UPPER CHEMUNG ROCKS. G 5 . 73 



Mauch Chun k, XI, and Pocono, X, together, 818' 



Catskill, IX, ... 1122' 



From base of XII down to top of VIII in Tioga county, . 1940' 

 " " " " in Wayne county, 2740' 



Amount of thinning westward, 800' 



Bate of thinning westward* 10' per mile. 



Chapter VIII. 



The Upper Chemung rocks. 

 These come to the surface no where in Wayne, and only 

 along the State line belt in Susquehanna county. They are 

 well exposed at the Falls of Cascade Creek in Harmony 

 township, 2 miles N. E. of the mouth of Starucca Creek. 

 The overlying lower Catskill measures are exposed near 

 the mouth of Starucca Creek. The combined section is as 

 follows: (See Fig. 10.) 



CatsJclll. 



New Mil ford 

 k red shale > . . . . 115' 



interval. 



1. New Milford lower sandstone, 25' 



2. concealed, . . 65' ^ 



3. Sandstone, gray, 5' 



4. Shale, 5' 



5. Sandstone, ... 4' 



6. Shales, sandy, gray, ... 6' 



7. Sandstone, greenish-gray, 30' ) 



8. Shales, olive, Starrucca, 105' 



245' 



Chemung. 



9. Shale, olive, with Chemung fossils, 20' 



10. Sandstone, olive, 3' 



11. Conglomerate with flat pebbles, 1' 



12. Sandstone, olive, * 4' 



13. Shale, olive, 8' 



14. Sandstone, olive, ... 4' 



15. Shale, olive ; iron ore near middle, 40' 1 



16. Shale, brick-red, 10' 



17. Sandstone, shalv, green, .... 5' 



( unnpr (rrppni«h i > Mansfield reds, 90' 



18. Shale, soft, , upper ' greemsh ' 20 j 



I lower, dark, purple, ) 



19. Shale, olive, spirifer bed, fish ? . . 15' ! 



* Suppose this rate to be maintained still further, to Titusville, 140 miles 

 west of Blossburg, the XII-VIII interval ought to be reduced at Titusville to 

 (1940'— 1400') 540' which approximates closely to observed facts. 



