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all kinds of rocks and minerals

  • Interactives . The Rock Cycle . Types of Rocks - Annenberg Learner

    The three main types, or classes, of rock are sedimentary, metamorphic, and igneous and the ... Together, all these particles are called sediment. ... and may have shiny crystals, formed by minerals growing slowly over time, on their surface.

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  • The types of rock: igneous, metarmorphic and sedimentary

    Jan 12, 2015 ... The three main types of geological rocks are described. ... Some volcanic rocks (like obsidian) don't have any crystals at all. ... Metamorphic rocks can have crystals and minerals both from the initial rocks, and new minerals...

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  • The Gallery of Minerals With Pictures and Descriptions. - Rocks and ...

    Biotite Biotite is a member of the mica branch of the silicate mineral group. It is common as a rock-forming mineral and is present in all three rock types: igneous,...

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  • The Basics of Rocks and Minerals and Polar Geology — Rocks and ...

    Minerals, quite simply, are the building blocks for making rocks, and a rock is made up of one or more minerals. When you look at a rock and see different colors,...

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  • Rocks: Pictures of Igneous, Metamorphic and Sedimentary Rocks

    Igneous Rocks: Photos, descriptions and facts about intrusive and extrusive igneous rocks. ... Rock, Mineral and Fossil Collections. ... Rocks on Mars Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.

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  • Chapter 4 Rocks and Minerals - Volcano World

    Rocks are made of two or more different minerals that have been: 1. cemented together, or. 2. squeezed and heated together, or. 3. melted and cooled together.

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  • Rock Types - Sandatlas

    List of all Igneous, Sedimentary, and Metamorphic Rock Types with Pictures ... Rock types are specific assemblages of minerals (most rocks are composed of...

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  • List of rock types - Wikipedia

    A list of rock types recognized by petrologists. There is no agreed number of specific types of rocks. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe rock types. Additionally, different classification systems exist for each major type of rock. ... Foidolite - a plutonic igneous rock composed of >90% feldspathoid minerals...

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  • Identifying Rocks and Minerals/Types of Rocks - Wikibooks, open ...

    There are three different types of rocks: Igneous, Sedimentary, and Metamorphic. The difference between each type is in how they are formed.

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  • Types of Rocks - Kids Love Rocks

    This educational site is a resource for young rock and mineral collectors. Learn about ... Rocks come in many different colors, shapes, and sizes. Because no two...

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