• ES Picture of the Day 25 2023

    From Black Panther@21:1/186 to All on Wed Jan 25 11:01:02 2023
    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.


    Pearl Necklace or Frozen Spiderweb?

    January 25, 2023


    20221211CavershamFrozen11
    Photographer: Chris Kotsiopoulos

    Summary Authors: Chris Kotsiopoulos; Jim Foster

    The frozen spiderweb above looks like it could be the design for a new
    pearl necklace. I noticed it after a night of thick fog and
    below-freezing temperatures where I live in Reading, England. By early
    morning the next day everything was transformed into a world of tiny
    ice crystals. I quickly retrieved my faithful Nikon D600 (DSLR)
    camera, put on a reverse lens for macro photography, and headed
    over to View Island, where I captured this photograph – I really
    like its simplicity.

    The necklace’s icy look is a result of rime ice ( hoar frost), which
    forms when the atmosphere is much colder than the surface,
    when water vapor is plentiful and when supersaturation of water
    molecules in the atmosphere is high. These criteria were met on this
    foggy morning. Click here to see more such photos – all were taken
    on December 11, 2022.


    Caversham, Reading, U.K. Coordinates: 51.4681022, -0.9738896


    Related EPODs

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    Moreno Glacier Snowflakes on Mount Etna Ice Crystal Formation
    on Frozen Soap Bubble
    More...

    Cryosphere Links

    * Guide to Frost
    * What is the Cryosphere?
    * Bentley Snow Crystals
    * Glaciers of the World
    * Ice, Snow, and Glaciers: The Water Cycle
    * The National Snow and Ice Data Center Google Earth Images
    * Snow and Ice Crystals

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

    https://epod.usra.edu

    --- up 47 weeks, 2 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Sat Feb 25 11:01:16 2023
    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.


    Dance Hall Rock and Tafoni

    February 24, 2023

    TomMc_EPOD.DancehallRockTom (004)

    TomMc_EPOD.TafoniWithinTafoniDanceHallRock2022 (003)

    Photographer: Thomas McGuire

    Summary Author: Thomas McGuire

    In 1879 a group of 236 Mormons answered the call to trek 200 miles
    (320 km) from their homes in southwestern Utah eastward across
    partially explored high desert to populate the San Juan River
    Valley. They had selected an unexplored “shortcut” to avoid an extra
    hundred miles of travel.

    This natural alcove (top photo), called Dance Hall Rock, provided a
    place for the travelers to rest and to re-purpose themselves as scouts
    looking for a way to access the Colorado River, more than 1,000
    feet (305 m) down a sheer cliff. They found a cleft in the rock where
    they had to chisel and dynamite an extremely steep and narrow ascent;
    so steep that both wagons and horses had to be lowered separately on
    ropes to the river below. After nearly a year of treacherous travel,
    they arrived two persons stronger than they left with no fatalities and
    two babies born along the journey.

    The alcove probably resulted from a layer of resistant, Jurassic
    aged Entrada sandstone, including many tafoni (bottom photo),
    overlying less resistant sandstone layers that over time had been
    hollowed out by wind and rain. Photos taken on May14, 2022


    Dance Hall Rock, Utah Coordinates: 37.357151, -111.100474


    Related EPODs

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    Formidable Hells Canyon Joggins Fossil Cliffs Salt Pans of
    Torre Nubia
    More...

    Geography Links

    * Atlapedia Online
    * CountryReports
    * GPS Visualizer
    * Holt Rinehart Winston World Atlas
    * Mapping Our World
    * Perry-Castañeda Library Map Collection
    * Types of Land
    * World Mapper

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

    https://epod.usra.edu

    --- up 51 weeks, 5 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)