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Col·legi Of. de Geòlegs d'Andorra Interessos científico- geològics i més...

14/12/2023

Quite the "morphed" geological Christmas tree

This is APOPHYLLITE on PREHNITE after LAUMONTITE

14/12/2023
Bon Nadal 😊🦖🦕🎄
14/12/2023

Bon Nadal 😊🦖🦕🎄

🎄🎄🎄🦖🦖🦖

14/12/2023
14/12/2023

La extinción de los dinosaurios, ¿crisis u oportunidad?

14/12/2023
10/12/2023
10/12/2023

This ice crystal cloud "rainbow" photo was taken in Ireland. 🌈 ☁️

photograhy by James Nasuta

10/12/2023

Ice Halos over Bavaria
Credit: Bastian Werner
Date: 2023 December
Location: Barvarian Alps, Germany

10/12/2023
10/12/2023

Los científicos descubren una gigantesca piscina de agua subterránea de seis millones de años en las profundidades de las montañas de Sicilia

10/12/2023

D**e cutting volcanics on the Canary Islands of Spain.

10/12/2023

So Beautiful❤️

07/12/2023

En el centro de la helada de Siberia se encuentra una maravilla mística llamada Baikal Zen. Aquí, en la superficie vítrea del lago Baikal, las piedras desafían la gravedad, equilibrándose sobre esbeltos pilares de hielo, que recuerdan a las serenas pilas de piedra de los jardines japoneses.

Estas rocas, aparentemente suspendidas en el aire sobre el agua, cuyo equilibrio es el resultado de el frío siberiano y los vientos del lago. Las piedras primero se fusionan con el hielo, una tarea que se logra fácilmente en el helado clima de Siberia. Luego , las ráfagas tallan el hielo en delicados pedestales, asegurando que las rocas alcancen su postura equilibrada.

Earth Unreal
imagen: Elena Vtorushina

07/12/2023

La caldera del volcán Kawah Ijen expulsa gases con azufre a 300ºC, que se mezclan con la laguna que habita en su cráter. Así, crea la ilusión de eruptar ríos de ‘lava’ azul.

🔗 Encuentra los detalles en el enlace del primer comentario

07/12/2023

This copper silicate hydroxide mineral with the chemical formula Cu5(SiO3)4(OH)2. is SHATTUCKITE.

Shattuckite is a relatively rare secondary mineral that forms in the oxidation zone of copper ore deposits, where copper rich solutions interact with surrounding rock formations.

Over a long period of time, these interactions lead to the formation of a beautiful mineral with its distinctive color * and unique crystal structure.

* Most often dark blue, light blue and turquoise

Shattuckite usually occurs as a granular massive or fibrous acicular crystals.

Shattuckite was first discovered in 1915 in the copper mines of Bisbee, Arizona, specifically the Shattuck Mine.

It is close to plancheite in structure and appearance.

From the Congo

07/12/2023

: Aunque algunos copos de nieve requieran un microscopio para verse, como el de esta fotografía, los más grandes pueden superar los 5 milímetros, siendo fácilmente observables a simple vista.

07/12/2023

La tierra narra historias esculpidas por el tiempo y las fuerzas de la naturaleza. Las maravillas geológicas en España no son meras formaciones, son reliquias vivas de una historia terrestre, capaces de cautivar a cualquier observador.

07/12/2023
07/12/2023

Espectacular fotografía de la Luna y Saturno❤️

07/12/2023
07/12/2023

Star Trails over Erupting Mt. Etna
Credit: Dario Giannobile
Date: 2023 November 30
Location: Mt. Etna, Sicily, Italy

07/12/2023
07/12/2023

L'Etna

📷Fernando Famiani

07/12/2023

🧩 Porcions d’amor 🩵 ~📍Andorra
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07/12/2023

American Mineralogist:
A dunite fragment in meteorite northwest Africa (NWA) 11421: A piece of the moon's mantle

https://doi.org/10.2138/am-2022-8911

Treiman and Semprich describe a centimeter-sized fragment of dunite, the first recognized fragment of Moon mantle material, in the lunar highlands breccia meteorite

Northwest Africa. From electron microscope data on dunite, they derive inferences about the bulk composition of the lunar mantle, processes related to the Lunar Magma Ocean and gravitational overturn of its cumulate rocks, and the present-day thermal structure of the Moon's mantle.

07/12/2023

This very sculptural piece of cobalt-bearing Aragonite looks like a purple tree in a valley of Calcite crystals. This "autumn landscape" is a nature’s piece of art, found in Baiyangping ore field, Lanping County, Nujiang, Yunnan, China. 8x7x6cm - photographed for the Mond Chang Collection.

07/12/2023

El monte ,en Sumatra Occidental, tuvo entró en erupción este domingo. La erupción estuvo marcada por una columna de ceniza que de elevó hasta 3km.

◾El nivel de actividad del Monte Marapi se encuentra en el Nivel II (Alerta).

Boletín del PVMBG

06/12/2023

A Dust Jet from the Surface of Comet 67P | Where do comet tails come from? There are no obvious places on the nuclei of comets from which the jets that create comet tails emanate. In 2016, though, ESA's Rosetta spacecraft not only imaged a jet emerging from Comet 67P/Churyumov-Gerasimenko, but flew right through it. Featured is a telling picture showing a bright plume emerging from a small circular dip bounded on one side by a 10-meter high wall. Analyses of Rosetta data show that the jet was composed of both dust and water-ice. The rugged but otherwise unremarkable terrain indicates that something likely happened far under the porous surface to create the plume. This image was taken about two months before Rosetta's mission ended with a controlled impact onto Comet 67P's surface. Image Credit: ESA, Rosetta, MPS, OSIRIS; UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA.

06/12/2023

Venus' nightside in the IR (false color for studying the atmosphere). This image was captured by the Japanese AKATSUKI spacecraft back in September 2016. On the nightside, the spacecraft observed infrared light coming from the lower atmosphere through clouds. The shadow of the clouds can also be seen in the image. Here, bright and dark are reversed to show clouds in whitish color. Very unusual and superb view of Venus. Credit image: PLANET-C Project Team

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