UNITED STATES AND CANADA OBSIDIAN SOURCE CATALOG
South Dakota Obsidian Sources
Six cm-long fresh flake of Black Hills obsidian. The phenocryst-rich black glass and slightly hackly fracture are typical for glass from this small source.
SOURCE NAME: Most commonly-used name for the geochemical source
OTHER NAMES: Alternate names or names of source outcrops belonging to same geochemical source group
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SOUTH DAKOTA SOURCE MAP |
U.S. SOURCE MAPS INDEX
|SOURCE NAME (CHEMICAL GROUP)
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Last Updated: 11/01/2020