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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.
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.
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 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 ...
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 exact origins of the rocks found in the ophiolite are a matter of debate; some geologists hypothesize that the rock primarily consists of mid-ocean lithosphere, while others assert different ideas related to island arc terranes associated with the Nevadan orogeny. [4]
The Lizard complex, Cornwall is generally accepted to represent a preserved example of an exposed ophiolite complex in the United Kingdom. The rocks found in The Lizard area are analogous to those found in such famous areas as the Troodos Mountains, Cyprus and the Semail Ophiolite, Oman.
Our bodies have 3 billion genetic building blocks, or base pairs, that make us who we are. And of those 3 billion base pairs, only a tiny amount are unique to us, making us about 99.9% genetically ...