Assignment 8: An Introduction to Igneous Rocks

Introduction

Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there.

Igneous rocks can have many different compositions, depending on the magma they cool from. They can also look different based on their cooling conditions. For example, two rocks from identical magma can become either rhyolite or granite, depending on whether they cool quickly or slowly. 

Directions: 

1) This assignment is designed to assist you in learning the concepts of this module as well as assess your understanding and application of the content. 

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3) This assignment must be completed by the due date assigned or the course late policy will be applied. 

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