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University of California . 



[Vol. 8. 



lating line from 50 to 125 feet higher than the present outer 

 edge. Back of the terrace the slate hills rise as abruptly as a 

 river bluff. One of the most significant of the alluvial fans 

 occurs in front of a comparatively small ravine which does not 

 contain a creek today and has not in recent times yielded suffi- 

 cient water to cut a channel across the terrace. 



Redneck Rock, probably 150 feet long, 100 feet wide and 

 100 feet high, is the largest of a series of huge erratics extending 

 southeasterly from near the river to the valley of Chinech Creek. 

 They are composed of hornblende schist identical in character 

 with the Salmon hornblende schist formation. They rest on a 

 slope having the irregular topography of a landslide deposit, 

 and associated with them are many angular and subangular 

 fragments of the other rock species occurring in the valley of 

 Chinech Creek. This landslide came a distance of several miles, 

 and appears to have run out on to the 120-foot terrace at the 

 time it was the valley floor. By subsequent erosion many of 

 the huge rock masses have been let down to the river's edge. 

 Redneck Rock is very prominent because of its steep face toward 

 the river and its overlooking the central basin like a giant 

 sentinel. It rises to probably 300 feet above the stream level. 



Opposite Orleans, and just southwest of Redneck Rock, there 

 is a very prominent terrace remnant which has been extensively 

 mined by Mr. Ferris. In the old mine facing Orleans the bed- 

 rock of black slate is 135 to 150 feet above the river, and the 

 outer edge of the terrace is about 200 feet above the stream. 

 The gravel is fifteen to twenty feet thick and covered by a strati- 

 fied sandy silt and gravelly layers of a reddish brown color. 

 The present mine shows flat rock platforms at 150 feet above 

 the river with numerous depressions fifteen feet lower. Over 

 these there are from ten to twelve feet of moderately fine river 

 gravel, whose upper limit is a rather sharp and straight line. 

 It is overlaid by about ten feet in thickness of a finely stratified 

 dark blue silt and muck, containing vegetable debris, including 

 pieces of wood. Much of this wood has been lignitized, and Mr. 

 Ferris says that when he finds a piece of sufficient size he 

 burns it in his forge for sharpening tools. Some fragments that 

 were not converted to lignite were secured and forwarded to 



