 EPOD - a service of USRA

The Earth Science Picture of the Day (EPOD) highlights the diverse processes
and phenomena which shape our planet and our lives. EPOD will collect and
archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.


 Big Obsidian Flow

   October 21, 2020

    BigObsidian1

    BigObsidian3

   Photographer:  Peggy Riemer
   Summary Authors:  Peggy Riemer,  Stu Witmer

   The  Big Obsidian Flow in Oregon's  Newberry National Volcanic
   Monument dates back 1,300 years and is  Oregon's youngest volcanic
   flow. About 20 miles (32 km) southeast of Bend, Oregon,  Newberry is
   one of the largest  volcanoes in the Cascade Range, standing 3,600
   feet (1,097 m) above the landscape and encompassing an area of more
   than 500 square miles (1,300 sq km) with over 400  cinder cones.

   Research indicates intermittent  human activity here for more than
   10,000 years.  Obsidian, natural glass that's usually black and
   formed from quickly cooling lava, was regularly quarried and used to
   make stone tools and weapons. The  caldera was later named
    Newberry Crater in honor of  Dr. John Strong Newberry, the
   geologist who accompanied the  1885 Williamson-Abbott Expedition
   Pacific Railroad Survey.
     * Big Obsidian Flow, Oregon Coordinates:  43.69573, -121.23449

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    More...

Geology Links

     *  Earthquakes
     *  Geologic Time
     *  Geomagnetism
     *  General Dictionary of Geology
     *  Mineral and Locality Database
     *  Mohs Scale of Mineral Hardness
     *  This Dynamic Earth
     *  USGS
     *  USGS Ask a Geologist
     *  USGS/NPS Geologic Glossary
     *  USGS Volcano Hazards Program

-
   Earth Science Picture of the Day is a service of the  Universities
   Space Research Association.

https://epod.usra.edu
 
