374 COUNTY AND KEGIONAL GEOLOGY. 



Section at Lewis. 



No. 10. Yellowish, marly clay, with occasional thin calcareous 



layers 2 f ee t. 



No. 9. Grayish, compact limestone sg foot. 



No. 8. Marly clay 4 feet. 



No. 7. Fragmentary limestone, with flinty nodules 1% feet. 



No. 6. Grayish, compact limestone 2% feet. 



No. 5. Dark colored carbonaceous shale y 2 foot. 



No. 4. Dark colored, concretionary, and very flinty limestone . . 3 feet. 



No. 3. Yellowish, and bluish marly clays 10 feet. 



No. 2. Grayish limestone 1 foot. 



No. 1. Yellowish, marly clay 2 feet. 



Total... 27 feet. 



No. 1 was partially hidden beneath the water of the river, 

 and upon its shores numerous fragments of black, laminated, 

 carbonaceous shale were seen, doubtless derived from a bed 

 of that material in the bottom of the stream. 



There are frequent exposures of these strata of limestone 

 and shales in the valley-sides of the Mshnabotany, at 

 intervals, for three or four miles below Lewis. Going up 

 Turkey creek, northward from Lewis, three or four miles, 

 several exposures of limestone, marly clays, and shales were 

 observed, all of which are regarded as belonging within the 

 vertical range of the section at Lewis. 

 Fig. 40. 



....--- The following section was measured in 



..♦"*" the bank of a small creek called " Chap- 



man's branch," about a mile above Lewis- 

 3/^==-=—--^ t It is illustrated by Fig. 40. 



3 4 



Section at Chapman's Branch. 



2 £•-.-_- '— ^^^jF , „ 



No. 5. Yellowish, marly clay 2 feet. 



No. 4. Black carbonaceous shale ^ mot - 



No. 3. Clay, resembling fire clay % foot. 



No. 2. Bluish, compact limestone 1^ feet. 



No. 1. Black carbonaceous shale 2% feet. 



Total 7 feet. 



