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A compact, vesicular or slaggy metamorphic rock of any composition with a glass content ranging from a few percent up to a maximum of 20% vol., and either produced by contact metamorphism in volcanic to subvolcanic settings or generated by combustion metamorphism.
Classification of Fritted-rockHide
Sub-divisions of Fritted-rockHide
Mineralogy of Fritted-rockHide
Essential minerals - these are minerals that are required within the classification of this rock:
|Glass||An amorphous, homogeneous material with a random liquid-like structure generally formed due to rapid cooling.|
Non-essential minerals - these minerals are common, sometimes major components, but are not always present: