EESA06H3 Study Guide - Final Guide: Grenville Orogeny, Taconic Orogeny, Orogeny
Document Summary
How the north american continent evolved in 5 stages. 5 stages in the evolution of the north american continent. Within the oldest part of the continent, several geological provinces (such as rae, Superior, and wyoming) are rimmed by intensely deformed rocks that form ancient orogens (such as trongat and wopmay). Geological provinces can be regarded as the remains of individual continents that collided. Orogens: consists of crushed and deformed rocks that represent the remains of mountain belts or volcanic arcs formed during collision. Growth of na continent can be broken down into 5 different stages. Stage 1 arctica: north america in the archean. Hudson orogen and others: includes greenland, original na continent was the slave province! (size about 4 billion years ago) Arctica original na continent, begun to form 2. 5 ga years ago, nally assembly 2. Ga years ago, included much of present-day siberia.
