 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.


 Made by Ice; Twice

   November 24, 2020

    EPOD.LakeChelan x2.2020

   Photographer:  Thomas McGuire
   Summary Authors:  Thomas McGuire

    Lake Chelan (shell ANN) on the eastern side of the  Cascade
   Mountains of Washington State is the  third deepest lake in the
   United States It is a mountain lake that extends from a surface
   elevation of 1,100 feet (335 m) above sea level to a depth 400 feet
   (122 m) below sea level. It is 50 miles (80 km )long and about a mile
   wide (1.6 km) with crystal clear water. Roads extend only about
   one-third of the way to the end where the isolated town of  Stehekin
   is located.

    Lake Chelan owes its origin to  glaciers that flowed into its
   mountain valley from two directions. From the west came an alpine arm
   of the  Cordilleran Ice Sheet that covered a large part of the
   mountains of Western North America. The lower end of the lake was
   created by an arm of  the same ice sheet that invaded from the
    Columbia River to the east creating the shallower western end of
   the lake. It is not known how many separate advances occurred from each
   direction.

   Autumn is apple picking time at numerous orchards along Lake Chelan, a
   region that also produces quality wines.

   The top image shows the steep mountains at mid-lake during smoke from
   fires in the West. The bottom image is  Wapato Point, in the eastern
   basin.
     * Lake Chelan, Washington Coordinates:  48.03343, -120.3717

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Geology Links

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     *  Mineral and Locality Database
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     *  This Dynamic Earth
     *  USGS
     *  USGS Ask a Geologist
     *  USGS/NPS Geologic Glossary
     *  USGS Volcano Hazards Program

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   Space Research Association.

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