13 



ing had occasion to visit the same, but judging from speci- 

 mens shown us. The hills near the Susquehanna appear to be 

 composed principally of shining argillite or glimmer sheiffer. 

 There is a fine quarry of slate in the township of Peachbottom ; 

 the quality of this useful mineral is very good, and is much used 

 throughout this and the adjoining counties, for roofing slate. 



We subjoin a partial list of mineral species found in this 

 county ; it cannot but be imperfect, but may answer for a com- 

 mencement: 



QUARTZ. — Hyalin, milky, ferruginous, drusy, auriferous, 

 massive, Lydienne, prase. 



Colophonite, garnets, wavelite, chlorite, epidote, pipe clay, 

 haloysite, talc, amphibole, mica, feldspar; 



Carbonate of lime, white, yellow, blue, &c. 



Marl 



Oxides of iron — octohcedral crystals of, and micacious, mag- 

 netic, hcemetitic. 

 Sulphuret of iron. 



Copper — native, red oxide, carbonate, sulphuret. 

 Gold — native. 

 Lead — sulphuret. 



The ostensible object of the author's visit to the county of 

 York, was to examine " the gold region and gold mines." How 

 far this end has been attained, you are the better judge. Hav- 

 ing tarried a much shorter time than our desires would have 

 dictated, we were prevented from examining in detail the en- 

 tire mineral riches of this interesting district ; still, we have 

 endeavored to pourtray the leading geological features of the 

 county. 



