br00t4c, 21 days ago to earthquake

Massive volcanic caldera under southern Italy stirs ominously

#caldera #earthquake

https://nationalzero.com/2024/05/21/massive-volcanic-caldera-under-southern-italy-stirs-ominously/

Take_A_Bow, 30 days ago to NewZealand

#SilentSunday #newzealand #moon #caldera #Photography #Travel #Nature #Nomad #vanlife #rv

mashnotebeer, 8 months ago to Halloween

🎃 #Halloween #PumpkinBeer #CraftBeer #Beerrings 🍺 #shipyard #caldera 🧹 #shophandmade #beerstodon

https://mashnotebeercompany.etsy.com/listing/580570219

silicatefondue, 8 months ago to random

The Bandelier Tuff (New Mexico) ejected perhaps 800 cubic km of magma and rock in two events a little over 1 million years ago.

Trace elements in #quartz make it glow in an electron beam (cathode luminescence). The outer bright blue rims in CL record crystallization temperatures (from Ti concentrations) abruptly 100°C hotter than before: magma recharge triggering a #supereruption.

Jack Wilcock's M.Sc. work (John Stix's group).
#MinCup23 #Caldera #Volcano #NewMexico #LAICPMS #CL

Zoned quartz crystallized from silica-rich magma, now part of the Bandelier tuff. Color changes in cathode luminescence record trace element changes; here an increase in titanium concentrations in the rims. Titanium increases with crystallization temperature. Scale bar 0.5mm. From Wilcock et al. (2013) J. Petrology, doi:10.1093/petrology/egs078

SusiS, 10 months ago to FantasyWriters

Ist there life on Mars ?

#editing #landscape #volcaniclandscape #caldera #picodelteide

Anthro, 1 year ago to Geology

#Geology #Volcano #Pumice #Eruption #Rocks #Caldera

A variety of products collected from Medicine Lake Caldera and nearby mountains of volcanic glass.

Volcanic bomb broken to show vesicular interior and flowing/shaping of magma in flight.

Black obsidian showing gas vesicles layered along edge.

Gray pumice with styrofoam texture inter layered with gray bands of obsidian…showing deformation during placement.

Collected during high-precision survey measurement of caldera subsidence in 1987.

Highly vesicular black obsidian
Unbroken pumice flow sample, with bands of gray obsidian showing deformation before cooling