.260 Descriptive Catalogue of Rocks and Minerals. 



ville, Person, Orangje, Chatham, Rockingham, Randolph, 

 and Stokes; in all which places, it is employed extensively 

 for various useful purposes in building. Remains of In- 

 dian utensils, formed of these substances, are also very 

 common. 



21. Flint, (Hornstone,) associated with compact earthy 

 limestone, from Wake — occurs in the sandstone formation. 

 Small pieces of carbonate of lime, usually of dark brown 

 colour, are found in various parts of this formation; but no 

 bed has yet been discovered, though it is a great desidera- 

 tum, lime being transported from Fayettville to this place, 

 70miles. Mr.Maclure(Obs. on the Geology of the U. States,) 

 does not encourage us to expect an extensive bed of lime- 

 stone in the sandstone formation. 



22. Mica slate, constituting the bed of the plumbago of 

 Wake. This singular rock, which sometimes appears of a 

 cherry red, as in this specimen, and sometimes of a glistening 

 pure white, as in No. 85, and sometimes of the two blend- 

 ed together, lies between the gneiss mentioned under No. 

 16, on the east, and the sandstone on the west, being cover- 

 ed by the latter on its western declivity. As it appears in 

 the walls of the mine of plumbago, it is seamed horizontal- 

 ly, by which means it is easily obtained in large masses 

 which are used in the neighbouring county for underpinning 

 and steps, though it is evidently too tissile and absorbent to 

 be durable as a building stone. It however, as might be ex- 

 pected, is said to be a most excellent fire stone. 



23. Chlorite interspersed zvith crystals of hornblende, from 

 Wake. — Occurs in the vicinity of No. 22, and is obtained 

 in sufficient quantity for chimnies. 



24. Marly limestone of Wayne Co., in the alluvial coun- 

 try, a little east of the primitive, supposed to be the kind 

 referred to by Mr. Maclure, (Obs. on the Geol. of the U. S. 



25. Primitive granular limestone of Stokes Co. This 

 county, situated in the north-western part of the state, I 

 have not yet had opportunity to visit; but from the number 

 of specimens sent from there (several of which are among 

 this collection,*) and from their extensive formations of iron, 

 limestone, clay, soapstone, &c. I am induced to believe that 

 it offers an inviting tield to the mineralogist. This lime- 



* Viz. No?. 5, 26, 27, 28, 29, 45, .'SO. 5], 56, 70, 76, 77, 79. 



