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Ophiolites are sequences of mafic to ultramafic rock generally believed to represent ancient oceanic lithosphere.They are distributed all across the world being all of them located at present or past orogenic belts, sites of mountain building processes.
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. The Greek word ὄφις, ophis (snake) is found in the name of ophiolites, because of the superficial texture of some of them. Serpentinite especially evokes a snakeskin.
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 ...
The Dun Mountain Ophiolite is an ophiolite of Permian age located in New Zealand's South Island. Prehistorically this ophiolite was quarried by Māori for both metasomatized argillite and pounamu which was used in the production of tools and jewellery. [2] In the late 1800s, the Dun Mountain ophiolite belt was surveyed for its economic potential.
The ophiolite is intruded by a sill of granitic rock, the Payson Granite, which conceals the deepest layers of the ophiolite, including the entire ultramafic mantle portion of the ophiolite. The deepest accessible layers are the gabbronorite of Round Valley. [2] Regionally, the ophiolite is thought to be overlain by the Tonto Basin Supergroup. [3]
The Zambales Ophiolite Complex (also called Zambales Ophiolite) is a large, well-preserved exposure of oceanic crust located in the western portion of Luzon Island, Philippines. [1] It is considered one of the best-preserved and most studied ophiolites , offering valuable insights into the formation and evolution of oceanic crust and the ...
Download as PDF; Printable version ... The Morais ophiolite ... J.R. and Cuesta, L.A., 2000 - Geochronological and geochemical constraints on the origin of the ...
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