Vol. 6] Eeid: The Geomorphogeny of the Sierra Nevada. 129 



The next noteworthy peculiarity of the south part of Little 

 Valley lies in the existence upon the west fault-scarp of a distinct 

 hanging block. This is shown' in a number of instances. At first 

 glance there seems to be a number of these blocks, but a more 

 careful examination reveals the fact that the tops of all the sep- 

 arate blocks lie in the same plane, sloping up gently to the north. 

 All have the same profile and the larger blocks have the same 

 dimensions. The tops are level, joining the steep scarp on the 

 west at a sharp angle. The east sides slope clown to the valley 

 at a slightly less angle than the western scarp, the bases being 

 covered with granite detritus. The various blocks are separated 

 by stream gullies, and the smaller ones occur where the stream 

 erosion has been greatest. The characteristics are those of a long, 

 narrow fault-block resting upon the lower part of the steep 

 western scarp that has been dissected by the streams flowing 

 across it. It is also to be stated that the line through the tops of 

 the blocks makes a small angle with the line in the valley bottom, 

 so that the northernmost blocks are little above the valley floor, 

 while the southernmost are several hundred feet above it. These 

 blocks end abruptly at a point about opposite the upper entrance 

 to the canon of the creek, and below a decided change in slope in 

 the main range crest to the west. 



The last peculiar characteristic of this portion of the valley 

 here needing description is the eastern fault-scarp. Franktown 

 Creek Canon strikes northeast and southwest, separating a steep 

 unbroken slope in the northwest from a longer and gentler one 

 in the southeast. The canon walls are extremely sharp and pre- 

 cipitous, and both rapids and falls occur in the creek itself. The 

 foot of the steeper slope lies about a quarter of a mile to the west 

 of the foot of the slopes south. Further, it will be noted from 

 the map that north of the mouth of the canon there is a comple- 

 mentary jog to the east in the slopes up from the valley, and that 

 the foot of the slopes north of this jog are in direct prolongation 

 of the foot of the slopes south of the creek. In other words, the 

 portion of the east fault-scarp lying east of the north part of 

 Little Valley has been shifted a quarter of a mile to the west. 

 This shifting is also plainly expressed in the topography in Little 

 Valley. 



