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
Click on the PDF link for an Adobe Acrobat document with additional source information.

SOUTH DAKOTA SOURCE MAP | U.S. SOURCE MAPS INDEX


SOURCE NAME (CHEMICAL GROUP) OTHER NAME(S) PDF
Black Hills --
PDF

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Last Updated: 01/01/2017