GEOLOGlCxVL SOCIETY OF MANCHESTER. 



27 



Lyell has been induced to propose it in consequence of an 

 examination of a portion of the state of New York, subse- 

 quently to his visit to Pottsviile. At the " Lehigh Summit 

 Mines^^ a bed of anthracite, more than forty feet thick, is 

 quarried in open day, forty feet of sandstone being entirely 

 removed to work the coal. With respect to the long ob- 

 served fact, that the anthracite coal is confined to the At- 

 lantic side of the AUeghanies, and the bituminous to the 

 more inland and less disturbed region ; and with respect to 

 the supposition that the former belonged to the transition, 

 and the latter to the secondary period, Mr. Lyell states, that 

 both varieties clearly overlie the old red sandstone, and con- 

 tain the same vegetable remains ; and he is of opinion, that 

 the change from the bituminous to the anthracitic condition 

 was a concomitant of the upheaval and folding of the rocks, 

 the conversion being most complete where the beds have 

 been most disturbed. Mr. Lyell has also examined the 

 cretaceous strata of New Jersey, accompanied by Mr. 

 Conrad, and he states that the fossils which he collected 

 from its different members, bear a striking analogy with 

 those of the equivalent series of Europe, especially of the 

 traie-tufeau of Normandy. He has likewise examined, in 

 company with Professor Siliman, the new red and intrusive, 

 trap in Connecticut ; and, lastly, he has visited the falls of 

 Niagara, and is of opinion that he can prove their recession 

 by new arguments, drawn from the position of a fluviatile 

 deposit which he has traced below the cataract. 



GEOLOGICAL SOCIETY OF MANCHESTER. 



Thursday, 2Sth October, 1841. — The third annual meeting 

 was held this evening, Dr. Black in the chair. 



In the report which was submitted on this occasion, the 

 Council armounced the publication of the first part of the 

 Transactions of the Society ; the adoption of the petition 

 addressed by them to the Master General of the Ordnance, 



