South Dakota Obsidian Sources SOURCE NAME: Most commonly-used source name for the geochemical source OTHER NAMES: Alternate names or names of source outcrops belonging to same geochemical source group Click on active SOURCE NAME links below for additional available information Click HERE for South Dakota obsidian reference list SOURCE NAME (CHEMICAL GROUP) OTHER NAME(S) Black Hills -- Back to U. S. OBSIDIAN SOURCE CATALOG HOME PAGE Back to NORTHWEST RESEARCH OBSIDIAN STUDIES LABORATORY Last Updated: 02/26/2008