7u 



Report of the State Geologist. 



with greenish, sandy shales which, with occasional flags, continue to a height 

 of fifty-five feet. The black shales are so dark that they resemble in many 

 places the more bituminous beds of the Genesee, though the rock is more 

 arenaceous than is usual in that formation. The whole series is almost 

 devoid of fossils, only a single species of Lingtda, sp. indet, one of a small 

 AmbocceMa and an occasional Khodea having been seen. These are undoubt- 

 edly a part of the lower Portage beds. 



VII 1 . Truxton : hill at the west end of the village. For a distance of 

 100 feet above the base the shaly beds of Station VII are exposed; at 300 feet 

 above this is a slightly worked exposure of ten feet of thin sandstones with 

 softish interbedded shales. No fossils. Loose blocks on the hill sides indicate 

 the presence, in the section, of Lriorhynchus mesacostalis. 



VII 2 . Tripoli brook, three-fourths of a mile northwest of the village of 

 Cuyler, Cortland county, affords an exposure of upper Hamilton shales, 

 ending abruptly in the Tully limestones, producing falls forty feet in height. 

 The limestone begins at the bottom with a thin six-inch band, followed by 

 interbedded shales and thin limestones. The lower portion from the first 

 limestone layer to the beginning of the compact limestone bed is eleven feet, 

 the upper and more solid bed measuring six feet. It is interesting to observe 

 that at the base of the falls, twenty feet below the impure beds, is a limestone 

 layer, of the same lithological character as that at the top of the falls. This 

 is highly fossiliferous as are also the upper and six-foot layer, and both 

 appear to embrace the same fauna. The shale beds separating the lower 

 limestone stratum from those above contain species of the Hamilton fauna. 



Above the Tully limestone are Genesee black shales without fossils. The 

 exposure is largely covered, but does not exceed, in total, ten feet. Over 

 them lie dark olive sandy shales and fucoidal flags of the lower Portage group. 



On the east of Cuyler village, is a orook along the highway entering 

 from the east, where Hamilton shales are exposed at the foot of the 

 smith hill, the Tully and Portage terraces being well defined on the hill side, 

 though no exposures are seen. From the brook level to the Tully terrace 

 is about seventy-five feet. 



At Midler's brook, two and one-half miles east of Truxton, the Tully 

 limestone outcrops not far from the Cuyler road. The same rock appears one 

 and one-half miles south of Truxton on the Goddard farm, west side of the 

 Tioughnioga river; and also at the opening of the Cheningo creek into the 

 Latter valley, it is seen on the north side of the Cheningo valley in a small run 

 on the farm of Otis "Wicks, the exposure not exceeding one foot six inches. 



