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| About 20 minerals that make up most of the rocks in of Earth's crust. |
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| generally light colored rock that has high silica content. |
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| dark colored rock that is low in silica. |
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| particles of minerals or other rocks. they give rocks texture. |
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| The look and feel of a rock's surface |
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| igneous, sedimentary and metamorphic |
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| forms from the cooling of magma or lava |
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| forms when particles of other rocks or the remains of plans and animals are pressed and emented together. They form in layers that are buried below the surface. |
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| forms when an existing rock is changed by heat, pressure or chemical reactions. Most are formed deep under ground. |
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| Any rock that forms from magma or lava. |
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| How are Igneous Rocks Classified? |
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Definition
| By origin, texture, and mineral composition. |
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| How are Igneous Rocks Classified? |
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Definition
| By origin, texture, and mineral composition. |
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| Igneous rock formed from lava that errupted onto earth's surface. Most common is Basalt. |
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| Igneous rock that is formed when magma hardened beneath the Earth's surface. Most abundant is Granite. |
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| Small crystals are formed |
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Definition
| Rapid cooling forms this size of crystal. |
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| Magma slowing cooling forms this size of crystal. |
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| Fine Grained, glassy texture. sometimes can not even form crystals. |
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| Most minerals contain this. Material formed from oxygen and silicon. This content affects types of rocks formed. |
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| High Silica Content in Magma |
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Definition
| forms light colored rocks such as granite. |
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| Tools and building materials. Granite for paving streets, counter tops, gravel, etc. |
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| A small solid piece of material that comes from rocks or living things. Can include rocks, shells, bones, leaves, etc. |
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| How are sedimentary rocks formed? |
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Definition
| through a series of erosion, deposition, compaction and cemetation. |
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| carrying away fragments of rock (i.e., water, wind & ice) |
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| Process by which sediment settles out of the water or wind carrying it. |
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| Process that presses sediments together. |
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| Proess in which dissolved minerals crystallize and glue particles of sediment together. |
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| # Major Types of sedimentary rocks |
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| Clastic Rocks, Organic Rocks and Chemial Rocks |
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| A sedimentary rock that forms when rock fragments are squeezed together. |
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| Forms where the remains of plants and animals are deposited in thick layers. |
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| When minerals are dissolved in a solution crystallizes. |
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| Uses of Sedimentary Rocks |
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| Building materials and tools. Arrowheads out of flint. sanstone and limestone for guilding supplies. Steel is a chemical. |
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| Skeletons of coral animals that grow together to form a structure. |
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| when corral animals die, their skeletons remain and more coral forms on top of them, creating this. |
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| What changes a rock into a metamorphic rock? |
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Definition
| Heat and Pressure deep beneath the Earth's surface. |
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| How are metamorphic rocks classified? |
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Definition
| According to the arrangement of the grains that make up the rocks. |
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Definition
| Metamorphic rocks that have their grains arranged in parallel layers or bands. |
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| most common foliated rock. |
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| The mineral grains of metamorphic rocks are arranged randomly. |
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| 2 metamorphic rocks that are nonfoliated |
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| What is lincoln's memorial statue made out of? |
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| Marble, a metamorphic rock. |
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| 2 most useful metamorphic rocks |
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Definition
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Definition
| Series of processes on Earth's surface and in the crust and mantle that slowly changes rocks from one kind to another. |
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| What does a rock's color tell about the rock |
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Definition
| provides lues to the rock's mineral composition. |
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| how geologists classify a rock |
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Definition
| using color, texture and mineral composition. |
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