THE SWEETLAND CREEK BEDS 67 



basin they must have been removed by erosion previous to the 

 deposition of the Coal Measures. Their next appearance is in 

 Schmidt's run, about a mile east from the railroad station at 

 Fairport. Just north of the wagon road under the bluffs they 

 may be seen in the left bank of the run. There are several out- 

 crops farther up, and the following section was made out, uncon- 

 formably overlaid by the Coal Measures. 



Number Feet 



4. Dark, almost black shale, with green seams from one to four inches 



thick, near which the darker shade exhibits a net work of fila- 

 mentous extensions of green clay ------ 7 



3. Greenish light colored shale -3% 



2. Greenish stony and hard shale - % 



1 . Greenish gray soft shale - - - - - - - I % 



Just west of the railroad station at Fairport, where a wagon 

 road follows a ravine up the bluff, this ravine exposes the fol- 

 lowing section. 



Number Feet 



7. Coal Measures resting unconformably on the numbers below. 



6. Weathered shale of alternate light and dark layers - - 5 



5. Dark gray shale ---------- 5 



4. Grayish-green shale with two bands of darker shale in part per- 



forated by coarse curving filaments or cylinders of green shale 3 



3. Concealed - - - - - - - - - - - 2 ? 



2. Dark gray shale with curving cord-like cylinders of green shale 



about Ye inch in diameter ------- 3 



1. Greenish argillaceous dolomite in layers about 6 inches in thickness 1 



In a small ravine which comes down from the west side of 

 Wyoming Hill there is seen under and north of the wagon bridge 

 about eight feet of gray and green shale with some stony layers. 

 The Cedar Valley limestone comes out in the river bank just 

 below and the Coal Measures overlie the exposure, rising about 

 100 feet above it. 



Along Sweetland Creek the relation of these beds to the 

 formations above and below them is better exhibited than at any 

 other place in the county. About one-third of a mile north 

 from the river bank they come out into view on both sides of 



