180 GEOLOGY OF THE I<rAREAGANSBTT BASIN. 



from South Attleboro to Hebronville. These beds probably represent the 

 horii^jon of the Seekonk group on the north side of the Perrins antichne. 



BLAKE HILL FAULT BLOCK. 



The gray Carboniferous strata west of Plainville in Blake Hill exhibit 

 several small monoclinal ridges of hard sandstone and quai'tzose conglom- 

 erate with interbedded shales, here and there containing casts of calamites 

 and rarely other members of the Carboniferous flora. The most prominent 

 of these ridges has received the name of '^Goat Rock." A detailed meas- 

 urement of the strata exposed in this bluff above the talus has been made 

 bv Mr. F. C. Schrader, to illustrate the character of the barren beds in this 



Section of Goat Rock Cliff, 



I'eet. Inches. 



Gray sandstone (at top) 9 



OoBglomerate, gray, coarse, witli irregular partings of black slate about 



2 feet from base 12 



Shale, dark and slaty S,5 



Sandstone, gray, varying to a pebbly grit 1 4 



Shale, dark and slaty 2 



Sandstone, gray, with a few small pebbles in middle of the layer 11. 5 



Grit, fine, pebbly 3. 5 



Sandstone, grading downward from above 4 



Sandstone, hard, fine grained 5. 5 



Shale, slaty, with plant stems 1 lO 



Sandstone, very fine grained 1 l, 5 



Shale,slatiy .^ 2 



Grit, gray and finely conglomeratic .* 11. 50 



Shale, dark slaty , , 11 



Sandstone and grit . . , g. 50 



Conglomerate, gray, gritty, and grading upward into next above 7 



Sandstone, gray 2. 5 



ShalC; slaty- . - - 7. 5 



Sandstone, bluish gray 11 



Shale, black and slaty, with plant stems 3 



Conglomerate, fine, gray, and gritty 1 8 



Shale, dark and slaty, a mere layer. . - .2 



Sandstone, gray , 5 



Shale, dark, slaty - - . . , .2 



Sandstone, gv^j _ . ^5 



