PPT-Classification of Igneous Rock

Classification Classification of igneous rocks is based on mineral composition crystal size and texture Review Vocabulary fractional crystallization a sequential process during which early formed crystals are removed from the melt and do not react with the remaining magma . Colby Geology. Igneous Rocks. Classification based on . composition. and . texture. .. COMPOSITION. Principally the rock-forming minerals. Olivine. Pyroxenes. Amphiboles. Micas. Feldspars. Quartz. Constitute 95% of minerals in . ROCKS AND THE ROCK CYCLE. INTRUSIVE IGNEOUS ROCK. Formed under the surface of the earth. Formed from cooling magma. Cools slowly. Forms medium mineral grains. Granite is a light-colored . igneous rock. Igneous Rocks. Objectives. I can…. Define and describe Igneous Rocks. Explain how different Igneous Rocks are formed. Explain the process of Partial Melting and Fractional Crystallization . Classify and Identify Igneous . By Mr. Krall. What is a Rock?. A . rock. is a mixture of minerals.. Rocks form and reform through the . rock cycle. . . Lava/Magma. THE ROCK CYCLE. Igneous Rock. Igneous . (. ig. -nee-us) . rock. forms when molten rock cools and solidifies.. What are the different types and textures of igneous rocks?. How do cooling rates affect the grain sizes in igneous rocks?. What are some of the uses of igneous rocks?. Copyright © McGraw-Hill Education. Granite, Basalt, Obsidian, Pumice and many others . Igneous Rocks are records of the thermal history of Earth. Most common of all rocks is Granite: . Granite . is a light-colored . igneous rock.  with grains large enough to be visible with the unaided eye.  It forms from the slow crystallization of magma below Earth’s surface.  Granite is composed mainly of quartz and  feldspar with minor amounts of mica, amphiboles and other minerals.   This mineral composition usually gives granite a red, pink, gray or white color with dark mineral grains visible throughout the rock. Classification and Nomenclature of Igneous Rocks. . GLY 4310 - Spring, 2017. 2. Igneous Textures. Phaneritic:. Crystals are readily visible with the unaided eye.. Aphanitic:. Crystals, if present, are too small to be seen with the unaided eye.. Essential Questions:. Rock Cycle . A. . model that describes the formation, breakdown, and reformation of a . rock. .. Rock Cycle. Magma. Sediments. Igneous. Rock. Metamorphic. Rock. Sedimentary. Rock. 3 Types of Rocks. There are 3 different types of rocks;. Igneous. Sedimentary. Metamorphic. Igneous Rock . . Igneous rocks are formed by magma and lava as it cools. Igneous rocks form in two different ways. . 2. Major Rock Groups. Igneous. Formed from . molten rock (magma/lava) that has cooled. Literally means “from fire”. 1. Extrusive . igneous rock is formed from lava (on earth’s surface) and tends to solidify quickly. By David Allison. Igneous Texture. Texture: size, shape and arrangement of constituent mineral grains. Crystallinity: percentage of crystals versus glass, depends on:. Rate of cooling . SiO2 content of magma. CLASSIFICATION OF ROCKS:. ON THE BASIS OF MODE OF FORMATION ROCKS ARE CLASSIFIED INTO THREE CATEGORIES:. 1 IGNEOUS ROCKS. 2 SEDIMENTARY ROCKS. 3 METAMORPHIC ROCKS.  . ROCKS. IGNEOUS ROCKS:.  . IGNEOUS ROCKS, ALSO KNOWN AS PRIMARY ROCKS ARE FORMED BY SOLIDIFICATION OF MAGMA. MAGMA IS MOLTEN ROCK MATERIAL CONSISTING OF LIQUID,GAS AND CRYSTAL.IGNEOUS ROCKS ARE RECODS OF THERMAL HISTORY OF EARTH.. . GLY 4310 - Spring, 2020. 2. Igneous Textures. Phaneritic:. Crystals are readily visible with the unaided eye.. Aphanitic:. Crystals, if present, are too small to be seen with the unaided eye.. Fragmental: . The Rock Cycle. Defined: . The process by which all rocks on Earth are formed and how basic Earth materials are recycled over time . Note: A very, very long time. The Rock Cycle. Three main types of rock on Earth.