- isograd
- line connecting points of similar conditions during geological metamorphism
Phrontistery dictionary. 2013.
isograd
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isograd — isograd, isograde, isogradic see iso … Useful english dictionary
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
isograd — noun a line, either on a map or the surface of the Earth, joining points at which metamorphism reached similar pressures and temperatures; actually the intersection of a surface and that of the Earth … Wiktionary
isograde — isograd, isograde, isogradic see iso … Useful english dictionary
isogradic — isograd, isograde, isogradic see iso … Useful english dictionary
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
Canaveilles-Gruppe — Die Canaveilles Gruppe ist eine metasedimentäre Gesteinsfolge neoproterozoischen und kambrischen Alters, die in den Pyrenäen auftritt. Sie stellt die älteste Abfolge rein sedimentären Ursprungs in diesem Bereich dar. Inhaltsverzeichnis 1… … Deutsch Wikipedia
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