Mount Hood in northern Oregon is an active stratovolcano just east of Portland, formed because of the subduction of the Juan de Fuca Plate under the North American Plate. Photo by Vince Cronin.

Assignment

1. Read the study questions for this topic, listed at https://croninprojects.org/Vince/Course/PhysGeol/Geo1405-IgRox-Q2021.html and keep them in mind as you read the following assignments. Most, if not all, of the answers will be in the reading assignments for this topic.
2. View five short videos by Dave McConnell and friends —
   How To Melt Rocks,
   Partial Melting of Igneous Rocks,
   Magma Viscosity, Gas Content, and Milkshakes,
   How to Classify Volcanoes, and
   Naming Igneous Rocks.
3. Scan: Earth, chapter 4, Igneous Rocks and Intrusive Activity
4. Read: Earth, chapter 4, section 4.1 Magma: Parent Material of Igneous Rock
5. Read: Earth, chapter 4, section 4.2 Igneous Compositions
6. Read: Earth, chapter 4, section 4.3 Igneous Textures: What Can They Tell Us?
7. Read: Earth, chapter 4, section 4.4 Naming Igneous Rocks
8. Scan: Earth, chapter 5, Volcanoes and Volcanic Hazards

Mastering Geology Reminder

Complete the Dyamic Study Module called Igneous Rocks and HW05 by going to Mastering Geology through the Canvas space associated with this lecture section (202130 GEO 1405 01 - The Dynamic Earth)

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