The Geology of the O. and P. S. Railway. 



^73 



have been kindly furnished by Mv. James White, Geographer 

 to the Geological Survey. 



Trenton and Utiea, well expose<i. 



Potsdam sandstone and taurentian gneiss an<] limestone 

 with diorile and granite. Mica and gra]ihite in the 

 vicinity. 

 Clays and gravels ; the latter with marine she! is, uuder- 

 laid by Black River limestone. Lanrentian gneiss 

 and granite in ridge to the north. 

 Clay flat, underlaid by the Black Kivei lormation. 

 Laurentian granite and gneiss with crystalline lime- 

 stone in ridge to the north. jMarine shells on 

 summit of ridge three miles to the north. 

 Mostly crystalline limestone of the old series with .some 

 gneiss, cut by dykes of granite. Marine shells near 

 Mohr's Corner about a mile to the .south-east. 

 Bluish striped crystalline limestone of the Hastings 

 ■series, overlaid by Calciferous limestone. Black 

 River outcrops to the south. 

 Ridge of black hornblende-rocks an<i reddish granite 

 which cuts the striped limestone of the vicinity, 

 Hastings seiies. Marine shells on Sand Point ridge, 

 three miles 10 the north east. 



Striped crystalline limestone. 



Striped crystalline limestone of the Hastings series, with 

 ridges of hornljlende schist and masses of reddish 

 granite. Im]iortant <juarries in the limestone. 



Clay flat of the Bonnecheve. 



Large outliers of the Black River limestone with 

 crystalline limestone and gneiss underlying. 



Mostly reddish granitic gneiss ; some pyroxenic rocks in 

 the vicinity. The 4th chute of the Bonnechere to 

 the north. 



Drift with large outliers of ihe Black River formation in 

 the vicinity. Chazy and Black liiver rocks on the 

 Bonnechere at the village. 



Crystalline limestones and gnei.sses with granite. 



Reddish and hornblende gnei.ss, well stratified. 



Gneiss and granite. Much of the country occupied by 

 drift sand and gravel 



Galetla. 



Arnprior. 



Glasgow. 



402 



309 



350 



Geological Survey Department, 

 Ottawa, Canada. 



