 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.


 Exogenic Fulgurites

   December 29, 2020

    Exogenic fulgurite

   Photographer:  Mila Zinkova
   Summary Author:  Mila Zinkova

   The class of  exogenic fulgurites refers to liquefied materials
   resulting from a powerful  lightning strike (>100 GW) that are
   thrown into the atmosphere above the lightning’s point of impact (i.e.
   they are ejected) and solidify in the air. Exogenic fulgurites feature
   an  amorphous and often bubbly appearance due to the rapid manner in
   which the airborne, liquefied materials cool down. They are generally
   dark green in color (as a result of a moderate  iron oxide content),
   differing from  traditional fulgurites, which are typically carrot,
   brown or tan. In addition, they have a smoother, glassier texture than
   conventional  fulgurites, which have a gritty, sandy feel to them.
   Photo taken November 12, 2020.

   Photo Details: Camera: Apple iPhone 6; Software: Adobe Photoshop CS3
   Windows; Exposure Time: 0.0009s (1/1163); Aperture: ƒ/2.2; ISO
   equivalent: 32; Focal Length (35mm): 35

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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

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

https://epod.usra.edu
 
