- isograd rocks
- 等级岩
English-Chinese geology dictionary (英汉地质大词典). 2013.
isograd rocks
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Isograd — In geology, an isograd is a line in the field of constant metamorphic grade; it also separates zones of different metamorphic grades. On geologic maps focusing on metamorphic terrains (or landscapes underlain by metamorphic rocks), the boundaries … Wikipedia
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 zone — Schematic map of a terrane with an increasing metamorphic grade. There are two folded lithologies: quartzite (originally sandy sediment) and pelite (originally clayy sediment). The index minerals can only grow in the pelite. The highest indicated … Wikipedia
Granulite — Granulites are fine to medium–grained metamorphic rocks that have experienced high temperatures of metamorphism, composed mainly of feldspars sometimes associated with quartz and anhydrous ferromagnesian minerals, with granoblastic texture and… … Wikipedia
Talc carbonate — is a geologic term for a suite of rock and mineral compositions found in metamorphic ultramafic rocks.The term refers to the two most common end member minerals found within ultramafic rocks which have undergone talc carbonation or carbonation… … Wikipedia
Anthophyllite — Infobox mineral name = Anthophyllite category = boxwidth = boxbgcolor = caption = formula = Hydrous Magnesium Iron silicate (Mg,Fe)7Si8O22(OH)2 molweight = color = gray to green, brown, and beige habit = Rarely as distinct crystals. Commonly… … Wikipedia
