Stevenson.] ^^'^ [Nov. 21, 



from its source, the stream first reaches the line of fault, near which it lies 

 for about six miles, crossing it more than once in that interval. Tliis is 

 between the mouth of Indian creek and the western line of Tazewell 

 county. At, say, twenty -five miles further west, measured directly, the 

 river again reaches the fault, and, within the next seven or eight miles, 

 crosses and recrosses the line more than once, if the map may be trusted. 

 Above the former space, the interval between river and fault gradually 

 increases to not far from six miles with the mountains of the House and 

 Barn synclinal in it. Between the two contact spaces, the river channel- 

 way is bow-shaped, the interval increasing rapidly to six miles on Lewis 

 creek, and thence diminishing slowly until it disappears below Lick creek. 

 Below the second contact-space, the interval steadily increases, and at 

 length the river flows very near the line of the Copper Creek fault. 



, The Clinch Fault. 



The course of the Clinch fault in Scott county is shown approximately 

 by Buckner's ridge, composed of Knox beds, except near the line of Rus- 

 sell county, where it is made up of Quinniraont beds. The fiiult enters 

 Russell county very near the mouth of Guest's river ; is crossed at the 

 mouth of Russell creek (Squier) ; is cut by Clinch river both above and 

 below the mouth of Whetstone creek ; and by Lick creek at but a little 

 way from the river. At this last locality, the course changed somewhat 

 to the northward, so that the fault is crossed by Caney fork of Dump 

 creek very near Abram Kiser's house, and by Dump creek very near 

 the mouth of Hurricane fork. Beyond this stream it was not followed. 

 It should be found passing through the loop of Buchanan county at not 

 more than four miles north from the southernmost projection of Big Butt 

 mountain, on whose southerly slope Robinson fork of Lewis creek has its 

 sources. 



Thus far the structure has been comparatively simple and the direction 

 of the fault-line almost straight — at least, its deviations can hardly be 

 shown on a map of ordinary scale. Where first observed by the writer, 

 on the north fork of Clinch river, in southern Scott county, the relations 

 are apparently as shown in Fig. 4 ; but, within a very little way. where 

 the road crosses Buckner's ridge, there is no upturning at the fault, the 

 Lower Helderberg, Oriskany and Hamilton continuing to the very line of 

 fault without change of dip. But still further eastward, the Pattonsville 

 and Wallen Valley faults having died out, and the Stone Mountain anti- 

 clinal having become fully dev»loped, the reversal of /lip is shown again, 

 so that the Hamilton, Lower Carboniferous and Quinnimont are crossed in 

 succession as one goes north-westward from the line of fault. On Stony 

 creek, also in Scott county, the same condition is shown even more clearly, 

 for there the Knox beds have been removed by erosion for some distance, 

 so as to expose the Silurian beds, as represented in Fig. 5. Thus far the 

 ridge marking the course of the fault is Knox, but on the road leading 

 from Osborn's ford to Guest station, the "hanging rock" is Quinnimont. 



