• ES Picture of the Day 03 2020

    From Black Panther@21:1/186 to All on Tue Nov 3 11:00:32 2020
    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.


    Snake Butte Laccolith

    November 03, 2020

    Snake Butte

    Photographer: Rod Benson
    Summary Authors: Rod Benson

    Snake Butte is a 2.6 mile (4.1 km) long laccolith located on
    the Fort Belknap Reservation in north-central Montana. The
    magma that became the butte originated from a volcanic
    center, which formed the Bears Paw Mountains several miles to the
    southwest. The Bears Paw Mountains, shown in the background, are
    remnants of volcanoes that were active some 50 million years ago.
    In the millions of years since the laccolith hardened, the less durable
    sedimentary rock above and around it eroded away, exposing the
    igneous rock of Snake Butte. The fence-like appearance of the
    cliffs shown in this aerial photo is due to columnar jointing,
    which occurred as the magma cooled.
    During the 1930s, the durable rock of Snake Butte was used to build the
    causeway at the Fort Peck Dam on the Missouri River in
    northeastern Montana. The quarry area can be seen along the right side
    of the butte in the photo. Snake Butte is interesting for several
    other reasons, including its significance as a sacred place for the
    tribes of the Fort Belknap Reservation, and the clues left there by the
    Laurentide Ice Sheet thousands of years ago. Photo taken August 17,
    2020.
    * Snake Butte, Montana Coordinates: 48.3736, -108.85655

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    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

    --- up 10 weeks, 21 hours, 20 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Thu Dec 3 11:00:46 2020
    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.


    Orion the Hunter and Mount Dirfis, Greece

    December 03, 2020

    Dirfis - Orion 2020-10-11

    Photographer: Dimitris Malliaris
    Summary Authors: Dimitris Malliaris; Jim Foster
    One of the more inspiring sights for stargazing enthusiasts is the
    rising of the constellation Orion the Hunter. The photo above
    features Orion as it’s rising above Mount Dirfis (5,719 ft or
    1,743 m), Greece. It was taken from the Agali's Canyon Refuge, at
    an altitude of 1,050 ft (930 m), on October 10, 2020. The pinkish
    blotch in the Sword of Orion, is the Great Orion Nebula
    ( M42), the brightest and most easily visible, diffuse nebula in
    the night sky.

    Photo Details: Sky - Pentax K-3 II camera; Pentax HD 16-85mm F3.5-5.6
    ED WR lens; 28mm focal length; ƒ/4 aperture; 90 second exposure time;
    ISO:800; Adobe Photoshop CC (Windows). Terrestrial - Pentax K-3 II
    camera; Pentax HD 16-85mm F3.5-5.6 ED WR lens; 28mm focal length; ƒ/4
    aperture, 30 second exposure time; ISO:2500; Adobe Photoshop CC
    (Windows).
    * Mount Dirfis, Greece Coordinates: 38.61276, 23.79963

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    Night Sky Links

    * Space Weather Live
    * Space Weather Live Forum
    * About the Moon
    * American Meteor Society
    * Arbeitskreises Meteore e.V.
    * Global City Lights
    * Heavens Above Home Page
    * The International Meteor Organization
    * Lunar and Planetary Institute
    * MoonConnection
    * NASA Eclipse Web Page
    * Understanding The Moon Phases

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

    https://epod.usra.edu

    --- up 14 weeks, 2 days, 21 hours, 20 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)