xenocryst
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xenocryst — xenocrystic, adj. /zen euh krist, zee neuh /, n. Mineral. a rock or crystal engulfed by magma and retained as an inclusion in the resulting igneous rock. [XENO + CRYST(AL)] * * * … Universalium
xenocryst — [ zɛnə(ʊ)krɪst] noun Geology a crystal in an igneous rock which is not derived from the original magma. Derivatives xenocrystic adjective Origin C19: from xeno + crystal … English new terms dictionary
xenocryst — xeno·cryst … English syllables
xenocryst — /ˈzɛnəkrɪst/ (say zenuhkrist) noun a crystal which becomes included in a magma as it rises and is not formed by the magma itself. {xeno + cryst(al)} …
xenocryst — … Useful english dictionary
Kimberlite — is a type of potassic volcanic rock best known for sometimes containing diamonds. It is named after the town of Kimberley in South Africa, where the discovery of an 83.5 carat diamond in 1871 spawned a diamond rush, eventually creating the Big… … Wikipedia
Geology of the Lassen volcanic area — The geology of the Lassen volcanic area presents a record of sedimentation and volcanic activity in the area in and around Lassen Volcanic National Park in Northern California, U.S.. The park is located in the southernmost part of the Cascade… … Wikipedia
Xenolith — This article concerns the geologic term, for other uses see: Xenolith (disambiguation) A xenolith (Greek: foreign rock ) is a rock fragment which becomes enveloped in a larger rock during the latter s development and hardening. In geology, the… … Wikipedia
Lamproite — Lamproites are ultrapotassic mantle derived volcanic rocks. They have low CaO, Al2O3, Na2O, high K2O/Al2O3, a relatively high MgO content and extreme enrichment in incompatible elements.Lamproites are geographically widespread yet are… … Wikipedia
Acasta — Der Acasta Gneis oder Acasta Gneis Komplex (nach dem nahe gelegenen Acasta River) ist eine Gesteinseinheit des Archaikums im Nordwesten Kanadas. Die überwiegend aus Gneis bestehende Einheit enthält Bereiche, deren Ausgangsgesteine auf ein Alter… … Deutsch Wikipedia
