Cenozoic (continued)

Late Miocene (20 myrs)

• Extensional deformation
  
• Basin and Range Province
  

---

---

---

Saguaro National Monument, Tucson, AZ

---

---

Santa Rosa Mtns, AZ

---

- Crustal Extension Models for the Basin and Range Province
figure 17.30, p.499

---

Back-arc spreading

---

Mantle Plume (Hot Spot)

---

Overriding the East Pacific Rise

---

---

Cenozoic Volcanism

---

Figure 17,23, p. 493

---

• Yellowstone area (Eocene)
  

---

Absaroka Mtns., WY

---

---

Close-up of volcanoclastic deposits

---

• Columbia River Flood Basalts (Miocene)
  

---

---

• Snake River Plain (Pliocene)
  
• Yellowstone (Quaternary)
  

---

---

• Cascade Range (Quaternary)
  

---

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

---

last updated 1-14-98

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