- plutons
- 'pluËtÉ‘n /-tÉ’n n. type of volcanic rock formed deep below the surface of the Earth (Geology)
English contemporary dictionary. 2014.
plutons
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Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… … Wikipedia
Pluton (géologie) — Pour les articles homonymes, voir Pluton. En géologie, le terme de pluton[1] désigne un massif cristallin formé de roches plutoniques[2]. Les plutons sont le devenir des magmas lorsqu ils sont piégés en profondeur dans la croûte par opposition… … Wikipédia en Français
Methods of pluton emplacement — are not yet fully understood, but there are many different proposed pluton emplacement mechanisms. Stoping, diapirism and ballooning are the widely accepted mechanisms. There is now evidence of incremental emplacement of plutons. This means that… … Wikipedia
Cornubian batholith — Map showing the main granite outcrops of the Cornubian batholith in southwest England and the location of Haig Fras the 20 mGal Bouguer anomaly is also shown as this indicates the location of the negative anomalies associated with these… … Wikipedia
Anorthosite — (pronEng|æˈnɔrθəsaɪt/, /ə ) is a phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar (90–100%), and a minimal mafic component (0–10%). Pyroxene, ilmenite, magnetite, and olivine are the mafic minerals most… … Wikipedia
Batholith — A batholith (from Greek bathos , depth + lithos , rock) is a large emplacement of igneous intrusive (also called plutonic) rock that forms from cooled magma deep in the Earth s crust. Batholiths are almost always made mostly of felsic or… … Wikipedia
Kaapvaal craton — The Kaapvaal craton (Limpopo province of South Africa), along with the Pilbara craton of Western Australia, are the only remaining areas of pristine 3.6 2.5 Ga crust on Earth. Similarities of rock records from both these cratons, especially of… … Wikipedia
Slave craton — which is one of the oldest dated rock units on Earth at 4.03 Ga. The crust of the Slave craton is thought to have amalgamated during a 2.69 Ga collision between a proto Slave western basement complex, known as the Central Slave Basement Complex,… … Wikipedia
Spéléologie — Spéléologues dans une belle cavité … Wikipédia en Français
Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… … Universalium
