metamorphic and sedimentary rocks
DESCRIPTION
Metamorphic and Sedimentary Rocks. What are they?. Rocks that change because of temperature and pressure or the presence of hot watery fluids can form from igneous, sedimentary, or other metamorphic rocks. . What happens?. Heat and pressure can cause minerals to enlarge. - PowerPoint PPT PresentationTRANSCRIPT
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Metamorphic and Sedimentary
Rocks
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What are they?• Rocks that change because of
temperature and pressure or the presence of hot watery fluids• can form from igneous,
sedimentary, or other metamorphic rocks.
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What happens?• Heat and pressure can cause
minerals to enlarge.• One kind of rock can change
into many other kinds!
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For Example:• Shale --------- Slate
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Classifying
•Foliated or nonfoliated • (VOCAB WORDS)
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Foliated?• When mineral grains line up in parallel layers
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Nonfoliated?• The mineral
grains grow and rearrange, but they don’t form layers.
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Question 1
What type of rocks can form from any type of rock?
A. igneous B. intrusive C. metamorphicD. sedimentary
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Answer
The answer is C. Heat, pressure and hot fluids trigger changes in various rock types forming metamorphic rocks.
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Question 2
Name the metamorphic rock texture in which mineral grains line up in parallel layers.
A. foliated B. nonfoliated C. sedimentary D. volcanic
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Answer
The answer is A. Slate is a foliated metamorphic rock formed from shale.
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Question 3
Which of these is a nonfoliated metamorphic rock?
A. basalt B. marble C. shale D. slate
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Answer
The answer is B. Marble forms from limestone. Basalt is an igneous rock. Slate is a foliated metamorphic rock that forms from the sedimentary rock, shale.
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Sedimentary Rocks• Igneous rock is the most common
on Earth.• Most of igneous is under ground.• About 75% of the rocks exposed
on Earth’s surface is sedimentary.
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What is it?• Vocab Review: Sediments are loose
materials such as rock fragments, mineral grains, and bits of shell that have been moved by wind, water, ice, or gravity. • Sedimentary rock forms when sediments
are pressed and cemented together, or when minerals form from solutions.
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Superposition•What is superposition?
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What do you think?•What materials can
sedimentary rocks be made from?• Can remains from other plants
and animals be turned into sedimentary rock?
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Classifying• Detritol – “detritus” means to tear
away. • What do you think will cause these kind?• Chemical-form when dissolved
minerals come out of solution. • Organic-Rocks made of the remains
of once-living things.