REPORT OF THE STATE PALEONTOLOGIST 1902 1015 



stones are frequent, and some of the shaly layers are quite 

 sandy. A few of the sandstones are a foot or more thick and 

 hard. 



The Portage sandstones are exposed in the upper part of the 

 ravine to the brow of the hill. Some of the layers are compact 

 and heavy and have the same appearance as in the Genesee 

 river section, but most of the bed is softer and laminated, and 

 some parts are quite shaly. The thickness seems to be but 

 about 75 feet, but the lower limit is not well defined. 



The bed of soft olive and black shales that succeeds the 

 Portage sandstones is exposed above the crest of the hill in a 

 short shallow gully. 



The Gardeau beds and the sandstones are also exposed in a 

 similar ravine, 2 miles farther north, where the sandstones have 

 been quarried for railroad purposes. 



On the east branch of Tonawanda creek about 1% miles 

 above the forks and 5 miles south of Varysburg, a layer of 

 calcareous sandstone outcrops in the bed of the stream for a 

 few rods, and the same stratum appears in a small quarry 

 14 mile northeast. It contains great numbers of small frag- 

 ments of brachiopods, nearly all of which are too minute to 

 allow identification of the species. 



It bears a very close resemblance to the Long Beards riffs 

 fossiliferous layer; it is the lowest horizon in which brachio- 

 pods were found in this section; as it is at the proper altitude, 

 it is doubtless the same stratum, or, at least, in very nearly 

 the same horizon. 



On the south side of the Erie railway bridge at Griswold, 

 6 miles west of Attica, the Styliola limestone is exposed in the 

 bed of Murder creek. It is 18 feet above the top of the Hamil- 

 ton beds as exposed in the east bank of the stream 50 rods 

 north of the depot, and is overlain by 13 feet of typical upper 

 Genesee shales, above which are the black Middlesex shales. 



A long flat exposure of the Cashaqua shales is in the bed 

 and sides of the stream to the falls; including 5 feet of alternat- 

 ing light and dark layers at the bottom and 12 feet of the same 

 character at the top, they are 77 feet thick here. 



