328 J. H. BRADLEY, JR. 



SIMILARITY or PHILIP SBURG AND EAST SHOREHAM SECTION 



Brainerd and Seely divided the Beekmantown rocks exposed 

 at East Shoreham, Vermont as follows:* 



DIVISION E 



Fine-grained magnesian limestone in beds one or two feet in thickness, 

 weathering drab, yellowish or brown. Occasionally pure Kmestone layers 

 occur, which are fossUiierous, and rarely thin layers of slate. 

 Thickness 470 ft. 



DIVISION D 



4. Blue limestone in thin beds, separated from each other by very thin 

 tough slaty layers, whose weathered edges protrude in vmdulating lines. The 

 limestone often appears to be a conglomerate, the small enclosed pebbles 

 being somewhat angular and arenaceous. (100 ft.) 



3. Sandy limestone in thin beds, weathering on the edges in horizontal 

 ridges one or two inches apart, giving to the escarpments a peculiar banded 

 appearance. A few thin beds of limestone are interstratified with the siliceous 

 limestone. (120 ft.) 



2. Drab and brown magnesian limestone, containing several beds of tough 

 limestone toward the middle. (75 ft.) 



1. Blue Umestone in beds one to two feet thick, breaking with a flinty 

 fracture; often with considerable dolomitic matter intermixed, giving the 

 weathered surface a rough, curdled appearance; becoming more and more 

 interstratified with calciferous sandstone in thin layers, which frequently 

 weather to a friable ochreous rotten-stone. (80 ft.) 



Thickness 375 ft. 



DIVISION c 



4. Magnesian limestone like No. 2, frequently containing patches of black 

 chert (120 ft.) 



3. Sandstones, sometimes pure and firm, but usually calciferous or dolo- 

 mitic (70 ft.) 



2. Magnesian hmestone in thick beds, weathering drab. (100 ft.) 



I. Grey, thin-bedded, fine-grained, calciferous sandstone, on the edges 

 often weathering in fine lines, forty or fifty to the inch, and resembling close- 

 grained wood. Weathered fragments are frequently riddled with small holes, 

 called Scolithus minutus by Mr. Wing. (60 ft.) 



Thickness 350 ft. 



DIVISION B 



Dove colored limestone, intermingled with fight grey dolomite, in massive 

 beds; in some places for a thickness of twelve or fifteen feet no planes of 

 ^ Brainerd and Seely, Bidl. Am. Mus. Nat. Hist., Vol. Ill, 1890-91. 



