REPORT OF THE STATE TALEOXTOLOGIST 1901 519 



Chili and lying about half the distance between these two 

 points, or 2 miles from Churchville. Here are exposed (station 

 9) the green shales of the basal Salina. The nearest outcrop 

 of the Lockport dolomite is about 1 mile north of this and 

 I mile to the east, being at station 6 on the first north-south 

 road east of the road from Xorth Chili to Spencerport. No 

 closer approach of the two formations could be observed, but 

 the topography of the region seems to clearly indicate the con- 

 tact of the limestone with the soft Salina shales above along an 

 approximate east and west line through this region. On 

 account of the drift mantle, the limestone outcrops do not make 

 a specially noteworthy feature of the topography. The extent 

 of the Salina in the vicinity of Churchville and south of North 

 Chili is indicated by outcrops recorded (station 8) just south 

 of Churchville village in drain excavations on the Riga road. 

 Also along the banks of Black creek at station 7, near the con- 

 fluence with a branch from the west, 1 mile south of Church- 

 ville, where are 15 feet of mottled red green and gray shales. 

 At station 1, 3 miles southeast of Churchville, 15 feet of green- 

 ish and gray shales are exposed on both sides of the creek and 

 extend in interrupted exposures as far as the road to Buckbee 

 Corners, crossing the creek. Thus it is evident that the region 

 north of Black creek to the last outcrop of the Lockport dolo- 

 mite, a distance of 3 miles, is covered by the soft shales of the 

 basal portion of the Salina. 



Albion quadrangle. Medina sandstone. Holley. The extensive 

 quarries in the Medina sandstone about Holley and the sec- 

 tions afforded along the banks of Sandy creek coming in from 

 the south, give an instructive exhibit of the character and varia- 

 tions in this formation. Along the banks of the creek to the 

 north of the town (station 22) are banks of red and green shale 

 15 feet thick and the lower sandstones are exposed in rather 

 thin red and brownish beds much mottled and interlaminated 

 with white, but with a single heaA^y homogeneous red layer at 

 the bottom. At a quarry near the towpath at the crossing of 

 the first north-south road east of the village, above the red 



