397 



isolated hills and ridges attain altitudes of 

 above i,ooo feet (300 m.). 



At Woodstock the country on both sides of 

 the river is underlain by strata that have been 

 classed with the Ordovician. The measures 

 are everywhere tilted at high angles and in 

 many places are closely folded or contorted. 

 The strata in places are penetrated by large and 

 small bodies of granite. Besides slates, sand- 

 stones and occasional beds of limestone, " f el- 

 sites, " diabase, and other fine-grained igneous 

 rocks occur. In many places the strata are 

 much metamorphosed and are schistose or 

 gneissic. These or similar rocks form a wide 

 zone extending for many miles to the northeast 

 to the Bay of Chaleur. At one or two localities 

 fossils possibly of Ordovician age have been found 

 in the rocks of this assemblage. In a very few 

 other places, Silurian and lower Devonian fossils 

 have been found. 



These "Ordovician" strata are bounded on 

 the northwest by measures classed with the 

 Silurian. At Woodstock, the boundary between 

 the "Ordovician" and Silurian lies about i^ 

 miles (2-4 km.) to the west. This boundary, 

 pursuing a northeasterly course, crosses the 

 river about 10 miles (16 km.) above Woodstock. 



Two miles (3-2 km.) above Woodstock, the 

 railway crosses the St. John river to the east 

 bank. Above this point, the Ordovician strata 

 west of the river are confined to a very narrow 

 strip. Along the boundary with the Silurian 

 occur detached areas of coarse red conglomerate 

 with some finer materials. These measures 

 in places dip with angles as high as 60°; they 

 have been considered to be of Lower Carbon- 

 iferous age. 



About 10 miles (16 km.) from Woodstock, 

 the railway crosses the northeasterly extending 

 boundary of the "Ordovician" and enters the 

 Silurian which extends from this point north- 

 wards for 150 miles (240 km.), almost to the 

 shores of the St. Lawrence. Over the many 

 hundreds of square miles of territory that have 



