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Unit 3 Vocabulary

Teacher: Sue Aysenne
Describes the texture of very coarse grained igneous rocks having crystals larger than 3 cm
Fine grained igneous rock that cooled quickly at the surface also called volcanic rock
The rocky outer layer of the solid earth averaging about 100 km in depth includes the continents, islands, and the entire ocean floor
Living or derived from living organisms
Light colored igneous rock or molten rock with high silica content
The elements that make up a rock or a mineral
The idea that processes at work today on earth are the same processes that worked on the earth in the past, accounts for geologic features and changes
Describes a process of sedimentary rock formation whereby minerals in water are precipated when the water evaporates away
Dark colored igneous rock or molten rock with low silica and high iron magnesium content
Derived from non-living things
A rock or sediment made up of fragments derived from preexisting rocks that have been transported from their place of origin
Rock formed when sediments are compressed together and turned to stone, consolidated from loose sediment to solid rock
The molten or partly molten mixture of minerals, gases, and melted rocks found below the earth's surface
A standard of 10 minerals by which the hardness of all minerals may be rated
Rock that has undergone change caused by intense heat and pressure from an earlier form without melting
The tendancy of a mineral to break along one or more distinct planes
The regular, orderly and repeated arragement of atoms in a crystal
The process by which a rock or mineral is broken down
The trace or remains of an organism preserved in rok
Coarse grained rock that cools slowly underground also called plutonic rock
Texture in metamorphic rock characterized by layers of sheets of minerals
The gradual movement of the surface of the land by water, wind and glaciers
Rock formed by the cooling and solidification of hot liquid magma or lava
The process of converting sediments to solid rock, generally by cementing or compacting them
A mass or body of rock particles mineral grains or a mixture of both
The tendancy of a mineral to break unevenly
A naturally occuring inorganic solid substance with a fixed chemical composition and crystal structure
Molten rock or magma that emerges from the earth's surface