REPORT OF THE STATE PALEONTOLOGIST 1902 1019 



Stations "between the Tonaivanda valley and the shore of Lake 



Erie 



31 Along Murder creek at Griswold station. Exposed: upper 



Hamilton, Genesee shales, the Styliola limestone, the 

 Middlesex shales, the Cashaqua shales and the Rhine- 

 street shales. 



32 Along Cayuga creek at Iron Bridge Mills. The Styliola 



limestone, Upper Genesee shales and the Middlesex shales 

 of the Portage group. 



33 Along Cayuga creek at Cowlesville. The Cashaqua shales. 



34 Along Cayuga creek at Folsomdale. The Rhinestreet 



shales. 



35 Along Big Buffalo creek at Porterville and East Elma. 



Rhinestreet shales and the Cashaqua shales. 



36 Ravine at Johnsons Falls, 2 miles north of Strykersville. 



Gardeau to base of Portage sandstones. 



37 Ravine at Java Village. Top of the Portage sandstones 



and the Wiscoy shales to Long Beards riffs sandstone. 



38 Ravine east of, and along the railroad north of Holland. 



Portage sandstones and Wiscoy shales. 

 40 Ravine 1 mile south of West Falls. Gardeau beds. 



Lake Erie section 



The exposure of Portage strata on the shore of Lake Erie 

 begins in the cliffs on the south side of the mouth of Eighteen 

 Mile creek in the town of Evans, Erie co. and, through broken 

 by many short stretches of sandy or gravelly beach, is almost 

 continuous for 45 miles to the northwest corner of the town 

 of Westfield, Chautauqua co. 8 miles from the Pennsylvania 

 line. 



But three of the subdivisions that can be made in the Portage 

 formation in the Genesee river section can be identified here 

 by the character of the sedimentation. 



The Middlesex, the Cashaqua and the Rhinestreet shale are 

 much alike in both sections except as to thickness, but above 

 them there is in the lake section a thick mass of shales, light 

 colored and more or less calcareous at places, black and bitu- 



