Ethiopia-Yemen Continental Flood Basalts

Source: Wikipedia, the free encyclopedia.
Shibam-Kawkaban ignimbrite, Yemen, part of the Ethiopia-Yemen CFB

The Ethiopia-Yemen Continental Flood Basalts were erupted during the

Afar Plume and the initiation of rifting in the southern Red Sea and Gulf of Aden.[2]

In Ethiopia flood basalts cover an old erosion surface with occasional flat areas or peneplains.[3][4] Burial of old surfaces by lava has preserved laterite soils in both Yemen and Ethiopia.[4]

Composition

The lavas of the Ethiopia-Yemen CFB show systematic variations in composition both vertically and laterally. Most of the lavas are basalts, but those closest to the Afar Triangle being very

tholeiitic basalts and finally into low-Ti tholeiitic basalts. The sequence is also an example of bimodal volcanism and the uppermost part typically contains significant amounts of rhyolitic lavas.[2]

References

  1. doi:10.1016/S0012-821X(02)00525-3
    .
  2. ^
    doi:10.1016/j.epsl.2011.09.059
    .
  3. doi:10.1016/j.geomorph.2006.12.007
    .
  4. ^
    ISBN 978-94-017-8026-1
    .
Retrieved from "https://en.wikipedia.org/w/index.php?title=Ethiopia-Yemen_Continental_Flood_Basalts&oldid=1164442268"