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Flashcards in The Rock Cycle Deck (12)
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0

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 ***

1

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

Magma under ground

Lava out of ground

2

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

Igneous - granite

3

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

Sedimentary

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

4

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

After Deposition,

A fault shift occurred - discontinuity

5

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

Ex. Sedimentary - sandstone



Becomes metamorphic rock

Ex. Diamond

6

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

It is heated up tremendously and returns to igneous

7

Give examples of weathering

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

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

8

What does weathering require?

Some degree of surface exposure. Land must have been exposed

9

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

10

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

Sedimentary layers

- help us determine dating and timing of fossils & layers

11

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