Rocks What is a rock’s favorite cereal? Coco pebbles! What’s a rock’s favorite golf course? Pebble Beach!

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Slide 2 Rocks Slide 3 What is a rocks favorite cereal? Coco pebbles! Whats a rocks favorite golf course? Pebble Beach! Slide 4 Types of Rocks Sedimentary Rocks Metamorphic Rocks Igneous Rocks Melted & cooled together Squeezed & heated together Cemented together Slide 5 Sedimentary Rocks How are they made? Wind and water break down the earth Bits of earth settle in lakes and rivers Layers are formed and build up Pressure and time turn the layers to rock Slide 6 Slide 7 Sedimentary Rock clastic broken pieces of rock non-clastic organic (created from remains of plants & animals) chemical (created when water evaporates) eg. limestone Classification of Sedimentary Rocks Slide 8 Sedimentary Rocks Where do you think sedimentary rocks would be formed/found near? streamsbeaches riversdeserts oceansglaciers coral reefs Slide 9 Types of Sedimentary Rocks Sandstone Shale Limestone Conglomerate Slide 10 Metamorphic Rocks How are they made? morphic means change so these are rocks that have changed. They were once igneous, sedimentary, or other metamorphic rocks. Pressure and heat cause the change. Slide 11 Metamorphic Rock foliated nonfoliated leafy flattened & layered minerals no banding These rocks are physically deformed and chemically changed due to temperature and pressure changes but the rock does not melt! Classification slate quartzite Slide 12 Where are metamorphic rocks likely formed/found near? In fault zones Mountain belts Mid-ocean ridges Slide 13 Types of Metamorphic Rocks SchistGneiss Slide 14 Igneous Rocks What are They? Ignis is Latin for fire-igneous rocks are fire rocks Ignis is Latin for fire-igneous rocks are fire rocks Formed underground by trapped, cooled magma Formed underground by trapped, cooled magma Formed above ground when volcanoes erupt and magma cools Formed above ground when volcanoes erupt and magma cools Slide 15 Igneous Rock intrusive (plutonic) extrusive (volcanic) large crystals & coarse texture Glassy/smooth & small crystals usually not even visible felsic mafic light colored eg. quartz dark colored eg. Iron & magnesium containing Slide 16 Where are igneous rocks likely formed/found near? Mid-ocean ridges Subduction zones volcanoes Slide 17 Types of Igneous Rocks Granite Scoria Pumice Obsidian Slide 18 Idioms and Expressions to Ponder Heart of stone Head full of rocks Stuck between a rock and a hard place in a situation where you have to make a decision that has no good options or solution unaffectionate, unforgiving, cold acted without thinking intelligently Slide 19 Every rock tells a story about: how it formed the environment where it has been what it has experienced Each of these stories is an adventure. We need to learn how to read a rock like we read a book. Slide 20 Roundness and Sorting Roundness presence or absence of corners and sharp edges Particles get rounder as they are transported. Sorting - is a texture that indicates how long the sediments have been in the water system. Poorly sorted sediments show a wide range of grain sizes; well-sorted ones have similar sized grains. Sorting increases with transportation. Slide 21 High Energy low energy Slide 22