So Mineral FroJii^io:is 



furf, and worn in regular fpherlcal fhapes, are all a commixture 

 of thcfe varieties, and exhibit a fingularly variegated appear- 

 ance. An examination of this alTemblage of fpeclmens will 

 perhaps afford you a complete idea of the mineralogy of that 

 part of the country. To account for the nitermixture of fo 



many different kinds of flone, many of them effentially dif- 

 tlnd froni each othet* ; I firfl imagined that they might have 

 been conveyed from different and diftant parts of the lake by 

 the motion and turbulence of the vv-aters ; and this indeed 

 feems to be partially the cafe. But when I came to infpecft 

 fome parts of the banks I found all that variety Interfperfed in 

 great numbers among the clay of which they were compofed. 



This is efpecially true of that part of the {here on which the 



garrifon of Ofwego flands. It is here fixty or feventy feet 



J 



high, almofl perpendicular, confifting of clay, refling on a Iblid 

 bafis of rock, nearly level with the furface of the water, where 



it exhibits a fhatter^d appearance. . Now it is almofl impofil- 



% - 



ble to believe that fo great a variety of flones fhould be natur- 



ally formed, in one place and of the fame fpecies of earth 



They muft therefore have been conveyed there hj fbme ex- 

 traordinary means. 1 am inclined to believe that this' may 



* 



4 — -m - — 



have been effedled by fome mighty convuifion of nature, fuch as 

 an earthquake or eruption ; and perhaps this vaft lake may be 



confidered as one of thofe great fountains of deep which were 

 broken up when our earth was deluged with water, tliereby pro- 

 ducing that confufion and diforder in the compofition of its 



furface, which evidently feems to exift. 



One 



•t. 



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