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rocksssssssssssssss

TermDefinition
Rocks Make up the earth's crust, that are made of a mixture of minerals and other materials
Texture the look and feel of the rocks surface; the grain: what gives the rock its texture. Grain size, grain shape, grain pattern, no visible grain
Mineral Composition geologists use a microscope to observe the shape and size of the rock’s crystals.
Sedimentary forms in layers from sediment
Igneous forms from magma or lava
Metamorphic formed deep underground with heat & pressure
Igneous Rocks formed from intense heat that comes from magma or lava.
Extrusive Rocks igneous rocks formed from lava that erupted onto Earth's surface
Intrusive Rocks igneous rocks formed from magma that hardens beneath Earth's surface
Texture depends upon the size and shape of the crystals
Porphyritic texture large crystals surrounded by small crystals, which form when magma cools in two stages.
Uses of Igneous Rocks Used because they are hard, dense, and durable
Basalt gravel
Pumice cleaning and polishing
Perlite soil mixes
Obsidian sharp tools
Granite building materials
Sedimentary Rocks formed from layers of sediment deposited by water and wind;
sediment small solid pieces of rock or living things.
Erosion wind or water carry sediments
Deposition when the water or wind stops carrying the sediments
Compaction presses sediments together
Cementation when dissolved minerals and sediment glue together.
Clastic Rocks formed sedimentary rocks are squeezed together
Examples of clastic rocks shale, sandstone, conglomerate, and breccia
Created by: user-2006721
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