mass - wasting is the type of mass movement that is the slumgullion slide.
mass - wasting is the type of mass movement that is the slumgullion slide.
what type of mass movement is the slumgullion slide?
mass - wasting
the earthflow, a slow moving landslide, crawled down the valley about 700 years ago creating the long and wide mass. the earthflow lies a few miles south east of lake city. the landmark site covers and is owned by the us forest service and the bureau of land management. it is "a striking example of mass wasting (the movement of large masses of earth material)." lake san cristobal was dammed by the earthflow. a second earthflow has been moving continuously for about 300 years over older stable rock. it moves at a rate of about 7 meters (23 feet) per year.
slumgullion earthflow
section::::slumgullion slide.









































slumgullion pass is named for the nearby slumgullion earthflow, a gigantic landslide whose yellowish soil reminded early settlers and miners of slumgullion stew.









































the slumgullion slide began about 700 years ago when weak volcanic tuff and breccia on the southern flank of mesa seco slumped several miles down the steep mountainside. approximately 300 years ago, a second earthflow started from the top of the mountain and is still active, moving as much as twenty feet (six meters) per year. trees growing on the newer slide are tipped at odd angles.
slumgullion pass