RUSSELL FORK FAULT OF SOUTHWEST VIRGINIA 361 
a slighter movement has taken place, to accommodate the thrust in 
a direction lateral to the main Russell Fork fault line (Figs. 5 and 6.) 
At a few points, notably at Skegg Gap (Fig. 7), the slickensides 
and planes of movement within the zone of faulting indicate a com- 
_ bination of the main southeast-to-northwest thrust with the side or 
southwest-to-northeast thrust, making the direction of movement 
a resultant of the two. ‘The slickensided surface here shows the 
result of pronounced movement and the white quartz pebbles 
which are so numerous in the Lee formation are planed off flush 
Fic. 5.—View of river bank looking southeast near B.M. 1227. Massive and 
undeformed sandstone on left of fault trace with deformed shale at right. Strong 
horizontal slickensides are formed on the face of the sandstone at this place. 
with the matrix. It is important to mention that a short distance 
northwest of Abners Gap the writer saw the most abundant evidence 
of thrust in the mashing and crushing of shale in a fine exposure 
and that here the slickensides indicate movement at an angle of 
45° to the horizontal in a due north direction. At this point the 
fault trace is more nearly athwart the main direction of thrust, 
and here, if anywhere, would be expected evidence of strong 
overthrust. 
In the Little Pawpaw fault there was seen little indication of 
shearing but abundant evidence of compression and slight over- 
thrusting. | 
