774 GEOLOGY OF OHIO. 



Mr. Ferguson's opening, near Unionport, the main coal is from four feet 

 two inches to four feet nine inches thick, roofed by one foot of clay shale, 

 no roof coal being seen. The intimate structure of the bed is as follows : 



FT. IN. 



1. Coal 1 2 



2. Parting | 



3. Coal (J 



4. Parting i 



5. Coal 9| 



6. Parting H 



7. Coal 1 1 



8. Parting _. - ^ 



9. Coal 2 



The upper pyrites band is occasionally present at about ten inches from 

 the roof, but it is not persistent. Nodules of pyrites are very common, 

 and at times are very large. They are surrounded by soft coal and are 

 easily separated. The coal is said to be of very good quality for domestic 

 use. Southward, along the road to York, roof coal makes its appearance, 

 and is cove/red by nine or ten feet of shale on which rests a thin coal, 

 most probably Coal No. 9. At Mr. Voorhis's bank the main coal is five 

 feet six inches, and the roof coal, eight to twelve inches thick. At Mr. 

 Parker's opening the bed is — 



1. Roof coal 1 foot 6 incbes. 



2. Clay lOinches. 



3. Coal 5 feet 2 inches to 5 feet G inches. 



The coal is good but pyrites is apt to be troublesome, as nodules occur 

 five to eight inches in diameter. 



Underlying the coal there are no rocks of interest until we reach the 

 Crinoidal Limestone, which, in the northern portion of the township, 

 is seen about two hundred feet below Coal No. 8. It may be seen crop- 

 ping out at various localities along the railroad, but is best exposed, near 

 Unionport on the road leading north from that station. It is about five 

 feet thick, and contains great numbers of Lophophyllum proliferum, 

 Choiietes, Productu« longispinus and other species, all of them poorly pre- 

 served. From this locality two imperfect specimens of Petalodus were 

 obtained. On the same road the blossom of a thin coal was observed 

 two or three feet from the limestone. At several places along the rail- 

 road the blossoms of a very thin coal Avas seen, nearly three hundred 

 feet below Coal No. 8. Near Bloomfield Station, some borings were made 

 but no record was preserved. It is reported that two coals were cut, 

 eighty feet apart, the upper two and one-half feet and the lower four 

 feet thick. From their relations to each other, and to Coal No. 8 above, 

 it is most probable that these are Coals Nos. 6 and 7. 



Cross Creek Township. — In the greater portion of this township. Coal Mo. 



