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Rocks & Minerals

TermDefinition
Texture The look and feel of a rocks surface, determined by the size, shape, and pattern of a rocks grains.
Fine grain Fine-grained textures generally indicate magmas that rapidly cooled at or near the Earth's surface
Coarse grain Coarse grain varieties (with mineral grains large enough to see without a magnifying glass) are called phaneritic.
Porphyry a hard igneous rock containing crystals, usually of feldspar, in a fine-grained, typically reddish ground mass.
Intrusive Igneous Rock Intrusive igneous rocks form when magma cools slowly below the Earth's surface.
Extrusive Rock Extrusive igneous rocks form when magma reaches the Earth's surface a volcano and cools quickly.
Compaction Compaction refers to the process by which a sediment progressively loses its porosity due to the effects of loading.
Erosion the process of eroding or being eroded by wind, water, or other natural agents.
Cementation the binding together of particles or other things by cement.
Deposition Deposition is the geological process in which sediments, soil and rocks are added to a land form or land mass.
Clastic Rocks Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock
Chemical Rock Chemical sedimentary rocks form by precipitation of minerals from water
Sediment Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice, and/or by the force of gravity acting on the particles.
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Created by: 1964045844
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