The mountain flanks rise steeply from the bottom of the valley.
They made good speed as they climbed and scrambled toward the nearest mountain flank.
Scientists suspended activities in the crater and the mountain flanks, but the risk of a major eruption was deemed low.
Coyote could clearly make out the timberline along the mountain flanks.
It was incandescent lava pouring down a distant mountain flank.
They came to a narrow pass between two mountain flanks.
It was four miles from the mountain flank and still coming.
All that remained of the mountain flank was a glowing dust that quickly settled to the ground.
Ehrenberg to the west accesses areas of the western mountain flank.
And out from behind the mountain flank to the east it came, a hemiolia capable of keeping up with any craft that sailed.
