PPT-1 Extrusive Igneous Rocks, part 1

BASALTS DIABASES ANDESITES DACITES and RELATED ROCKS 2 Types of Igneous Rock Extrusive Intrusive Pyroclastic Lava Flow Hypabyssal Plutonic 3 Igneous Rock Classification Igneous rocks may be classified on the basis of what minerals they contain. Sedimentary . Metamorphic. . I. gneous. Sedimentary . Metamorphic. . FIRE. I. gneous. Sedimentary . Metamorphic. . Magma . C. ools. S. olidifies. Origin =. FIRE. I. gneous. Sedimentary . Metamorphic. Major Rock Groups . 2. Igneous . Sedimentary . Metamorphic. Rocks. are melted due to extreme heat creating . magma. . New rocks are . formed when. magma cools down.. Rocks form at Earth’s surface when. Igneous. rocks form from the solidification or crystallization of minerals in molten material.. If the rock form below the Earth’s surface it is considered . magma. Molten rock that hardens on the Earth’s surface is called . Introduction. Igneous Rocks – rocks that appear to have been molten in the past. Molten rock names (based on location). Magma: molten rock found anywhere beneath the earth’s surface. Lava: molten rock that flows out onto the earth’s surface. Syenite, Phonolite, . Ijolite. , Carbonatite, Ultramafic Rocks and Lamprophyre. 2. IUGS Intrusive Igneous Rock Chart . 3. General Intrusive Rocks Classification. . 4. Position on IUGS Diagram. Syenites are on the border between the QAP and the APF triangles. Granite, Alkali Feldspar Granite, Granodiorite, Quartz Monzonite, and Monzonite. 2. IUGS Intrusive Igneous Rock Chart . 3. “Granite”. Rocks in this lab are plutonic. They formed by very slow cooling and show corresponding large crystals. RHYOLITES, LATITE, TRACHYTE AND GLASSY EXTRUSIVE ROCKS. 2. IUGS Extrusive Igneous Rock Chart. 3. Silica Content Classification. 4. Naming aphanitic rocks. In naming aphanetic extrusive rocks, the name is often based only on a few phenocrysts. This is why a mafic name prefix is often used, for example hypersthene andesite. A better name is hypersthene phenoandesite.. Geology 121 Course Notes. Add Section Title. Add section detail briefings. Intrusive rocks. Porphyry. Pyroclasts. Extrusive rocks. Classification of Igneous Rocks. Intrusive rocks. Porphyry. Pyroclasts. Syenite, Phonolite, . Ijolite. , Carbonatite, Ultramafic Rocks and Lamprophyre. 2. IUGS Intrusive Igneous Rock Chart . 3. General Intrusive Rocks Classification. . 4. Position on IUGS Diagram. Syenites are on the border between the QAP and the APF triangles. Rocks are composed of two or more minerals. Rocks are very helpful in dating the age of the earth. Classification of Rocks. Igneous rocks. Sedimentary rocks. Metamorphic rocks. Igneous Rocks. The word ‘igneous’ has been derived from a . Molten material (aka magma or lava) cools. . L. ava . above the Earth’s surface. M. agma . below the Earth’s . surface. Where . - . Intrusive . Igneous . Rock. IN. trusive. . – . IN. SIDE . the Earth . Sedimentary-sandstone. Metamorphic- gneiss. Igneous- diorite. 1. What is a Rock?. Naturally Occurring . (not man made). Solid. Mixture of minerals other organic matter. 2. What makes a rock different from a mineral?. http://www.youtube.com/watch?v=aCnAF1Opt8M. 1. What are the building blocks of rocks? . 2. How are rocks classified?. 3. What are the parts of a volcano?. Magma chamber. vent. Crater. sill. Magma conduit. 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..