SECTION OF THE SOUTH JOQGINS. 



171 



and different kinds of scalarifonD and epidermal tissues. In 

 the lower bed is a coaly stomp and an irregular layer of 

 mineral charcoal, arising apparently from the decay of similar 

 stumps. 



ft. 



2<J 



in. 

 



Coal-group 29. 



{( Iray and carbonaceous slialc and gray sandstone) 

 I mli'ivlay, Stigmaria. 

 i '"a!, and coaly shale, 5 feet. 

 L'ndcivlay, 6 feet. 

 t 'no/, coaly shale, and ironstone, G feet. 



Coal, 4 feet 21 



Argillaceous underclay, Stigmaria. 



This is a group of unusually thick beds, indicating long 



quiescence. The roof includes laminae of coal, some of them 



composed of the bark of Siglllaria catenoides, also an erect 



Sigillaria rooted in the coal below. The coal and coaly shale 



exhibit remains of Sigillaria, Cordaites, LepidophyUum^ and 



( 'ilpcritcs ; and one layer has many hard pyritized fragments of 



wood. The mineral charcoal has vascular bundles of ferns, 



coarse scalariform tissue, and porous tissue. The underclay 



rests on a bed with Naiadites. 



(Underclay, Stigmaria, and gray and carbonaceous 



shales) 18 



( Shale and coaly layers. 



Coal-group 29a. ...K Coal, 4 feet 4 



( Argillaceous underclay, Stigmaria. 



The roof has obscure fragments of plants and stumps in the 

 state of mineral charcoal. The coal shows impressions of flat- 

 tened trunks, probably Sigillaria;. This coal contains a great 

 variety of tissues, especially bast and scalariform of different 

 kinds, and epidermal. My measurements in this part of the 

 section differ somewhat from those of Sir W. E. Logan, who, 

 I suppose, had not a good opportunity of examining the two 

 last coals. The coal 29a is now mined by an adit from the 

 shore, called the "New Mine." 



(Sandstone and shale. One sandstone has many 

 large erect Sigillaria;, some of them with rough 

 and furrowed -bark) 35 



Argillaceous shale and ironstone. 



Coal, 4 inches. 



Underclay, dark-coloured, 2 feet. 



rv-i _„ on Coal and coaly shale, 2 inches, 



oal-group 3- <( ^ g ^^ 



Coaly shale, 2 inches. 



' 'oat, 1 inch 3 



Soft argillaceous underclay, Stigmaria. 



The roof has bark of Sigillaria preserved in ironstone. The 

 coal is pyritous, and cousists of layers of mineral charcoal 



