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Flashcards in The Rock Cycle Deck (12)
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What three types of rock is the Earth composed of?

1. Igneous
* ignite - burning molten rock

2. Metamorphic - pure

3. Sedimentary

*** all can change into one another via the rock cycle ***


What is burning igneous rock under the surface called? Igneous rock that erupts?

Magma under ground

Lava out of ground


When lava comes out of the ground, quickly hardens, and has impurities, what type of rock is it?

Igneous - granite


When dried-up igneous rock experiences weathering and shifts away, what kind of rock does it become?


- In sedimentary rock beds
*the deeper the bed the older*


When continuity in rock layer changes what has occurred? What it is called?

After Deposition,

A fault shift occurred - discontinuity


When sedimentary rock is pressurized for a long period of time, what does it become?

Ex. Sedimentary - sandstone

Becomes metamorphic rock

Ex. Diamond


After a rock has become metamorphic, how does it return to igneous?

It is heated up tremendously and returns to igneous


Give examples of weathering

Physical - wind / rain / ice - expands rock and breaks it

Chemical - acid rain (a lot pollutants rain down) break down rock


What does weathering require?

Some degree of surface exposure. Land must have been exposed


Give the difference between land with smooth contours and angular landforms

- Land with smooth contours are older and have eroded more frequently

- angular landforms have experienced less erosion


How do fossil records help us determine depositional timelines of _________ ?

Sedimentary layers

- help us determine dating and timing of fossils & layers


What can help us determine rock strata and layers of rock?

1. Weathering
2. Depth
3. Fault shifts
4. Discontinuities
5. Deposition - order of layers

** newer layer of rock is on top of older layer of rock