Subj : ES Picture of the Day 02  2022
To   : All
From : Dan Richter
Date : Sat Apr 02 2022 12:01:16

 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.


 Archive - Mud Cracks near Trona, California

   April 02, 2022

    https://epod.usra.edu/.a/6a0105371bb32c970b0148c690473a970c-pi

   Every weekend we present a notable item from our archives.

   This EPOD was originally published on December 13, 2010.

   Photographer:  Stan Celestian
   Summary Author:  Stan Celestian

    Mud cracks are  ephemeral  sedimentary features found not
   just in dry lands but also in a variety of locations and climates. The
   cracks featured above were found in a  desert wash near Trona,
   California. A rare rain event had flooded the area forming pools of
   sediment-laden water. As the sediment settled, the heavier
   coarse-grained particles collected on the bottom first, followed by
   finer and finer grained sediments. The last to accumulate was the
   finest  clay particles. After the pooled water evaporated, the
   sediments began to dry out. The surface clay contained the most water
   and shrank the most as it dried, resulting in the upward curl of the
   mud cracks. Note the coarser, deeper material between the cracks. Photo
   taken on October 12, 2010.

   Photo details: Camera Maker: NIKON CORPORATION; Camera Model: NIKON
   D200; Focal Length: 55mm (35mm equivalent: 82mm); Aperture: f/9.0;
   Exposure Time: 0.0031 s (1/320); ISO equiv: 100; Exposure Bias: none;
   Metering Mode: Center Weight; Exposure: program (Auto); White Balance:
   Manual; Light Source: Fine Weather; Flash Fired: No.
     * The Pinnacles near Trona, California Coordinates: 35.617134,
       -117.368360

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    Archive - Mud Cracks near Trona, California  Rainbow Pyrite
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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
     *  MyShake - University of California, Berkeley
     *  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
 
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