or WEST ViRGimA. 



27 



very good condition. At another exposure, in a ravine on Mr. Williams' property, 

 five miles north from Morgantown, specimens of nearly all the species named above 

 can be obtained, in excellent preservation. It is a little curious that not a single 

 specimen of Clionetes mesoloba occurs in any stratum here, its place being taken by 

 a small variety of C. granulifera. The Productus semi-reticulatus of this region is 

 very closely allied to P. costatus, and I am inclined to regard it as identical with the 

 American variety of the latter species. For the most part the specimens of the spe- 

 cies above given are much smaller than similar specimens from the west, and some 

 are almost dwarfed. Mr. F. B. Meek described four new species of shells from this 

 series in Report of the Regents of W. Virginia University for 1870. 



LOWER GROUP. [ALLEGHANY RIVER SERIES.] 



The section is as follows : 



1. Sandstone, "Mahoning," 75 feet. ) t i- ^ i or- n j. 



2. Shale, 12 " [ Interval rocks 8 < feet. 



3. Coal, 11 " 



4. Shales, 1-25 " Interval rocks 1—25 feet, 



5. Coal, 4—5 " 



6. Shale, 10 " Interval rocks 10 feet. 



7. Coal. 1 " 



8. Sandstone, 5 " 1 



iS: Limestone. "Ferriferous," 4-^5 " [ Interval rocks 50 feet. 



11. Shale, 30 " J 



12. Coal, 3i " (?) 



13. Sandstone and Shale, 20-30 " Interval rocks 20—30 feet. 



14. Coal, 2—3 " 



15. Shale, 15-20 " ) 



16. Sandstone, "Tionesta," 25-30 " Wnterval rocks 65— 75 feet. 



17. Shale, 25 " ) 



18. Coal, 1^ " 



19. Sandstone, 4 " Interval rocks 4 feet. 



20. Coal. 1 " 



21. Shale. 10 " 



MaJwning Sandstone. For the most part this is a massive rock, with alternating- 

 coarse and fine layers. The former are sometimes conglomerate, and the soft laj^ers 

 above them are pitted on the other side, so as to appear covered with rain markings. 

 In some portions it is flaggy, while in others it is compact and very suitable for 

 building purposes, as blocks six to eight feet thick can be quarried without diifi- 

 culty. Rude vegetable impressions are not unfrequent, but are invariably too indis- 

 tinct for identification. This stratum comes down to the level of Decker's creek 

 about four miles from Morgantown. The dip at that point is so diminished as to be 

 almost imperceptible, but is soon reversed and becomes sHghtly southeast. At the 

 mouth of Decker's creek about forty feet are visible. Here it regains its north- 

 westerly dip and disaj)pears under the river near Granville, two miles below Mor- 

 gantown. To the south it rises quite rapidly, nnd at Broth's creek, four miles south 



