Chapter 12 - Q&A

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1. What is the geologic significance of the Wopmay orogen, which formed nearly 2 billion years ago along the margin of the Slave Province of northwestern Canada?

A. The Wopmay orogen represents the oldest continental rifting event comparable to modern rifts, such as the Red Sea and East Africa rifts.

B. The Wopmay is the youngest orogenic event to emplace greenstones within a craton.

C. The Wopmay orogeny is associated with a Precambrian hot spot that tracked beneath continental crust, analogous to the Yellowstone hot spot today.

D. The Wopmay orogeny is the oldest well-displayed remains of a mountain system, analogous to the Appalachians, and formed by orogenic processes still operating on Earth today, as in the Himalayas.