PROSSER THE GENESEE SECTION. 



59 



NO. OF 

 SAMPLE. DEPTH. 



DESCRIPTION OF 

 SAMPLE. 



24. 



464'. Mainly gray, finely arenaceous shale (?), 



with a few bluish and brownish-red 



arenaceous chips. 

 Mainly olive to grayish, argillaceous 



shale, a few brownish-red chips. 

 Olive to grayish, argillaceous shale. 

 Mainly light gray, fine grained, micaceous 



sandstone (?). 

 Greenish-gray, argillaceous shales. 

 Ditto. 



Bluish, argillaceous shale and light gray, 



fine grained sandstone (.-'). 

 Ditto. 



Clear olive, argillaceous shale. 

 Fine chips of light gray, fine grained 



sandstone. 

 34 (?). 657'. Bluish, argillaceous shale. 



35. 676'. Light-gray, fine grained sandstone mixed 

 with blue shale. 

 696'. Ditto. 

 715'. Ditto. 

 (Wanting.) 

 759'. Ditto. 



770'. Ditto, only rather more of the bluish, 

 somewhat arenaceous chips, (ist sand 

 of Mr. Hatch.) 



792'. Mostly bluish, finely arenaceous shale (?). 

 812'. Light gray sandstone, mixed with bluish 

 chips. 



43. 830'. Olive, argillaceous shale mixed with red, 



oolitic iron ore. (') 



44. 846'. Olive to bluish, argillaceous shale. 



45. (Wanting.) 



36 

 37 

 38 



39 



40 



41 

 42 



THICKNESS 

 OF STRATA. 



97' grayish 

 shale (?). 

 19' sand- 

 stone (?). 



39' shales. 



38' blue shale 



and 



sandstone (?). 



2o'oliveshale. 



19' gray 



sandstone. 



19' bluish 



shale. 



116' mainly 



gray 



sandstone. 



38' shale 



and 



sandstone (?). 



16' olive 



shale and red 



iron ore. 



(i.) Prof. Williams found oolitic red iron ore in an olive shale near Cuba, Allegany Co. (Bull. 

 U. S. Geol. Surv., No. 41, pp. 67, 69.) The Cuba locality is about nine miles north of this well 

 with an approximate altitude of 1700'. If we call the dip 25' per mile for the nine miles, then the 

 position of the iron ore in well gi ought to be at about 1475' A. T. Calling the altitude of the mouth 

 of the well 2300', then the iron ore actually found in the well is at an altitude of 1470' A. T. 



