Divergent Plate Boundaries (continued)

• Triple Junction
  

---

Bulge over rising mantel plume

---

Development of 3 radial rifts

---

---

• Aulacogen
  

---

---

---

Oklahoma Aulacogen

---

---

Linear Sea

---

---

Breakup of Pangaea, Early Mesozoic
(Figure 14.2, p. 351)

---

Ocean Basin

• Divergent Margin
  
• Mid Ocean Ridge
  

---

---

---

Divergent Margin

• Upwarping Stage
  
  - Felsic Batholiths
  - Normal Faults
  - Mafic Volcanics
  
• Rift Basin Stage
  
  - Fault Bound Basins
  - Arkose
  
• Linear Sea
  
  - Evaporites
  
• Full Divergent Margin
  
  - Continental Shelf Deposits
  - Quartz Arenites & Shales
  - Carbonates
  

---

---

---

---

• Next Lecture
• Back to Lecture Presentations Main Page
• Back to Historical Geology Main Page

---

last updated 2-22-01

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