. Bulletin of the Department of Geology. Geology. 144 University of California Publications. [Geology treme youth; on the east scarp the character of this profile be- tokens a more mature erosion. (3) The valley line of the west scarp is almost a straight line; no valley lobes have been formed. The east scarp presents a very wavy line at its meeting the val- ley, due to the formation of a number of valley lobes. (4) Upon the west scarp are youthful characteristics of a different order. In north Little Valley there occurs the hanging block already noted. This block depends directly-upon the eas
. Bulletin of the Department of Geology. Geology. 144 University of California Publications. [Geology treme youth; on the east scarp the character of this profile be- tokens a more mature erosion. (3) The valley line of the west scarp is almost a straight line; no valley lobes have been formed. The east scarp presents a very wavy line at its meeting the val- ley, due to the formation of a number of valley lobes. (4) Upon the west scarp are youthful characteristics of a different order. In north Little Valley there occurs the hanging block already noted. This block depends directly-upon the east-west faulting noted later, but indirectly it bears upon the age of the high west scarp. The physiographic aspects of the scarp above and below the level top of the small hanging block are not different, and since the faulting which produced the hanging block is more re- cent than the two longitudinal scarps under discussion (to be shown later), the youth of the whole of the high west scarp is established. Further, that part of the west scarp south of the hanging block just mentioned shows another feature of import- ance. This is the sliding of the broken and loose rock material upon the steep slope, whose angle was greater than the angle of rest of the incoherent rock. There is a further peculiarity in that Little Valley has been produced in miniature at one place. None of these features exist upon the east scarp, as the last ves- tiges of any such, if they ever existed there, have long ago been removed. More in detail, the profiles of the two groups of streams upon the west and east scarps are thus delineated in figures 1 and It is to be noted that the west streams have not yet cut downward into the scarp, while the eastern ones have cut dis- tinct gullies or small canons, and developed the three distinct por- tions of a stream that has partly lost the characteristics of extreme youth. The statement that the west scarp is but little degraded, while the east one is much s
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