Modena and Panaca Summit obsidian

Modena (Iron County, Utah) and Panaca Summit (Lincoln County, Nevada) are listed together because their obsidian nodules lie along one belt more than 20 miles long between Panaca, Nevada, and Modena, Utah. At Panaca Summit the nodules occur as float and in perlite deposits, and the Blue Ridge perlite deposit is a known source of Apache tears, the small rounded obsidian nodules sold to rockhounds. Utah's Modena source ranks fourth among Utah sources in the Northwest Research Obsidian Studies Laboratory's database of more than 8,000 characterized artifacts. The Nevada Department of Transportation found Fremont-area sites near Modena using it, and artifacts at the Panaca Summit site complexes match Utah sources. Quality and look are not described in the opened sources.

Obsidian nodules in perlite and as surface float over a belt of more than 20 miles between Panaca, Nevada, and Modena, Utah. The Blue Ridge perlite deposit (T.2S., R.70E., section 2) yields Apache tears.