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<br />APPENDIX <br /> <br />Classification of Mass-wasti~ Phenomena <br /> <br />Mass-wastino is a term used to refer to a variety of processes by <br /> <br />.' <br /> <br />which large masses of earth material are moved by gravity either slowly <br />or quickly from one place to another. <br /> <br /> <br />Slow Movement <br /> <br />a. Creep - the slow down-slope movement of earth material <br /> <br /> <br />which is usually not perceptible except <br /> <br /> <br />through extended observation. <br /> <br />(1) ~ creep - down-slope movement of soil <br /> <br /> <br />(2) talus creep - down-slope movement of loose <br /> <br /> <br />rock debris <br /> <br />(3) ~ ~lacier creep - down-slope movement of <br />tongues or lobes of rock debris down <br /> <br />"/1. ...J. -?/- <br />,-"II,llfe 11 /~/~-' cree'p' , '. ' . axes of valleys <br /> <br />Soil creep is quite common in the San Juans and any area where the <br /> <br />slope of the land is very high. In a sense, the active portion of the <br /> <br />18 <br /> <br />o <br />o <br />o <br />-.] <br />o <br />OD <br /> <br />- <br />