WARREN COUNTY. 291 



FEET. IN. 



19. Fireclay 2 3 



20. Black slate 3 6 



21. Bituminous shale 4 



22. Fire clay ? 



In No. 9 of this section, there are some valuable quarries. The rock is 

 from six to seven feet thick at some of the localities, and the whole of it is 

 thick bedded, so that blocks of any desirable size can be had. There are, how- 

 ever, large concretions of a calcareo-arenaceous rock, locally called " flint," in 

 the sandstones. One of these was taken from the quarry of Mr. J. Worden, 

 section 14, that was about two and one-half feet thick, six to seven wide, and 

 from ten to twelve long. This rock is very compact, hard enough to scratch 

 glass, and in chloro-hydric acid effervesces slightly. It is not considered of any 

 value, and is so hard that when it occurs in large masses it is very expensive 

 getting it out of the way. At other localities, this sandstone is replaced by 

 arenaceous shale. 



No. 13 of the section is locally called " water flint," and is easily recognized, 

 whenever met with in this vicinity, by the numerous specimens of Stigmaria 

 ficoides present in it. These have much the appearance of dark brown or black 

 roots, and in some cases the rock seems full of them. This rock is a somewhat 

 argillaceous sandstone, compact, and not usually as hard as No. 9. 



No. 15 may possibly be the representative of coal No. 1, but this seems 

 doubtful. 



In the northeast quarter of section 23, the strata appear to have been con- 

 siderably disturbed, and at one place are tilted, for a short distance, to an angle 

 of about 5. Not far from here, two faults are to be seen within a few yards 

 of each other.* 



For some distance up the creek, northwest, the strata appear to have been 

 somewhat disturbed, and dip in all directions. In sections 26 and 22, mines 

 have been opened and more or less work done. In section 16, the following 

 sections were obtained at points but a few rods apart : 



No. 1. No. 2. 



FEET. IN. FEET. IN. 



1. Coal ? 1 6 



2. Fire clay 8 



3. Coal 3 



4. Arenaceous shale 2 



5. Light colored clay shale 1 8 8 



6. Dark blue clay shale 4 11 



*This appearance has probably been occasioned by the undermining of the strata in the 

 erosion of the creek valley, and their subsequent displacement by being crushed downwards 

 from the weight of the superincumbent beds. A. H. W. 



