Hotspot Lesson: Mantle Plumes
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Summary
This lesson explains a theory on magma generation at hotspots called the mantle plume theory as well as possible ways of finding evidence to support the theory. This theory was introduced in the early 1970's by W. Jason Morgan in absence of a good plate tectonic model explaining the existence of seamount trails in the middle of all oceanic tectonic plates. The goal of this lesson is to introduce students to a theory that scientists are actively trying to evidence or refute. Through this students will learn about mantle tomography which helps scientists make predictions about the inside of the earth.
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Learning Goals
Context for Use
This activity was developed for use in a high school (grades 9-12) earth science class. It is also appropriate for an introductory level college geoscience class.
Lesson duration: Approximately 25 minutes.
Description and Teaching Materials
The Mantle Plume Lecture introduces students to the latest techniques of studying the structure and dynamics of the mantle in the deep earth.
This lesson explains a theory on magma generation at hotspots called the mantle plume theory as well as possible ways of finding evidence to support the theory. The goal of this lesson is to introduce students to a theory that scientists are actively trying to evidence or refute. Through this students will learn about mantle tomography which helps scientists make predictions about the inside of the earth.
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Assessment
Based on the information presented in the lecture, students should have become aware of the novel techniques used to study the hypothesized mantle plumes. Their heightened awareness is the assessable product.
References and Resources
Lesson Materials
Mantle Plume LectureERESE Resource Matrices
Formation of SeamountsHotspots and Plate Motion
Volcanoes