ISCI 1A24 Lecture Notes - Lecture 1: Grenville Orogeny, Manicouagan Reservoir, Laurentia
Document Summary
Where can we find dinosaurs in canada. Oldest rocks in canada would be found in: Acasta gneiss 3. 96 billion years old, nwt. Original old continent called arctica 2. 5 billion years ago. 1. 9 billion y ago addition of southern province to form nena. 1. 3 billion addition of grenville orogeny to form rodinia, mountain building . Exposed part of the n. american craton. Manicouagan crater quebec (214 my), sudbury impact structure (1. 85 by generated much nickel from melting) Oldest known animals (complex life forms) ediacaran biota. Mistaken point, newfoundland impressions of soft-bodied animals, once deep- marine environment, jelly-fish like, died and sunk to ocean floor, covered in mud, preserved casts , 565-543 my old. Wapta, bc extremely rich fossil record, strange organisms. Hallucigenia almost like velvet worm, confusion as to how it moved, what it did. Came from collision of smaller continents from east. Addition of section to form appalachian mountains 600-300 mya. Baltica smashed into n. america created taconic mountains (niagara.