Craters of the Moon National Monument, Idaho
July 1956 and 13 July 1968
Devil's Sewer Sign, July 1956, Gene Halzaphel
Devil's Sewer Formation, July 1956, Gene Halzaphel
Ice Cave, Boy Scout Cave, 13 July 1968
Northern end of Crater, 13 July 1968
Plant growth on north side of crater, 13 July 1968
North side of crater, 13 July 1968
Tree in lava flow, 13 July 1968
Foliage around crater, 13 July 1968
Triple Twisted Pine, 13 July 1968
Triple Twist Pine signage, 13 July 1968
AhAh Lava, 13 July 1968
Lava flow, 13 July 1968
Pahoehoe lava, 13 July 1968
Lichen growing on lava flow, 13 July 1968
Mold of a tree in lava, 13 July 1968
Spatter Cones, 13 July 1968
Intervals in strata denoting eruptions, 13 July 1968
Intervals between eruptions sign, 13 July 1968