Geologic map of the Cochetopa Park and North Pass Calderas, northeastern San Juan Mountains, Colorado

Panoramic view of Cochetopa Dome (sequence of rhyolitic lava flows within caldera) and north walls of Cochetopa Park caldera, viewed from south. Cloud-obscured northwest caldera rim, at left of image, is Sawtooth Mountain (12,147 ft); northeast caldera rim is marked by Razor Creek Dome and Green Mountain on right side. Light-colored eroding outcrops in foreground are weakly indurated tuff and volcaniclastic sedimentary fill of the caldera basin. C o ch et o p a C an yo n

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