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  2. Obsidian - Wikipedia

    en.wikipedia.org/wiki/Obsidian

    Obsidian scalpels older than 2100 BC have been found in a Bronze Age settlement in Turkey. [48] In the eastern Mediterranean area the material was used to make tools, mirrors and decorative objects. [49] The use of obsidian tools was present in Japan near areas of volcanic activity. [50] [51] Obsidian was mined during the Jōmon period.

  3. List of quarries in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_quarries_in_the...

    This is a list of notable quarries and areas of quarrying in the United States. A number of these are historic quarries listed on the National Register of Historic Places (NRHP), ranging from relatively ancient archeological sites to places having pre-World War II activity.

  4. Obsidian Cliff - Wikipedia

    en.wikipedia.org/wiki/Obsidian_Cliff

    Obsidian Cliff, also known as 48YE433, was an important source of lithic materials for prehistoric peoples in Yellowstone National Park near Mammoth Hot Springs, Wyoming, United States. The cliff was named by Philetus Norris , the second park superintendent in 1878. [ 5 ]

  5. Glass Buttes - Wikipedia

    en.wikipedia.org/wiki/Glass_Buttes

    The project also includes three exploratory wells on private land near Glass Buttes. An environmental assessment study was completed in 2013. Based on study, the Bureau of Land Management approved seven geothermal test wells. If the test wells find hot enough water, the company will use it to drive steam turbines to generate electricity. [34 ...

  6. Apache tears - Wikipedia

    en.wikipedia.org/wiki/Apache_tears

    Apache tears are rounded pebbles of obsidian or "obsidianites" composed of black or dark-colored natural volcanic glass, usually of rhyolitic composition and bearing conchoidal fracture. Also known by the lithologic term marekanite , this variety of obsidian occurs as subrounded to subangular bodies up to about 2 in (51 mm) in diameter, often ...

  7. Edziza obsidian - Wikipedia

    en.wikipedia.org/wiki/Edziza_obsidian

    Edziza obsidian is a naturally formed volcanic glass found at the Mount Edziza volcanic complex in northwestern British Columbia, Canada. It occurs in at least four geological formations of the volcanic complex and was widely used by indigenous peoples during the pre-Columbian era .

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  9. Trione-Annadel State Park - Wikipedia

    en.wikipedia.org/wiki/Trione-Annadel_State_Park

    The Southern Pomo and Southern Wappo peoples inhabited these lands in prehistoric times. No full-scale villages have been discovered within the park boundaries. This site was valuable to the Native American tribes as a source of obsidian, which they used to make scrapers, knives, arrowheads, and spearheads.