Oct. 9

From GeoClasses

Contents 1 Topics from chapter 10 1.1 Tectonics of North America 1.2 global tectonic provinces 1.2.1 tectonic provinces 1.3 growth of continents 1.4 modification of continents 1.4.1 orogeny 1.4.2 oldest crust (cratons)

Topics from chapter 10

Tectonics of North America

• see fig. 10.1
• stable interior
  • continental shield
• Appalachian fold belt
  • Valley and Ridge province
  • Blue Ridge province
  • Piedmont
  • coastal plain
• coastal plain and continental shelf
  • Atlantic
  • Gulf of Mexico
• North American Cordillera
  • includes Coast Range, Sierra Nevada, Basin and Range province, Rocky Mountains
  • geologic history of this area

global tectonic provinces

• cratons vs orogens

tectonic provinces

• shield
• platform
• continental basin
• Phanerozoic orogen
• extended crust

growth of continents

• magmatic addition
• continental accretion
  • accreted terranes
  • exotic terranes
  • see figs. 10.11 and 10.12

modification of continents

orogeny

• Alpine-Himalayan orogeny
  • see fig. 10.15, fig. 10.16
• assembly of Pangaea
  • fig. 10.17
• earlier orogenies
  • Wilson cycle
  • see fig. 10.18
• epeirogeny (vertical motion)
  • glacial rebound
  • lithospheric heating and cooling
  • see fig. 10.20

oldest crust (cratons)

• granite-greenstone terrains
• high-grade metamorphic terrains
• cratonic keels
  • mantle xenoliths
  • kimberlite pipes
  • see fig. 10.24