20 de outubro de 2015

Strata at Base of Mount Sharp



A view from the "Kimberley" formation on Mars taken by NASA's Curiosity rover. The strata in the foreground dip towards the base of Mount Sharp, indicating flow of water toward a basin that existed before the larger bulk of the mountain formed.

The colors are adjusted so that rocks look approximately as they would if they were on Earth, to help geologists interpret the rocks. This "white balancing" to adjust for the lighting on Mars overly compensates for the absence of blue on Mars, making the sky appear light blue and sometimes giving dark, black rocks a blue cast.

This image was taken by the Mast Camera (Mastcam) on Curiosity on the 580th Martian day, or sol, of the mission.

Malin Space Science Systems, San Diego, built and operates Curiosity's Mastcam. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology, Pasadena, built the rover and manages the project for NASA's Science Mission Directorate, Washington. 

Image Credit: NASA/JPL-Caltech 

18 de janeiro de 2012

9 de abril de 2008

Minerais fluorescentes (UV) / Fluorescent minerals under UV

Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a form of luminescence. In most cases, emitted light has a longer wavelength, and therefore lower energy, than the absorbed radiation. However, when the absorbed electromagnetic radiation is intense, it is possible for one electron to absorb two photons; this two-photon absorption can lead to emission of radiation having a shorter wavelength than the absorbed radiation. The emitted radiation may also be of the same wavelength as the absorbed radiation, termed "resonance fluorescence". (by Wikipedia)


Cobaltocalcite  (Click in: http://www.mindat.org/min-1094.html)





17 de novembro de 2007

Colecção Minerais/Fósseis



Calymene



Artículo em estrela de Crinóide


Meteorito Metálico



Fetos fossilizados



Peixe Fossilizado



















Olho-de-Tigre (view in: http://www.mindat.org/min-3960.html)






Tórax de Calymene





Roselite + cobaltaustinite (view in: http://www.mindat.org/min-3450.html and http://www.mindat.org/min-1099.html )









Cobaltocalcite (view in: http://www.mindat.org/min-1094.html)














Fluorite verde (view in: http://www.mindat.org/min-1576.html)






Colecção de Trilobites


 

Calymenes







Opala negra (view in: http://www.mindat.org/min-7998.html)




Ostra fossilizada



Rosa-do-deserto







Trilobites (Leonaspis e cephaspis)



Meteoritos, tectites e fulgoritos




Minerais caixa 1




Minerais caixa 2




Minerais caixa 3










Granadas vermelhas (view in: http://www.mindat.org/min-1651.html)






Labradorite (view in: http://www.mindat.org/min-2308.html)



Distena/ Kyanite (view in: http://www.mindat.org/min-2303.html)



Disco de pedunculo de crinóide (Sagres-Algarve



Espato-da-Islândia e calcite



Fluorite rosa (view in: http://www.mindat.org/min-1576.html)



Fluorite amarela (view in: http://www.mindat.org/min-1576.html)




Cobaltocalcite (view in: http://www.mindat.org/min-1094.html)






Cobre nativo (view in: http://www.mindat.org/min-1209.html)




Amonite







Ametista com Calcite




Amonite






Alexandrite (view in: http://www.mindat.org/min-109.html)



Calcantite (view in: http://www.mindat.org/min-959.html)