1884.] iZJ [Stevenson. 



Exposures are wanting for some distance below this Quinnimont wall on 

 Little Stony creek, but the place of the rock in its group seems to indicate 

 that here the Knox and the Quinnimont are in contact, as in Fig. 6. No 

 Quinnimont occurs east from the mouth of Russell creek, and thence to 

 the Caney fork of Dump creek, the Middle Coal measures (Lower Coal 

 measures of Pennsylvania) are in contact with the Knox group. 



The New Garden Fault. 



But at or very near "Bee branch of Caney fork of Dump creek, a cross- 

 fault is given off, which extends in a south-west direction for about three 

 miles. At that distance, it unites with the New Garden fault, which first 

 shows itself at not far from three miles below the mouth of Dump creek, 

 and follows very nearly the line which would have been followed by the 

 Clinch fault liad not its course been changed at Lick creek. The cross- 

 fault gives a wedge-shape to the Knox area, the point being at Bee branch 

 of Caney fork, and brings that group into contact with Hamilton and 

 very probably with Clinton (?) shales. The New Garden f\iult is crossed 

 by Dump creek, at barely a mile from the river, and there the Lower Car- 

 boniferous limestone is brouglit into contact with shales, much contorted 

 and belonging probably to the Knox group. 



No examinations were made along the immediate line of fault between 

 Dump and Lewis creeks, though the southerly side was followed some- 

 what closely for several miles. A very great change takes place in this 

 interval. On Dump creek, Middle Coal measures on the north side and 

 Devonian or Silurian on the south side of the Clinch fault are in contact ; 

 but the downthrow between the faults increases so that before reaching 

 Big Butt mountain, the Middle Coal measures on the north side of Clinch 

 fault are in contact with Lower Coal measures (Quinnimont) on the 

 southerly side ; while, according to Mr. Squiers, an anticlinal has devel- 

 oped along the northerly side of the New Garden fault so as to bring the 

 Lower Carboniferous limestone into contact with the Knox. The writer's 

 examinations were not made in sufficient detail along Lewis creek to decide 

 respecting the exact relation of the limestone and coal, but the strip of 

 Lower Carboniferous must be very narrow. Mr. Squiers' diagram as given 

 in Science, No. 68, is reproduced in Fig. 7. 



The New Garden fault continues evidently in the direct line, being 

 crossed by Clinch river in the bend opposite mouth of Indian creek ; pass- 

 ing south from the Baptist Valley road and thence for four miles to Low's 

 fork of Indian, where the road turns into the valley ; crossed by Cavitt's 

 creek near the forks in "Wright's valley, and, according to Prof. Lesley, by 

 the Jeffersonville and Abb's Valley road near Capt. Frank Peery's house, 

 six miles from .letTersonville. As shown from mouth of Indian to Cavitt's 

 creek, this fault brings the top of the Lower Carboniferous into contact 

 with the Knox. The dip of the Lower Carboniferous shales is usually 

 abrupt and no upturning was observed near the line of faulting. The 

 downthrow evidently increases eastward, for on Cavitt's creek the very 



PROC. AMER. PHILOS. SOC. XXII. 118. Q. PRINTED FEBRUARY 19, 1885. 



