More Than You Could Ever
Want To Know About
The Rock Cycle
By
Sam Flynn
404L
Earth Science
Cools and Hardens
Magma and lava cool into igneous rock.
A few examples of igneous rocks are
basalt, obsidian and granite.
Weathering and Erosion
Wind and water break up rocks and carry them away.
The sediments drop off in time.
Pressing and Cementing
Sedimentary rocks form when the weight of other
rocks cement the sediments together.
Sometimes in sedimentary rock layers
you can find fossils which tell you about
organisms from the past.
All fossils are at least ten thousand years old.
A few examples of sedimentary rocks are
sandstone, limestone and shale.
Heat and Pressure
This occurs deep underground. Heat and pressure
chemically change the rock into metamorphic rock.
Examples of metamorphic rocks are
marble and quartzite.
