Michael Williams - Mt Shasta cinder cone - 2012

There were so many cindercone volcanoes around Flagstaff that it was a bit strange.

A rock picture and no lichen, moss, plants, or bugs?! I was a geology major in a past life and specimens like this have me dreaming of volcanology again. During the formation of the cinder cone KA Hill, the top layer of lava forming this rock cooled and hardened when exposed to air, producing cracks like drying mud. It looks like molten layers then flowed over and under that crust, breaking it apart and moving the pieces before cool air exposure again hardened the whole thing. Yay, geology! #geologyrocks #geology #arizona #lava #cindercone #volcano #volcanology #hikeaz67 #happierpodcast #gretchenrubin #lizcraft (at Arizona)

At the top of this 500 ft cinder cone was some wonderful view #oregon #cindercone #lavabutte #volcano #naturephotography #nature #hike (at Lava Butte) https://www.instagram.com/p/Ckmn5GrINNS/?igshid=NGJjMDIxMWI=

Yesterday I hiked up the Cinder Cone in @lassennps. It’s such a gnarly hike but very rewarding once you get to the top. #lassen #lassenpeak #cindercone #lassenvolcanicnationalpark #california #californiaphotography #sonyphotography #sonya6600 #photography (at Cinder Cone and the Fantastic Lava Beds) https://www.instagram.com/p/CerRM-YvKZo/?igshid=NGJjMDIxMWI=

Mono lake craters from ancient volcanoes that spewed ash and obsidian that are covering these slopes. #obsidian #volcanicglass #volcanicrock #volcaniceruption #cindercone #volcano #monolake (at Mono Lake-South Tufas) https://www.instagram.com/p/CdBsXTgvltA/?igshid=NGJjMDIxMWI=

Amboy Crater