448 



E. B. BRANSON A MlSSISSirPIAX DELTA 



miles apart before folding and faulting took place, and the drawing that 

 accompanies this paper is an attempt to represent the original structure 

 and relations of the formations. 



CoMPAEisox OF MississiPPiAx IX Cloyus Mouxtaix axd xorth of 



jSTaeeows 



The formations in Cloyds Mountain consist of 757 feet of Price- 

 sandstone overlain by 2,578 feet of Pulaski shale, but the total thickness 

 is undetermined, as the top of the Pulaski is faulted out. The jS'arrows 

 section shows 200 to 300 feet of Price sandstone, 20 to 30 feet of Pulaski 



3\' < 



• 4 



5. /- 



6 



7-° 



3/ 



8 3' 



1. XaiTOws 

 12. Pearisburg 



82 gi 



Figure 1. — Virginia West of Roanoke 



3. Section lino 



4. Dublin 



6cale lln. = 40Mi. 



5. Pulaski 

 0. New River 



shale, 1,180 feet of Greenbrier limestone, 1,350 feet of Bluefield lime- 

 stone, sandstone, and shale, and 1,200 to 1,300 feet of Hinton sandstone 

 and shale. The measured thickness at J^Tarrows is about -1,000 feet and 

 in Cloyds Mountain 3,338 feet, but as the top is missing in the latter the 

 total thickness may be as great or greater than at Narrows. 



Section of the Mississippiax ix Cloyds Mountain 



PULASKI t^IIAJ.E 



The Pulaski is a variegated shale ranging in color through various 



shades of pink, yellow, green, blue, and purple. 



The colors change fre- 



2 These formation names are used by M. R. Campbell, in folio 2(5 of the T'. S. Geo- 

 logical Survey, for the I'ocahontas area, which lies 10 to 15 miles west of the area under 

 discussion. 



In his map of the Cloyds Mountain area M. K. Campbell shows no Pulaski along the 

 Dublln-Pearisburg road, but its outcrops are excellent for nearly a mile across the strike. 

 The road crosses the mountain about half way between the western end of the Pulaski 

 outcrop and "Cpi-," at the nortliern edge of Campboll's map. — Bull. Geo!. Soc, America, 

 vol. 5, pi. 4. 



