660K views · 8.2K reactions | WHAT IS CALDERA? A caldera is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. The ejection of large volumes of magma in a short time can upset the integrity of a magma chamber's structure by in effect removing much of the chamber's filling material. #jayography #caldera #geography #maps #educationalcontent | Jayography | Facebook

30K views · 892 reactions | Valles Caldera New Mexico A Stunning Volcanic Caldera in the Jemez Mountains in Northern NM. | Wandering Out Yonder | Facebook

412K views · 10K reactions | Red Beach is a volcanic sand beach on the Aegean island of Santorini. The beach is composed of black and red pulverized volcanic rock from the nearby Santorini caldera. The area is prone to landslides, and since 2013 parts of the beach have been inaccessible due to the slides, so be careful. But man, is it beautiful. ☀️ #Greece #Santorini #RedBeach #Beach #Akortiri #Travel #Sun #Travelgram #Instatravel #HansonsOnHiatus | Digi-Dude Nate | Facebook