Stevenson.] ^OU [Jan. 21, 



The limestones of No. 17 are well shown only on the northerly side of 

 Moccasin ridge along the Stony creek road as it descends to Copper creek. 

 They vary from flaggy to massive, from silicious to very pure, and for the 

 most part are gray. Balls of chert were seen in some of the beds. Nos. 

 19, 20 and 21, are practically one. The upper part is massive and a fairly 

 good limestone ; it contains some fossils but they are indistinct. Further 

 down, the rock becomes flaggy or thinner bedded and the silica increases, 

 until tlie whole is little more than calcareous sandstone. Pyrites begins 

 near the bottom of No. 19 and increases to the bottom of No. 21. This 

 rock bears remarkably close resemblance to that which lies at the base of 

 the Knox group along the line of the Hunter Valley fault. 



Clinch mountain is a bold rugged ridge, very narrow, and showing a 

 sharply serrate crest. For nearly 50 miles it has but one water gap, and 

 its slopes are so steep that no wagon road passes over it within Scott 

 county, while trails for riding animals are few and difficult. 



The Medina sandstone is reached at the summit of the mountain, and for 

 a long distance forms the southerly slope, the newer rocks being found 

 only near its foot. It is exposed imperfei;tly in Moccasin gap, but its com- 

 position is shown there better than at any other locality within Scott 

 county. The succession as there observed is as follows : 



1. Massive sandstone, much of it conglomerate, dark gray 



to almost milk white 75' 



2r Massive sandstone, almost like quartzite, no grains 

 shown on weathered specimens ; weathered sur- 

 face is rough and jagged ; color on fresh surface, 

 bluish while 150' 



3. Concealed, but evidently containing some shale as 



well as some white sandstone 30' 



4. Like No. 2 except that in some portions the surface of 



weathered specimens glistens, while the other 

 always shows a dead white surface ; weathered 

 surface irregular 60' 



Total 315' 



In many respects, this rock bears much resemblance to the silicious beds 

 of the Knox group ; so much, indeed, that one would find difficulty some- 

 times in deciding the relations of a hand specimen. 



Immediately above No. 1 of the section, there is in the gap a hard flinty 

 rock belonging, in all probability, to the Lower Helderberg. It is irregu- 

 larly bedded, loaded with oxide of iron, contains no fossils, and is not more 

 than 15 or 20 feet thick. Above this come the Hamilton shales. The 

 Clinton group and the Oriskany sandstone are evidently absent. 



The Medina carries a brown hematite which has been examined at 3, 6, 

 and 14 miles east from Moccasin gap. Samples taken from Mr. Ayres' 

 property at 3 miles above the gap were analyzed by Mr. McCreath, with 

 the following results : 



