Classifying Rocks
Igneous Rocks
Sedimentary Rocks
Rocks from Reefs
Metamorphic Rocks
100
The look and feel of a rock
What is a rock's texture?
100
classified as: origin, texture, mineral composition
How are igneous rocks classified.
100
the process by with sediment settles out of the water or wind carrying it.
What is deposition?
100
produced skeletons that grow together to form a structure
What is a coral reef?
100
Metamorphic rocks that have their grains arranged in parallel layers or bands.
What is a foliated rock?
200
Igneous rocks, sedimentary rocks, metamorphic rocks
What are the three major groups of rocks?
200
Basalt, pumice, and obsidian have important uses.
What are the uses of igneous rocks?
200
The process that presses sediments together.
What is compaction?
200
When coral reefs die, their skeletons remain, and more corals build on top of them.
How does a coral reef form?
200
Marble and slate
What are the uses of metamorphic rocks?
300
No grain under a microscope.
What is no visible grain?
300
Size and shape of its minerals crystals.
What does the texture of an igneous rock depend on?
300
Small solid pieces of material that comes from rocks or living things
What is sediment?
300
barrier reefs, fringing reefs, and atolls
What are the three types of coral reefs?
300
heat and pressure beneath Earth's surface.
What changes any rock into metamorphic rocks.
400
Quartz, mica, feldspar, hornblende
What is granite made up of.
400
A rock with large crystals scattered on a background of much smaller crystals.
What is porphyritic texture?
400
the process in which dissolved minerals crystallize and glue particles of sediment together.
What is cementation?
400
a ring-shaped coral island found far from land.
What is an atoll?
400
by the arrangement of the grains that make up the rocks
How do geologists classify metamorphic rocks?
500
By looking at a small sliver of a rock under a microscope
How do geologists observe rocks?
500
Igneous rock that formed when magma hardened beneath Earth's surface.
What is intrusive rock?
500
occurs when running water or wind loosen and carry away the fragments of rock.
What is erosion?
500
Wisconsin, Illinois, Indiana, Texas, New Mexico, and many other places.
Where are there exposed reefs?
500
formed from sandstone
How does quartzite form?
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