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STRUCTURAL GEOLOGY OF NORTH AMERICA 



Nova Scotia in relation to the Appalachian front, and in having a 

 similar thick Proterozoic volcanic sequence of rocks. The zone marks 

 the site of a great Proterozoic trough in which volcanic rocks accumu- 

 lated voluminously and were frequently deformed. The Avalon peninsula 

 contains no sedimentary rocks younger than early Ordovician and may 

 have been an area of erosion since then. The Great Ray de 1'Eau con- 

 glomerate suggests a sharp uplift of eastern Newfoundland in late 

 Silurian or early Devonian time, and the region was probably affected 



by the Acadian movements and intrusions. The Precambrian of Nova 

 Scotia contains numerous batholiths, presumably of Acadian age. It is 

 entirely possible that the outer Precambrian uplift is one that dates back 

 to mid-Paleozoic time and is complex. 



The presence of the geanticline of Precambrian rocks along the outer 

 exposed margin of Greater Acadia is rather significant in demonstrating 

 that the continent has not been added to appreciably, or has not grown 

 seaward much, since Proterozoic time. 



