J)escri])tive Cqtalogue of Roq^s and Mineral. $61 



stone usually exhibits some shade of bluish white, (No. 51.) 

 it is sometimes mixed with magnetic pyrites (56); and is 

 frequently traversed by veins of calcareous spar containing 

 fibrous actynolite.(56) 



26, 27, 28, and 29. Chalcedony^ Ja^per^ Agate^ RedJas- 

 per^ and Ytlloro Jasper, of Stokes. These siliceous miner* 

 ^Is, including No* 79, and numerous varieties of the same, 

 j are found in one field, scattered over the surface of the 



ground. Pieces of coarse chalcedony, five inches in diam- 

 eter, were among the number. 



30^44. Varieties of Quqrtz, intended to illustrate the 

 following remarks. — A singular deposit of quartz is scatter- 

 ed over this region, covering a tract of country in a nar- 



W 



S^ 



passing through the counties of Granville, Orange, and 

 Chatham, and embracing almost every variety of this min- 

 eral mentioned in mineralogical virorks. Indeed, nearly all 

 those in this collection were obtained in one field, six miles 

 West of this village. Besides several other foreign sub- 

 stances, incrusting or penetrating the quartz, fragments 

 similar to No. 41, associated with a large proportion of 

 specular oxide of iron, form a pretty regular line from 

 Hillsborough southward into the county of Chatham, more 

 than twenty miles. ' 



45. Mica Slate^ from the Saura Town mountains, in 

 Stokes. At the base of the mountain are found heaps of 

 yellow micaceous sand, resembling pyrites, and often delud- 

 ing the inhabitants with an impression that in contains 



gold. 



46. Tortuous Mica Slale^ from the western part of S. 



Carolina. 



47—49. Petrified Wood—^o, 47, is from Fayetteville; 



Wayne Co.; and 49 from 

 e vicinity of this village. In each of these places, it oc- 



th 



curs in very numerous fragments, usually scattered over 

 sandy plains. It is highly siliceous, and fi^quently exhibits 

 veins of chalcedony. No. 49 is found over red sandstone. 

 The banks of the Neuse id many parts of its course are 



fttrewed with pieces like ^o. 48. 



50. Actynolite, associated with calcareous spar, which 



traverses the Stokes limestone in veins. 



51. Blue Limestone^ of Stokes. 

 Vol.. v.— No. 2. 34 



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