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Science Test Nov 15 & 16 All 27 Terms

Terms

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how geologists classify metamorphic rock
arrangement of grains that make up the rock
conditions under which metamorphic rock forms
when an existing rock is changed by heat, pressure or chemical reactions deep underground
cementation
the process by which dissolved minerals crystalize and glue particles of sediment together into one mass
3 types of rocks
sedimentary, metamorphic and igneous
coral reef
a structure of calcite skeletons built by coral animals in warm shallow water
deposition
the process by which sediment settles out of the water or wind that is carrying it, and is deposited in a new location
porphyritic texture
an igneous rock texture in which large crystals are scattered on a background of much smaller crystals
rock cycle
a series of processes on the surface and inside Earth that slowly changes rocks from one kind to another
foliated
term used to describe metamorphic rocks whose grains are arranged in parallel layers or bands
texture
look that results from size, shape & pattern of the rock's grains
characteristics used to classify rocks
color, texture and mineral composition
how do coral reefs become organic limestone deposits on land?
Coral reefs are really organic limestone that began as coral. Over time the coral is buried by sediments. The limestone can be found on Earth in places where uplift has raised the sea floors above sea level.
igneous rock
rock that forms from cooling of molten rock or rock below the surface
atoll
a ring shaped coral island found far from land
grain
particle of a mineral or other rock that gives a rock it's texture
3 types of sedimentary rocks
clastic, organic and chemical
how sedimentary rocks form
through the deposition, compaction and cementation of sediments
intrusive rock
igneous rock that formed when magma hardens beneath Earth's surface
compaction
the process by which sediments are pressed together under their own weight
chemical rock
sedimentary rock that forms when minerals crystalize from a solution
characteristics used to classify igneous rocks
origin, texture and mineral composition
metamorphic rock
type of rock that forms from an existing rock that is changed by heat, pressure or chemical reactions
sediment
small solid particles of material from rocks or organisms which are moved by water or wind resulting in erosion and deposition
organic rock
sedimentary rock that forms where remains of organisms are deposited in thick layers
clastic rock
sedimentary rock that forms when rock fragments are squeezed together under high pressure
extrusive rock
igneous rock that forms from lava on Earth's surface
sedimentary rock
type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together

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