Reposted by @atreegrowsincal.bsky.social

Team #gypsum all the way! At the 2019 Earth Educators' Rendezvous I was able to spend 8 hours underground at Mammoth Caves National Park to capture high-res (zoooomable) photospheres. Check out the amazing gypsum snowballs and flowers, grayed by torch smoke!
www.mrhollister.com/360/Mammoth%...