Mineralogy and Geology. 121 
“The New Red is seen in the section dipping northward against or 
toward a country, the surface of which is three hundred feet lower than 
its own. ere is no evidence of a wide extension of New Red over that 
lower surface in the New Red age. On the contrary, not a hillock or 
gravel patch of New Red is to be found throughout the whole Paleozoic 
country to the north or west of this, its present absurdly constructed over- 
anging and outdipping margin. How is this to be accounted for ? 
“There must have been some barrier to the New Red waters between 
the Schuylkill and the Susquehanna, to correspond with the barrier which 
we see everywhere else between the Hudson and the James i 
synclinal structure to determine the face of the surface at any given 
stage of the process,—and we have the required barrier to the estuary 
of the New Red; the explanation of its top Conglomerate; a good reason 
why there are no New Red traces back of the South mountains; and a 
closer date for the Lignite of Mont Alto.” pease? 
ferring to a plate illustrating the paper, he says, it “is noticeable, 
1. How vast an amount of Paleozoic rock-substance has been swept away ; 
zolc formations ; sup upon these at a still older date, eight others, 
Including the Coal-measures, must have formed their surfaces ; 
ing no cataclysm eac as given for collecting toward 
the New Red sandstone, formations. 
As for the lignite, therefore, it must have been subsequent to the ero- 
Am. Jour. Sct.—Szconp Serres, Vou. XL, No. 118.—Juxy, 1865. aa 
16 : ee ; 
