- contact hornfels
- Золотодобыча: контактовые роговики
Универсальный англо-русский словарь. Академик.ру. 2011.
contact hornfels
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Hornfels — (German, meaning hornstone ) is the group designation for a series of contact metamorphic rocks that have been baked and indurated by the heat of intrusive igneous masses and have been rendered massive, hard, splintery, and in some cases… … Wikipedia
hornfels facies — ▪ rocks a major division of metamorphic rocks (rocks that form by contact metamorphism in the inner parts of the contact zone around igneous intrusions). All of the rocks called hornfels a hard, fine grained, flinty rock are created when… … Universalium
hornfels — /hawrn felz/, n. a dark, fine grained metamorphic rock, the result of recrystallization of siliceous or argillaceous sediments by contact metamorphism. [1850 55; < G, equiv. to Horn HORN + Fels rock, cliff] * * * … Universalium
hornfels — noun Any of a series of contact metamorphic rocks that have been baked and indurated by the heat of intrusive igneous masses and rendered massive, hard, splintery, and in some cases exceedingly tough and durable … Wiktionary
metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… … Universalium
Metamorphic rock — Metamorphic redirects here. For other uses, see Metamorphic (disambiguation). Quartzite, a form of metamorphic rock, from the Museum of Geology at University of Tartu collection. Metamorphic rock is the transformation of an existing rock type,… … Wikipedia
Metamorphic facies — Eclogite Blueschist Greenschist Prehnite Pumpellyite … Wikipedia
Metamorphism — For other uses, see Metamorphism (disambiguation). Schematic representation of a metamorphic reaction. Abbreviations of minerals: act = actinolite; chl = chlorite; ep = epidote; gt = garnet; hbl = hornblende; plag = plagioclase. Two minerals… … Wikipedia
Skarn — is a metamorphic rock that is usually variably colored green or red, occasionally grey, black, brown or white. It usually forms by chemical metasomatism of rocks during metamorphism and in the contact zone of magmatic intrusions like granites… … Wikipedia
Marine geology of the Cape Peninsula and False Bay — Contents 1 Introduction 2 The geological structure of the region 2.1 Malmesbury group deposition 2.1.1 Appearance of the exposed Malmesbury group rocks … Wikipedia
Geology of Tasmania — Tasmania has a varied geological history, with the world s biggest exposure of diabase, or dolerite. Rocks from the Neoproterozoic, Paleozoic and Mesozoic time periods appear. It is one of the few southern hemisphere areas glaciated during the… … Wikipedia
