204 



Thirty-fifth Eeport on the State Museum. 



an island in the outlet of Lake Keuka. This is called the " Sugar 

 Loaf." On the west and south sides of Sugar Loaf, which is about 

 sixty feet high, the rock is free from soil, and certain fossils maybe col- 

 lected there in abundance. The top is capped with the Tully limestone, 

 which projects several feet beyond the shales beneath. Frequent 

 calcareous layers about two inches thick occur here. These consist 

 wholly of fossil remains. The following are abundant at Sugar Loaf : 

 Athyris sp infer aides, Eaton; Atrypa reticularis, Linn.; Chcetetes 

 fruticosus, Hall ; Strombodes distorta, Hall ; JStreptelasma rectum, 

 Hall; Amplexus sp.9 Spirif er a granulif 'era, Hall; 8. medialis, Hall ? 

 and S. mucronota, Con. 



The finest exposition of this formation and a^so of the succeeding 

 Encrinal limestone, Ludlowville and Marcellus shales, is in Kashong 

 creek, in the town of Benton. Here all the fossils found elsewhere in 

 the county (below the Portage) occur, and many not found in other 

 localities. As the remaining formations of Yates county are best seen 

 in Kashong creek, we invite attention to that locality. 



Kashong Creek. 



> 



r 







z 



o 



& 



a 

 c 

 u 



Section along Kashong creek, from near Bellona to Seneca lake. Vertical scale, 124 ft. to 

 1 inch. Horizontal scale, h mile to 1 inch 



This creek has its source in the swampy lands in the western 

 part of the town of Benton and has, at two different periods, been the 

 channel through which the waters of Lake Keuka have reached Sen- 

 eca lake. By the map it will be seen that it has its origita in the Por- 

 tage group, and runs through all the lower formations in the county. 

 A few rods south of Bellona the Genesee slate and Tully limestone 

 appear near an old saw-mill. 



