80 



Report of the State Geologist. 



Cyrtina Hamiltonensis. 

 A mbocodia umbonata. 



Orthis, sp. ? a moderately large form of Dahnanella. 

 Lunalicardium cf. ornatum. 

 J fa /> t ieo< 'eras Pater soni. 



Station XVII. Plum creek, running east and west through the village 

 of Himrods, Yates county, and entering Seneca lake, makes a ravine through 

 the lower Portage and upper Genesee beds. At the lake (elevation 447 feet 

 A. T.) are the bituminous beds of the Genesee above the Styliola layer, whose 

 position in this formation is just about at the lake level. The height of the 

 Genesee slate in the sides of the ravine is 150 feet, and the beds near the 

 top bear its characteristic fossils, e. a., 



ScJt izobolus truneatus. 



Orbiculo idea Lodens is. 



Chonetes scitula. 



I/iorhyrwIi us quadrieostatus. 



Nuoula corb uliforrn is. 



Phihonia lirata. 



PI e u roto in aria rugul ata. 



Styl iolina Jiss urella. 



The Portage beds come in with a gradual change from black to greenish 

 shales, followed by flags and thick sandstones. At 170 feet occur 

 L u nulieardiu m fragile. 

 JBuchiola speciosa. 

 Cardiola Doris. 

 Bactrites cf . gracilis. 

 Pi-ohirl <x 'eras L a theri. 

 r /(>r/if>ce/-<(s ti niangidare. 



Beneath sandy layers similar to those described at Station XVI occ ur 

 shales with Budhiola speciosa at the Northern Central railroad cut, two miles 

 Southeast of Penn Yan ; and again, in close connexion with such beds, one and 

 a half miles south of Penn Yan, on the road to Branchport, are sandy shales 

 bearing Lv/n/ulicardium fragile, sixty feet above Keuka lake (elevation 718 

 feet A. T.). 



Station X ( '///. Belknap's gully, two miles north of Branchport, Yates 

 county. Elevation of mouth of ravine not more than fifty feet above Keuk;i 

 lake. A carefull) measured section of the exposures here has been given by 

 Mr. I). I). Luther in the Thirteenth Annua] Report of the State Geologist 



