🌋 Io: New image of a lake of fire, signs of permanent volcanism
—Ars Technica
「 By combining the imaging power of lots of smaller telescopes scattered across a plateau, ALMA is able to spot regional differences in the presence of specific elements in Io's atmosphere, as well as identify different isotopes of those elements 」
This stuff isn’t really basalt. I misspoke. Local geologic maps show the system as a dacite plug with associated extrusive deposits. That’s probably why the granitic xenoliths are stable. Mantle xenoliths like dunite would likely react with the magma. Mantle xenoliths are much more common in the Mojave, associated with the alkali basalts there #volcanism#geology
Saya sudah memindahkan beberapa catatan lepas tentang erupsi freatik ke blog saya https://dasaptaerwin.net/wp/.
Saya lakukan bukan karena bidang saya petrologi/vulkanologi, tapi karena ada peran hidrogeologi.
Silahkan mampir. #volcanism
No new model of the dike under Grindavík available today; it should be out tomorrow.
Eruption undersea SW of #Grindavík is now seen as less likely, as is an unusually large eruption. An eruption would most likely be in/near Grindavík at a similar scale to recent eruptions in the area.
Note that said "recent scale" still involves lava fountains ~50m tall, an #eruption lasting several months, and a couple tenths of a cubic kilometer of #lava
Fabrizio Fortuna gives us this striking view of ongoing volcanic activity in East Java, focusing on distant Mount Bromo, with another soma volcanic peak in the foreground and a crater between.
Cinnabar has a slight lead over quartz and I'm not happy about that! This is the start of a long thread for #TeamQuartz which I'll be updating throughout the day.
Quartz is my all time favourite mineral. Despite its simple formula (SiO2), it can be found in a variety of colours and morphologies 1/?
This large amethyst geode is on display in the National Museum of Scotland in Edinburgh. It formed 130 million years ago when there was intense volcanism in Brazil. Enough lava was produced to cover the British Isles in 3.2 km of lava flows. Amethyst then crystallised in cavities in the solidified lava