62 NEW YORK STATE MUSEUM 



of the State. This band appears in the quarries at Portageville 

 and also at Rock Glen, and may serve as a datum by which to 

 determine the place, in the series, of the more valuable quarry stone 

 layers. It may be seen on Quarry hill at Nunda at the reservoir. 

 A thinner layer of the same character appears high up in the 

 quarry wall here, but it thins out toward the west and is scarcely 

 noticeable in the river gorge. The nodules are common also in 

 rhe 2 feet of shale near the bottom of the formation at Portage- 

 ville. 



Next to that of the gorge section and the quarries mentioned 

 the best exposure of the Nunda sandstone on these quadrangles 

 is on Quarry hill i mile south of Nunda and along the road to 

 Dalton. It crops out occasionally on the hill east of Nunda along 

 the wall to Byersville and in small ravines and is well displayed in 

 Wildcat gully in the northeast corner of the town. 



It is exposed along Wolf creek below Castile and for a mile 

 west of the Erie Railroad along Relyea creek and Stony creek near 

 Warsaw. 



Lignitic plant remains are common in the sandstones, sometimes 

 in sufficient quantity as to form thin coaly seams of small extent. 

 The lignites are usually fragmentary and rarely well enough pre- 

 served to allow identification of species. 



Manticoceras oxy Clarke, M . r h y n c h o s t o m a 

 Clarke, Aulopora, Orbiculoidea sp. Crinoid stems, F u c o i d e s 

 V e r t i c a 1 i s and a few small representatives of the Gardeau 

 fauna, constitute the fauna of this formation in the river section, 

 but in the eastern part of the Nunda quadrangle thin seams of the 

 comminuted shells of brachiopods occur and in the Naples valley 

 these rocks contain a well developed Chemung fauna. 



The Nunda sandstones are prominent in the stratigraphy of 

 western New York from Chemung county to Lake Erie. The 

 formation, while retaining its character as a mass of homogeneous 

 barren sandstones, thins out rapidly west of Wyoming county and 

 on the shores of Lake Erie south of Portland harbor where it dips 

 under the water it is but a few feet thick. 



Toward the east it becomes gradually less homogeneous and more 

 assimilated to the adjacent formations, but may be traced in numer- 

 ous outcrops as far east as Chemung county. In the vicinity of 

 Naples these sandstones contain calcareous masses of fossils, mostly 

 belonging to the fauna of the Chemung rocks. One of these out- 

 cropping in High point, a rock bluff 3 miles west of the village, 



