Rocks

ROCKS

BY: JULIA STIER

What is a rock?

A rock is any solid group of minerals or mineral like matter that has occurred naturally.

Minerals can occur naturally, can come from a rock that broke up, or can be chemically made

Where are minerals found? Minerals can be found in: In mines Quarry’s Reserves

Igneous Rocks

Begins as molten rock on the earths surface and quickly cools and produces a rock

Magma

Happens from melting that occurs at different levels with in the earths crust

Once a magma body forms it floats to the top and creates an igneous rock

Once it reaches the earth crust it becomes lava

Extrusive Igneous Rocks

When the molten rock becomes solid at the surface,

It quickly cools and produces fine grained rocks, and mineral crystals you can’t see

Intrusive Rocks

When magma stops forming inside the earth

It begins to slowly cool.

Metamorphic Rocks

Process of change that causes mineral content, texture, and chemical composition all to change in some way

What causes Metamorphism? Usually formed when new conditions

arise

Sedimentary Rocks

Sediments that form together to make a rock

3 different types of sedimentary rocks

Detrital Sedimentary Rocks Gathering of particles that come from

mechanical and chemical weathering

Chemical Sedimentary Rocks Dissolved particles that come from

chemical weather (Acid rain) Begin dissolved in water and come

together over time to form something

Organic Sedimentary Rocks Most common example is Coal Forms from Carbon that is left on our

planet that died many years ago Examples…

Works Cited The Planet Really Rocks

. 2000. Oracale Think Quest. Web. 13 Oct. 2012. Rietze, Martin. Krakatoa

. 2010. Private collection . Web. 13 Oct. 2012. Study Droid Bitesize. BBC, Feb. 2010. Web. 13 Oct. 2012 Bryant, Ann. Geology Today

. N.p., Mar. 2010. Web. 13 Oct. 2012. Metamorphic rock. 2011. Geology Today . Web. 13 Oct. 2012. Detrital sedimentary Rocks

. 2011. Private collection . Web. 13 Oct. 2012. The Rock Cycle. 2012. Private Collection . Web. 13 Oct. 2012

. Time to End the War on Coal. 2010. Web. 13 Oct. 2012.