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The Samail Ophiolite, also known as the Semail Ophiolite, is a large, ancient geological formation in Oman and the United Arab Emirates in the Arabian Peninsula. [2] It is one of the world's largest and best-exposed segments of oceanic crust , made of volcanic rocks and ultramafic rocks from the Earth's upper mantle that was overthrust onto the ...
Ordovician ophiolite in Gros Morne National Park, Newfoundland Chromitic serpentinite, Bay of Islands Ophiolite, Lewis Hills, Newfoundland. An ophiolite is a section of Earth's oceanic crust and the underlying upper mantle that has been uplifted and exposed, and often emplaced onto continental crustal rocks.
This obducted sequence of ultramafic to mafic rocks is the Semail Ophiolite complex. The ophiolite is locally rich in copper and chromite orebodies. [1] [2] Seismic reflection profiles consisting of magnetic and gravitational data, provide models for the subsurface of the northwestern Oman and northeastern UAE onshore/offshore topography.
Bay of Islands Ophiolite in Gros Morne National Park, Newfoundland, named a UNESCO World Heritage Site in 1987 because of its superbly exposed complete ophiolite stratigraphic sequence [7] Thetford Mines ophiolite Complex (Thetford Mines, Cantons de l'Est, Québec, Canada) [8] [9] Asbestos ophiolite (Asbestos, Cantons de l'Est, Québec, Canada) [9]
Maydan Syncline, Oman, part of the Semail Ophiolite - A sheeted dyke complex on the coast of Oman has been discovered to have been formed during a single sea-floor spreading episode. [ 9 ] [ 10 ] Hole 504b, Costa Rica - Hole 504b is a scientific ocean drilling program that burrowed 1562.3 m below the seafloor directly through layers of sediment ...
With the formation of the supercontinent Pangea, the area became more arid in the Permian into the Triassic.Shallow water carbonates and evaporites belonging to the Khuff Formation deposited during a marine transgression, with microcrystalline dolomite, limestone and anhydrite up to 2.9 kilometres (1.8 miles) thick and recording five marine regressions.
This is a prominent linear structure, trending NNE—SSW. However, it is still debated as to what this structure is. Different geologists claim that it is a left-lateral (sinistral) strike-slip fault , [ 28 ] a normal fault , [ 22 ] a lateral ramp, [ 29 ] a monocline due to a blind thrust , [ 16 ] or a fault with multiple phases of deformation.
The Troodos Ophiolite on the island of Cyprus represents a Late Cretaceous spreading axis (mid-ocean ridge) that has since been uplifted due to its positioning on the overriding Anatolian Plate at the Cyprus arc and ongoing subduction to the south of the Eratosthenes Seamount.