line connecting points of similar conditions during geological metamorphism

Phrontistery dictionary. 2013.

Look at other dictionaries:

  • 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

  • Saint-Jory-de-Chalais — Saint Jory de Chalais …   Deutsch Wikipedia

  • Saint-Paul-la-Roche — Saint Paul la Roche …   Deutsch Wikipedia

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