CHAPTER 3 - CHAPTER 3: IGNEOUS ROCKS & PROCESSES...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CHAPTER 3: IGNEOUS ROCKS & PROCESSES - Igneous Rocks - - Without igneous processes, there would be no continents, no air, etc. - Magma - - Lava - - Most igneous processes occur underground - Erosion of these upper layers of Earth lets us see rocks that originally formed underground - **All the Earth’s oceans are underlain by igneous rocks, and all of its continental crust originated as igneous rock as well.** A BRIEF INTRODUCTION TO IGNEOUS ROCKS AND PROCESSES - Basalt - o Make up most of the oceanic crust and oceanic islands - Granite - o silica-rich rocks that crystallize underground - Rhyolite - o Silica-rich rocks that crystallize at the Earth’s surface from lava MELTING ROCKS AND CRYSTALLIZING MAGMA - Magma is a liquid rock that may still contain some crystals or interconnected ions. The Creation of Magma - Partial Melting - o Each mineral has its own melting point, a rock consisting of several different minerals typically undergoes partial melting Heat o Happens because of changes in other variables – pressure and water content— and not simply by heating. Pressure
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

CHAPTER 3 - CHAPTER 3: IGNEOUS ROCKS & PROCESSES...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online