RBrORT OF THE STATE TALEONTOLOGIST 1901 623 



sides of the cascade but nowhere else in the valley at this 

 horizon. This layer is 600 feet above the Genesee shale. 



The Grimes sandstones come in in full force 4 feet above this 

 layer and are well exposed in the floor and sides of the canyon 

 above the falls, but appear to be barren of fossils. They are ex- 

 posed in a similar manner at the top of the High falls in the 

 Tannery gully. No fossils are found here at the base of the sand- 

 stones but near the middle of the beds an extensive lenticular 

 layer a foot thick is composed principall}' of crinoidal segments 

 and comminuted brachiopods and shows a few specimens of 

 Liorhynchus, Atrypa, Productella, A m b o c o e 1 i a u m b o - 

 n a t a and a small Chonetes in a recognizable condition. 



This calcareous lentil extends 60 to 80 rods toward the north 

 and outcrops slightly in the fields on the north side of the road 

 leading up Hatch hill. A few feet higher occur species of the 

 dictyosponge Hydnoceras with P a r o j) s o n e m a crypto- 

 p h y a , a large Orbiculoidea and other problematic organisms 

 not elsewhere seen. A Leptodesma of notable size and not seen 

 in the beds below occurs in the lower part of the Grimes sand- 

 stones in the small Smith ravine south of the Tannery gully and 

 also in a field outcrop in Nellis's pasture H miles northeast of 

 the village. The same fossil appears on the surface of a thin 

 sandstone about 50 feet above the Grimes sandstones in the 

 Lincoln gully on the opposite side of the valley. Sponges, 

 crinoids and a few brachiopods have been found in these sand- 

 stones at several other outcrops in the valley. 



The Grimes sandstones are .succeeded by shale, flags and thin 

 sandstones in varying proportions for about 600 feet to the base 

 of the High Point sandstones. Very few of the harder layers 

 reach a foot in thickness and no distinctly sandy band is of suf- 

 ficient magnitude to assist or confuse in the determination of 

 horizons. No layers have been found to be continuously fossilif- 

 erous, but many of the sandstones and a few of the shaly beds 

 contain fossils quite abundantly for a short distance. 



Of the fossils observed in the strata between the Grimes sand- 

 stone and the High Point sandstone the following are note- 

 worthy. 



