ROCKS - Earth Science (2010) - RC3 Earth's Materials and Processes
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14 Terms
igneous rock
rock formed by the cooling/hardening of magma or lava
extrusive igneous rock
(definition)
rock that cools at Earth's surface
extrusive igneous rock
(characteristics and examples)
- small or no crystals
- fine-grained or glassy texture
pumice, obsidian, basalt
INtrusive igneous rock
(definition)
cools INside the Earth (below Earth's surface)
intrusive igneous rock
(characteristics and examples)
- large crystals
- coarser texture
granite
Rock Cycle Diagram
sedimentary rock
a rock that forms from compressed or cemented layers of sediment
fossils normally found in this type of rock
clastic sedimentary rock
sedimentary rock made up of bits of other rocks
(sandstone, conglomerate, shale)
nonclastic sedimentary rock
limestone, chalk, rock salt
metamorphic rock
rock that has been changed by heat and pressure
foliated metamorphic rock
a metamorphic rock that looks striped or has bands
(slate, schist, gneiss)
nonfoliated metamorphic rock
a metamorphic rock that does not have stripes or bands
(marble, quartzite)
Striation
striped or banded
three types of magma
basaltic, andesitic, granitic