Volcanic Environments

2. Volcanic Environments Match up the volcano with it’s location 3 4 1 5 2 C D E A B

3. Volcanic Environments 3 4 1 2 Submarine volcano erupting under the ocean at the Mid Atlantic ridge, a tensional (divergent) plate margin. A

4. Volcanic Environments 3 4 1 2 Composite cone volcano forming part of an island arc at a compressional margin where two oceanic plates meet and one is subducted under the other. B

5. Volcanic Environments 3 4 1 2 Composite (stratovolcano) volcano found at a compressional margin where an oceanic plate is subducted beneath a continental plate. Lava is acidic and viscous. C

6. Volcanic Environments 3 4 1 2 Shield volcano formed at a hotspot in the earth’s crust. Lava is basic and runny. Eruption is non-violent. D

7. Volcanic Environments Match up the volcano with it’s location 3 4 1 5 2 Caldera formed by collapse of magma chamber. Crater Lake is an example. Super volcanoes are very large calderas. E

8. Pacific Ring Of Fire

9. Anatomy of a Volcano Crater- top of volcano bowl shape Vent – opening Conduit – tube like structure connecting Magma chamber to vent Calderas- Very large depressions, forms when magma chamber empties, collapse and usually fills with water Summit- side of volcano that collapses into empty chamber

10. Types of Volcanoes Appearance of a volcano depends on • Type of material that forms the volcano • Type of eruptions that occur

11. 3 Major types of Volcanoes • Shield • Cinder • Composite Each differs in size, shape and composition

12. TEXT p. 506 • Compare and contrast the different types of volcanoes • Provide an example of each type • http://vulcan.wr.usgs.gov/Outreach/AboutVolcanoes/volcano_types_quick_reference.html

13. ANY QUESTIONS?