932 GEOLOGY OF OHIO. 



where it has been used. It seems to be the same seam that is known in 

 this part of the district as the " Little Yellow Kidney." If not iden- 

 tical with it, both b-long very near together. 



The ledge of sandstone that comes next in the section is a marked 

 and characteristic element in the geology of the region. It is a Con- 

 glomerate, the first well defined rock of this kind that has been found 

 in the three or four hundred feet of strata that are now being reviewed. 

 It contains quartz pebbles, for the most part, but occasionally coarse 

 pebbles of non- fossil iferous limestone and of Coal Measure sandstones oc- 

 cupy the series for several feet of thickness. This phase is well shown at 

 Buzzard's Roost, on the old road leading from Iron ton to Hecla Furnace. 

 The limestone pebbles seem to be derived from the Buff Limestone last 

 named. This Conglomerate stratum is found to be an excellent and reliable 

 guide throughout the southern and eastern portions of Lawrence county. 



At about one hundred feet above Coal No. VI another coal seam is 

 shown in this same hill. The measurement was not in this instance, 

 however, direct, and the distance may be somewhat less than has been 

 given. The coal is worked on the furnace lands. It is four feet thick 

 and of fair quality. 



A barren reach of eighty-seven feet — mainly sandstone, intervenes be- 

 tween this coal seam and the Cambridge Limestone. This well marked 

 stratum is frequently found in two courses from one to twenty feet apart. 

 It seems to be so divided here. At one hundred and sixty-seven iee% 

 the lower stratum seems to be met. Seventeen feet higher the main 

 layer is foui.d, at a height of one hundred and eighty-four feet above 

 the Sheridan coal. This limestone completes the section. 



On comparing this section with the one measured in the Hocking 

 Valley — page 926, a remarkable agreement will be observed. The bound- 

 aries of the Meeker's Run and Monitor Furnace sections are certainly 

 the Fame. Both the coal and the limestone that constitute these bound- 

 aries have been^followed from township to township, through the whole 

 district^ until the identity of each throughout its various exposures has 

 been completely established. The interval in the first section between 

 these two horizons is ©ne hundred and seventy feet; in the second, it is 

 one hundred and eighty-four feet. But it was remarked that the interval 

 in the Meeker's Run section was ten or fifteen feet shorter than the 

 usual interval. In other words the usual interval between these horizons 

 in the Hoc-king Valley is exactly the same that we find in the Ohio 

 Valley. This agreement is certainly surprising. As has been already 

 remarked fuch identity of measure in sections sp remote from each other 

 would constitute proof of difference rather than of equality of age, but 

 here we are obliged to believe that the same number of feet of strati- 



