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Glassy silicic igneous rocks lacking a conchoidal fracture. A dark, resinous volcanic glass.
Classification of PitchstoneHide
Mineralogy of PitchstoneHide
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.|
References for PitchstoneHide
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Ballin, Torben Bjarke (2015). "Arran pitchstone (Scottish volcanic glass): New dating evidence". Journal of Lithic Studies. University of Edinburgh. 2 (1): 5–16. open access publication
C.H. Emeleus (1997). Geology of Rum and the adjacent islands : memoir for 1:50 000 geological sheet 60 (Scotland) (1. publ. ed.). London: Stationery Office.