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・ Red Sea (state)
・ Red Sea Afar Democratic Organisation
・ Red Sea Air
・ Red Sea bannerfish
・ Red Sea Cable
・ Red Sea cliff swallow
・ Red Sea clownfish
・ Red Sea Dam
・ Red Sea FC
・ Red Sea Flotilla
・ Red Sea Governorate
・ Red Sea Institute of Cinematic Arts
・ Red Sea Jazz Festival
・ Red Sea Mall
・ Red Sea Ports Authority
Red Sea Rift
・ Red Sea rig
・ Red Sea Riviera
・ Red Sea sailfin tang
・ Red Sea species hazardous to humans
・ Red Sea Trading Corporation
・ Red Sea University
・ Red sea urchin
・ Red Sea – Exodus station
・ Red seabream
・ Red Seal
・ Red seal ships
・ Red Seas Under Red Skies
・ Red Sea–Dead Sea Access
・ Red Sea–Dead Sea Canal


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Red Sea Rift : ウィキペディア英語版
Red Sea Rift
The Red Sea Rift is a spreading center between two tectonic plates, the African Plate and the Arabian Plate. It extends from the Dead Sea Transform fault system, and ends at an intersection with the Aden Ridge and the East African Rift, forming the Afar Triple Junction in the Afar Depression of the Horn of Africa.
The Red Sea Rift was formed by the divergence between the African Plate and the Arabian Plate. The rift transitioned from a continental rift to an oceanic rift.〔McGuire, AV, and RG Bohannon. “Timing of Mantle Upwelling: Evidence for a Passive Origin for the Red Sea Rift.” Journal of Geophysical Research: … 94.No. B2 (1989): 1677–1682.〕 Magnetic anomalies suggest that the spreading rate on either side of the Red Sea is about 1 cm/yr. The African plate has a rotation rate of 0.9270 degrees/Ma, while the Arabian plate has a rotation rate of 1.1616 degrees/Ma.〔McKenzie, DP, D Davies, and P Molnar. “Plate Tectonics of the Red Sea and East Africa.” Nature 226 (1970): 243–248.〕
== Spreading model ==
A two-stage spreading model explains the tectonic evolution in this region. The first major rift motion was seen in the lower/middle Eocene, followed by major seafloor spreading in the late Eocene and early Oligocene. This was followed by a period of 30 My of no motion, during which a large amount of evaporites were deposited. After this quiet period of deposition, a new period of activity started about five million years ago. This new phase of spreading caused considerable disturbance to the sediments that were deposited, which created an unstable situation as the crust and sediments parted and the axial trough evolved. Normal faulting along the rift valley during earthquakes shows that the extensional motion is continuing.〔Girdler, RW, and P Styles. “Two Stage Red Sea Floor Spreading.” Nature 247 (1974): 7–11.〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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