PPT-ROCKS

Types and famous rocks What is a rock A rock is a structure composed of one or more minerals Igneous Rocks Also called plutonic rocks Formed from magma intrusive rocks form underground extrusive rocks form above ground. “Liquid Hot Magma!”. Igneous Rocks. Rocks formed from cooling of lava or magma. Lava-Melted rock erupted from volcanoes and deposited on the earth’s surface. Cools quickly.. Magma-Melted rock that sits inside the earth in a magma chamber. Cools slowly.. Sedimentary rocks cover ~ 75% of Earth’s surface. ~ 5 % (by volume) of Earth’s outer 10 miles. Contain evidence of past environments:. Important resource. Coal, oil, and other fossil fuels. Groundwater resources. Chemical Sedimentary Rocks. . Limestone. Chert – Silica. Evaporites. Organic Rocks. Coal. Oil and natural gas. Clastic Sedimentary Rocks. Formed from clasts (bits and pieces of pre-existing rocks) transported, deposited,and lithified. Change is Good. Metamorphic Rocks. Formed from intense heat and pressure!. Sources of Heat. 300-1400 degree Celsius temperatures are needed for Metamorphism.. Sources of heat include:. Magma or lava. Metamorphism. Metamorphic rocks: appear to have changed in their structure or chemical composition since their creation or formation.. Originally sedimentary or igneous. Altered by heat, pressure, or exposure to hot fluids in earth’s crust. 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. LOWER-GRADE REGIONAL METAMORPHICS. Slate, Phyllite, . “Greenstone” and Schist. 2. Metamorphic Rock Definition. A sedimentary, igneous, or previously existing metamorphic rock which has undergone textural, structural, and/or mineralogical changes due to the action of one or more agents of metamorphism. Rocks that crystallized directly from a melt. Igneous rocks . Form as magma cools and crystallizes . Rocks formed inside Earth are called . plutonic. or intrusive rocks . Rocks formed on the surface . HIGHER-GRADE REGIONAL METAMORPHICS. Gneiss and Eclogite. 2. High-Grade Regional Metamorphic Facies. Rocks in this laboratory represent high to very high grade regional metamorphic rock. Facies represented are the amphibiolite, granulite, and eclogite facies. CONTACT AND DYNAMIC METAMORPHIC ROCKS. Hornfels, Skarns, Talc-Tremolite Schist, and Epidosite. 2. Contact and Dynamic Metamorphism. The rocks in this lab are formed either by contact metamorphism or by dynamic metamorphism associated with movement along a fault. Bell ringer: . Looking at the pictures, what do you think metamorphic rocks are? . What are Metamorphic Rocks? . Metamorphism means “to change form”.. Metamorphic rocks are rocks that form when . UNIT . 5. What are Sediments. Sediments are loose Earth materials (unconsolidated materials) such as sand . which are . transported by the action of water, wind, glacial ice and . gravity.. These . materials are . Copy the table below and explain the following clues that can be found in rocks.. . Clues. What the clue tells us?. Magnetic particles in rocks.. Fossils in the rocks.. Ripples in the rocks.. Minerals in the rocks. Rocks are classified by how they are formed, their composition, and texture. Rocks change over time through the rock cycle. TYPES OF ROCKS. ROCKS ARE DIVIDED INTO THREE GROUPS BASED ON HOW THE ROCKS .