Upper Palaeozoic tectono-sedimentary evolution of the Arabian and adjoining plates

Article Abstract:

A study of rock structures in the Arabian plate was made to determine its history and kinematics. Evidences in the rock structures show widespread tectonic activity during the Devonian and up to the Carbonaceous period attributed to the collision of Gondwana and Laurussia. This was followed by glaciation of Gondwana as indicated by Silurian basal disconformity due to decreased sea levels. The last major occurrence was the Zagros rift extensional thrusting that caused continental break-up in what is now the Arabian Gulf.

Paleozoic Era, Arabian Peninsula

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Tectonic evolution of the northern Kenyan Rift

Article Abstract:

Half graben basins located in the northern Kenyan Rift indicate thinned areas of the earth's crust, resulting in seismic activities. Measurements and timing of volcanic and other sediments in the area indicate that the seismic activities as well as rifting occurrences had moved southward of the initial rift in the Lokichar Basin starting from the Pliocene Period. Such trends are indicative of small crust ruptures accompanied by tectonic movements.

Kenya, Pliocene Epoch

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Silurian turbidite provenance and the closure of Iapetus

Article Abstract:

Petrological samples greatly leaning towards a magmatic arc indicate that there was considerable volcanic activity in western Ireland during the Silurian period. The absence of significant metamorphism deformations in the structure of rock layers also point to minimal tectonic activity occuring at this period. Further evidences suggest that this lull took place at the time when oceanic subduction was replaced by continental collision.

Ireland, Silurian period

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