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

Pearl Necklace or Frozen Spiderweb? Fernlike Snow Crystal
Frost Crack in Linden Tree Triboluminescence Observed on Perito
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)

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

Dance Hall Rock and Tafoni La Scala dei Turchi Atacama
Lagoon and Sagittarius Arm of the Milky Way The Snake River’s
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)