How does columnar basalt form ? Tabletop demonstration, using coconut oil and involving Voronoi diagrams - and full explanation at ▻https://www.reddit.com/r/askscience/comments/3i1vd0/this_coconut_oil_melted_during_a_heat_wave_and/cucmjfk
Earth’s colossal #crater count complete. Just 128 confirmed impact craters have been spotted on Earth’s surface
▻http://news.sciencemag.org/earth/2015/06/earths-colossal-crater-count-complete #géologie #geology
Phantom Springs Cave Expedition 2013
Deep in the desert of West Texas lies Phantom Springs cave. Exploration divers have hit a record depth of 462ft/140.8m making it the deepest natural #underwater cave system in the United States! This is a closed site and only those with a scientific permit are permitted to dive. The team set up sediment traps, collected water quality data, surveyed over 8000ft of the cave, and shot hours of high definition video and stills both topside and underwater. The site is a biological preserve set aside for the endangered pup fish that lives in the pools outside of the system.