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SECTION oF SILURIAN Formation, Rocksrmer Co., Va.—From 8. E. to N W. 20 Miles, 
srtcenlpmsibll ect ceca eS 
DESoRIPTION OF SECTION.—1. The leadin 
Pennsylvania Sortie Rogers), 2 
Arch, (a) E. 
i sear Se te. 3 ight-hand end ee 
on), the Archaean rocks are marked, W Arch, (a), (b), @ ‘while an pA nae Ai. ruding near the 
of the Blue Ridge is _ rked, E. sai The beds of san dotted,—e bie m rv Me less conglomerate ; beds of shale have closely 
ruled lines ; limestone strata are bi @ having longitudinal and some cross-rulin ngs, to distingu 
si have double longitudinal | lines, 6. "Heights above tide tered a 
e eldspathic rocks east of Blue 
re indicated on the right 
of ay seer division of the secti 
