I.I.IAMS AND 
KINDLE. 
HOLLOWING RUN SECTION. 87 
the correctness of this correlation. It was desired also to compare the 
vertical range of the species occurring in it with those of the Cata- 
wissa and other sections, to ascertain the variation of the faunas, and 
to learn whether any new faunal province appeared in that direction. 
For 10 miles or more below Selinsgrove the Susquehanna River cuts 
across the folds of the Paleozoic rocks, approximately at right angles 
to the strike. A very good section is exposed on the east bank of the 
river, between the mouth of Hollowing Run and Selinsgrove Junction, 
extending down to the Salina. The beds dip to the south at from 35° 
to 45°. The strike is S. 70° W. magnetic. 
Only the upper Devonian part of this section was studied by the 
writer. Beginning with the lowest beds studied, the section exposed 
along the railway is as follows: 
Section 1454 A, at HollovAng Run, Pa. 
Ft. in. 
29. Tough olive sandy shale with few fossils .. _ 20 
28. Tough olive sandy shale with fossils 10 
27. Hard olive to grayish sandy beds, apparently barren 70 
26. Hard olive-grayish sandy beds with fossils 10 
25. Shaly dark olive sandy beds with occasional bands of crinoid stems and 
Stictopora 1 70 
24. Olive-gray sandy shale 5 
23. Dark olive sandy beds 65 
22. Band of Stictopora 2 
21. Dark olive sandy beds 100 
20. Hard olive-gray sandy beds with fossils 10 
19. Hard olive-gray sandy beds 90 
18. Bed of closely crowded shells 4 
17. Bluish-gray hard sandy beds, weathering brownish, with occasional 
fossils 125 
16. Bluish-gray shaly sandy beds with lamellibranch fauna 5 
15. Dark gray sandy shales 50 
14. Dark gray shaly sandstone, weathering splintery 10 
13. Dark bluish sandy shale and thin-bedded sandstone, apparently barren. 200 
12. Same as above, but containing a few fossils 20 
11. Dark bluish somewhat sandy shale 30 
10. Dark bluish-gray shales with some hard intercalated sandy beds 110 
9. Covered 285 paces, estimated thickness 400 
8. Bluish-gray shale 5 
7. Covered 18 
6. Dark fossi tiferous shale 5 
5. Dark somewhat sandy shale v 220 
4. Covered for 40 paces, estimated thickness 75 
3. Dark sandy shales with ferruginous concretions 90 
2. Dark sandy shales 15 
1 . Dark sandy shale and yellow sandstone 35 
1,963 6 
