#optical
Alkali Feldspar crystals are large in this thin section. The alkali feldspar have subhedral crystals. The quartzy matrix in some areas is intergrown at the edge of the alkali feldspar crystal faces. The muscovite crystallized in the interstitial space and have anhedral crystal faces. To differentiate between the muscovite and the biotite pleochroism comes into effect. The biotite is darker amber under PPL and muscovite is tan/light brown. Both are pleochroic under PPL.
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Websterite in thin section
Clinopyroxene and orthopyroxene with few anhedral plagioclase crystals in interstitial space. Opaques (oxides) also present.
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‘Triple Vision’ Image Of Jupiter Shows What’s Beneath Its Clouds
“Back in 2017, Hubble and Gemini North viewed Jupiter simultaneously. These multiwavelength views revealed the origin and properties of numerous phenomena. Dark infrared regions, including the Great Red Spot (and "Red Spot Jr.”), possess thick clouds. However, tiny infrared “dots” indicate downdrafts, creating convection and enabling Jovian lightning storms. Visible cloud breaks in Jupiter’s bands appear hot, allowing infrared emission through.“
Almost every image of Jupiter, our largest planet, comes to us as the result of observations made in visible light. That’s too bad, because by looking at Jupiter in multiple different wavelengths simultaneously, we can learn so much more than just from one, narrow band of viewing.
In case of jet-lag: knit ✅ rugs for the bedroom in marimekknit #marimekko #frekvenssi #machineknitting #dbj #img2track #knitstagram #homedecor #knitwear #blackandwhiteonly #optical
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“Glasses-hotties with accessories” - part 3
A really very cute guy in glasses showing us with his lovely nerdy smile his braces.
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