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O is for obsidian

January 1, 2011

Although a relative youngster in geologic terms, obsidian can change over time from glass to mineral.

Publication Year 2011
Title O is for obsidian
Authors W. H. Langer
Publication Type Article
Publication Subtype Journal Article
Series Title Aggregates Manager
Index ID 70003937
Record Source USGS Publications Warehouse
USGS Organization Central Mineral and Environmental Resources Science Center