Geology 10031

Geology 10031 - 1 Starts at above Modern day Michigan to...

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Geology 1003-2 03/04/08 Lecture Notes Proterozoic 1) Divided into 3… a) Neo b) Meso c) Paleo 2) At the End of the Archean a) Mafic crust converts into a felsic crust i) Mafic crust is easily subducted b) Microcontinents has Barberton mountain land c) Coalesce i) Cratons=strength d) Shallow marine sediments appear 3) Into the Proterozoic a) Plate Tectonics i) Theme One (1) Assembly of Proto-North America (Laurentia) (a) 5-6 Archean cratons fused together by Proterozoic orogens (b) Major tectonic events: (i) Wopnay Orogen 1. Failed rift 2. Rifting- passive continental margin a. Sediments 3. Ocean basin closes 4. Mountain building (ii) Mid-Continent Rift
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Unformatted text preview: 1. Starts at above Modern day Michigan to modern day Iowa (iii) Grenville Orogeny 1. continent to continent collision (iv) Assembly of Rodinia (v) Breakup of Rodinia (2) Terms (a) Craton- stable region of a continent (b) Orogen- or Orogenic belts, belts of mountain building (c) Aulocogen- failed rift (d) Precambrian shield- area where Precambrian rocks are exposed ii) Theme Two (1) Assembly of the Super Continent b) Climate c) Life 4) Questions a) What is Dr. Hanor’s favorite mineral i) Barite (1) made of barium sulfate (2) formed by the mixing of sulfate rich seawater...
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Geology 10031 - 1 Starts at above Modern day Michigan to...

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