348 Transactions of the Geological Society of Pennsylvania. 



the plants are comprisfed within a thickness of four feet. In anoth- 

 er place, below Lewiston, eight or ten beds were counted within 

 six feet. 



At the western end of Shade mountain, in a quarry, one hundred 

 courses of marine plants are distinguishable within a thickness of 

 twenty feet ; they are crowded with obscure plants and occasionally 

 crossed by the larger fucoides. In a third place, there are twenty 

 layers of fucoides within the thickness of three feet, and it is suppo- 

 sed that the entire thickness, is not less than two hundred feet. 



At the west end of Shade mountain, the fucus beds extend with- 

 out interruption, to a height of from three hundred to three hundred 

 and fifty feet ; those containing the obscure algse, reach two hun- 

 dred and fifty feet, and at three hundred there are numerous surface 

 slabs exhibiting the Fucoides allegbaniensis in situ. 



It is justly inferred by Mr. Taylor, that there existed various 

 epochs in which numerous surfaces of the shallows of the ancient 

 ocean, were covered by marine vegetation. The fucus beds are 

 composed of argillaceous, slaty and siliceous rocks, laminated and 

 parted by shale. 



Some of the fuci had long flexible and flattened stalks with few 

 branches: the, breadth of the stalks, w^as sometimes over half an 

 inch. 



On the western side of Shade mountain, there are hundreds of 

 beds, some of them not an inch in thickness, but making an aggre- 

 gate of two hundred feet, and the quarries within a mile of Lewis- 

 ton, fiirnish an inexhaustible supply of excellent paving stones, in 

 which the vegetable forms, especially in the weathered specimens, 

 are very prominent. This is perhaps the m.ost remarkable locality 

 of fossil marine plants that has any where been observed. 



2. Gold Region of the U. States. 



A report is made upon this subject by James Dickson, F. G. S. 

 London, by whom the fully ascertained gold region of the United 

 States, is considered as extending from the Rappahannock in Vir- 

 ginia to the Coosa in Alabama — while, at the same time, it is sta- 

 ted, that gold has been found as far south as the Gulf of Mexico, and 

 that it is probable it will untiraately be found to extend to Vermont, 

 Canada, and perhaps the Arctic regions. 



Amidst many failures and discouragements, fresh attempts and 

 discoveries are making, along the vast region bordering on the Blue 



