Near the base of the pali and eastern 61g flow margin, Geologists w...
Detailed Description
Near the base of the pali and eastern 61g flow margin, HVO geologists witnessed a breakout from an inflating tumulus (upper left). The pāhoehoe flow formed a crust as it cooled, but could not contain the amount of lava being supplied from the tumulus. This ruptured the rigid crust (broken crust at the top of the breakout), and fluid lava poured out.