beneath Yellow Sea, East China Japan Philippine Sea is determined by means of Rayleigh-wave analysis depths ranging from 0 to 400 km, most conspicuous features earth structure in this region are revealed model. In depth range 5 30 principally affected thickness crust. areas with thin (oceanic crust), highest values determined, while lower...

The Red Sea formed as a consequence of Cenozoic rifting between the African and Arabian plates. While continuous oceanic spreading is active in southern central sectors, northern Sea, exposure crust limited to few along-axis isolated deeps. However, several off-axis magmatic edifices have been recognized this sector, their description terms relative age architectural features remains vague. One...