Paleozoic (continued)

Late Paleozoic (Chapter 12)

Appalachian-Ouachita Mobil Belt

• Acadian Orogeny
  
  - Devonian
  - Collision of Baltica & Laurentia
  
  - Laurasia
  

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433 myrs

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363 myrs

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• Evidence for Acadian Orogeny
  
  - Metamorphic and Igneous Rocks
  
  - 360-410 myrs
  
  - Catskill Delta Clastic Wedge
  

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• Alleghenian and Ouachita Orogenies
  
  - Pennsylvanian-Early Permian
  - Collision of Laurasia and Gondwana
  
  - Pangea
  

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306 myrs

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- Folding and Thrusting

- Valley and Ridge Province
- Ouachita Mountains

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Harrisburg PA

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• Physiographic Provinces of Appalachian Mobil Belt
  
  • Appalachian Plateau
    
  • Valley and Ridge
    
  • Blue Ridge Province
    
  • Piedmont
    
  • Coastal Plain
    

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Cordilleran Mobil Belt (Western margin)

• Passive Continental Margin
  
  - Late Proterozoic-Early Paleozoic
  
• Antler Orogeny
  
  - Late Devonian
  - Collision of Island Arc with Craton
  - Central Nevada
  - Antler Highland
  - Roberts Mountain Thrust
  

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• Ancestral Rocky Mountains
  
  - Pennsylvanian
  - Stress release from collision of Gondwana and Laurasia
  

Craton

• Kaskaskia Sequence
  
  - Devonian-Mississippian
  - Dominantly Limestone
  
  - Columbus Limestone (Dev.)
  
  - Black Shales
  
  - Cleveland Shale (Dev.)
  

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Columbus LS

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Cleveland Shale

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• Unconformity between Kaskaskia and Absaroka Sequences
  
  - Mississipian-Pennsylvanian Boundary
  
• Absaroka Sequence
  
  - Pennsylvanian-Triassic
  - Cyclothems
  
  - Pennsylvanian
  - Coal Deposits
  - Glaciation in Gonwana
  

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Figure 12.11, p.332

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last updated 1-11-98

All original material copyright (c) 1998 by Annabelle Foos. All rights reserved.