Mr. Weaver on the Geological Relations of the South of Ireland. 61 



of Shallee mountain, situated to the north of the Keeper mountain, and south- 

 west of the village of Silver Mines. 



Here within the distance of 120 fathoms, are four vertical veins ranging about north and south, 

 and nearly parallel to each other, composed of sulphate of barytes, containing fine-grained galena 



Pennsylvania, Virginia, and Ohio, the continuous coal-bearing measures include, not unfrequently, 

 intercalated beds of limestone, which often contain marine animal remains ; and the sandstone 

 and shale accompanying the coal, contain also in some places marine shells and other remains'. 

 Some of the coal measures are said also to exhibit in places fossil freshwater shells ; and in this 

 series also, beds of sandstone conglomerate are not of uncommon occurrence. The continuous 

 coal-bearing measures extend from the region of the Great Kanawha river to the south-west 

 through Western Virginia, and the eastern parts of Kentucky and Tenessee into the northern 

 parts of Alabama, and to the north-east, as above stated, through Pennsylvania into the State of 

 New York. But the main body of the carboniferous limestone, forms the great basis of the coal 

 series. Yet, even in that main body, valuable beds of coal are found adjacent to the lower parts 

 of the Ohio river in Kentucky, Indiana, and Illinois, and near the conflence of the Missouri with 

 the Mississippi. 



In the association of beds of limestone with the coal-bearing measures, we perceive an analogy 

 to similar phsenomena, in parts of the coal tracts of the North of England and of Scotland ; while in 

 the appearance of beds of coal low down in the carboniferous limestone, we find a parallel also in 

 Northumberland, in the North of England-. 



In its western extent into Arkansas, the carboniferous limestone appears to be supported partly 

 by the old red sandstone, and partly by a greywacke tract; while in the higher regions of the 

 territories of Arkansas and Missouri, it supports extended, continuous coal tracts^. 



Speaking generally, the great valley of the Mississippi, of which the mighty stream of that name 



or two of the species, derived from those quarters, really belong, the precise localities not being 

 given. 

 In the Carboniferous series^ Localities. 



Calymene Bluraenbachii Black Rock on Niagara. 



Asaphus limulurus Lockport. 



A. Wetherilli Near Rochester. 



A. myrmecoides Genessee county. 



A. pleuroptyx Genessee and Helderberg. 



Brongniartia platycephala Lockport. 



Dipleura Dekayi Lockport. 



Trimerus delphinocephalus Niagara county. 



Paradoxides Boltoni Lockport. 



(See Dr. Harlan in Transactions of the Geological Society of Pennsylvania, vol. i. Prof. Eaton 

 Geol. Text Book, 2nd edit.; and Annals of the Lyceum of the Natural History Society of New 

 York, vol. i.) 



I may here add, that the band of transition limestone which crosses the river Hudson, north of 

 the Highlands, and on which Newburg is situated, is associated with clayslate, greywacke and 

 greywacke slate ; and the specimens thence derived, in the museum of the Lyceum at New 

 York, exhibit numerous organic remains similar to those which I have noticed in Gloucestershire, 

 Kerry, &c.— April, 1837. 



' Transactions of the Geological Society of Pennsylvania, vol. i. p. 255. 



* See on this subject the first volume of the Transactions of the Natural History Society of Nor- 

 thumberland, Durham and Newcastle, which contains many valuable papers in illustration of the 

 relations of the carboniferous series. 



^ See Memoirs of a Captivity among the Indians of North America, by John D. Hunter, 1823, 



