380 



J. 8. Diller — Bragdon Formation. 



half a mile above the mouth of Middle Salt Creek ; in both 

 cases upon the left bank of the river, and sandstone cobbles 

 predominate. They are thoroughly waterworn, round and 

 smooth, attaining at the first locality a maximum diameter of 

 two feet although they are generally not over six inches. 

 Limestone cobbles are less abundant, somewhat smaller and 



Jurassic 



Bully BED vole anics Mc Cloud limestone 

 andBaird. Carboniferous 



Bragdon. Carboniferous Kennet.Devonian Clear Creek vole anics 



Scale of map, 1 inch = nearly 7 nriles. 



often fossiliferous, while pebbles and coarse sand chiefly of 

 vein quartz and chert form the matrix between the larger 

 fragments as well as the beds of finer conglomerate. Away 

 from the river, coarse conglomerate is rare. It was noted on 

 the divide, about one and one-fourth miles southwest of High 

 Mountain, called also Nawtawakit Mountain, close to the eastern 

 edge of the Bragdon, where the pebbles of gray sandstone 

 weathering red are sometimes six inches in diameter and very 

 hard. 



Distribution. — The principal area of the Bragdon, and the 

 one to which, excepting the western border, I have given 

 special attention, is what Mr. Hershey calls the " eastern or 



