Explore the fascinating world of volcanoes in this 47-minute lecture covering various aspects of volcanic activity and formations. Learn about the nature of volcanic eruptions, different types of lava flows, and materials extruded during eruptions. Discover the anatomy of volcanoes, including cinder cones and other volcanic structures. Examine volcanic hazards such as pyroclastic flows and lahars, with a focus on the Mount St. Helens eruption. Investigate unique volcanic landforms like Crater Lake in Oregon and Shiprock in New Mexico. Delve into intrusive igneous activity and the formation of various igneous bodies. Understand the global distribution of volcanoes along the Ring of Fire and their relationship to tectonic plate boundaries, both convergent and divergent.
Overview
Syllabus
The Nature of Volcanic Eruptions
A Pahoehoe Lava Flow
A Typical aa Flow
Materials Extruded During an Eruption
Anatomy of a Volcano
Cinder Cones
Types of Volcanoes
Volcanic Hazards
Pyroclastic Flows
Lahar near Mt. St. Helens
Crater Lake, Oregon Caldera
Other Volcanic Landforms
Shiprock, New Mexico - a volcanic neck
Intrusive Igneous Activity
Intrusive Igneous Bodies
Ring of Fire
Convergent Boundary
Divergent Boundary
Taught by
Sven Holbik
