72 G 5 . REPORT OF PROGRESS. I. C. WHITE. 



a considerable part of Bradford county lying east of the 

 Susquehanna river ought to be colored CatsJcill where the 

 map colors it Chemung. 



3. Before commencing my survey I studied the Bloss- 

 burg section from XII down to VIII along the Tioga river, 

 and give it here for comparison with all that has been said 

 above (See Fig. 9.) 



1. Bottom conglomerate of XII, 60' 



2. Concealed (with red shales and gray sands,) XI, . . 245' 



3. Sandstone, buff, massive, .... ... 20' 



4. Concealed, (dip 6° to 8° for one mile,) say 500' 



5. Sandstone, gray, 25' ) 9R 



6. Calcareous breccia, 3' ) 



7. Sandstone, gray, (Sherwood's base of X,) 25' 



8. Shale, red, &c.,' (Sherwood's top of IX.) 35' 



9. Sandstone, current-bedded, grayish green, 15' 



10. Shales, .... 5' 



11. Sandstone, current-bedded, thin layers, 40' 



12. Concealed, (probably shale,) 250' 



13. Sandstone, finely laminated, greenish gray, 30' 



14. Concealed, 50' 



.15. Sandstene, current-bedded, greenish gray, 20' 



16. Concealed, 350' 



17. Red shale and sandstone, . 35' 



18. Fish Conglomerate, 2' 



19. Red shale and sandstone, visible 200' 



20. Concealed to top of Chemung, .... possibly only 100' 



Total,* 2000' 



* This total is larger than that heretofore reported from the Tioga river. My 

 measurements may be thus explained : Nos. 2 and 3 were directly measured 

 across the beds. 



From top of No. 4 at Blossburg to top of No. 5, near mouth of East creek, 

 N. 30°, W. about 1 mile ; rise nowhere less than 6°, often 8° ; therefore 500' 

 is rather under than over the mark. 



Messrs. Evans (quoted in H. G. Rogers' Geol. Pa., II, 520,) measured Um- 

 bral (XI) 238'+ Vespertine (X) 150=388'. This is 430' less than my 818'. 



Nos. 5, 6, 7 and 8 are well exposed just opposite the mouth of East creek. 

 Here the bottom of the Evans (Rogers') section, "30' to 35' red shale," is the 

 same as my No. 8. 



Nos. 9 to 20 were got by carefully following the steep rise of No. 8 north- 

 ward, along the mountain side opposite Red Rock, and then making an al- 

 most vertical barometric leveling down to the noted Holoptychius bed (No. 

 18) on the railroad below. 



No. 20 may be thicker than 100', which would make the whole red shale 

 (Nos. 19-20) 300'. Hall's N. Y. Fourth District report (1844) recites "400' " 

 of red rocks in the Cattskill near Blossburg. 



