For those about to Rock We salute you!

review Use the iPads to research and add to your Last time we organized rocks according to shapes, size, colors, ect. We then reorganized them according to 3 categories, which are: Sedimentary Metamorphic Igneous Use the iPads to research and add to your notes on the 3 different rock types. Leave some space for additional notes.

What type of rocks are these?

Sedimentary rocks Clastic Chemical Organic These rocks are formed by the accumulation of sediments. Pressure is the primary source of formation, not heat. There are 3 different types of sedimentary rocks: Clastic Chemical Organic

Sedimentary Breccia is a clastic sedimentary rock that is composed of large angular fragments. The spaces between the large fragments can be filled with a matrix of smaller particles or a mineral cement which binds the rock together.  Other clastic sedimentary rocks include conglomerates, sandstone, siltstone and shale. These are formed by mechanical weathering.

Sedimentary This is Chert. It’s a sedimentary rock formed by chemical composition. Early people took advantage of how chert breaks and used it to fashion cutting tools and weapons. Other chemical sedimentary rocks include rock salt, iron ore, flint, dolomites and some limestone.

Sedimentary This is coal. It’s an organic sedimentary rock formed mainly by plant debris which accumulates in a swamp environment. Coal is combustible and often used as a fuel source. Other organic sedimentary rocks include some dolomites and some limestones.  

Make your own

Draw a picture of the starburst “rock” you have created in your notebook.

What type of rocks are these?

Metamorphic rocks Foliated Non-foliated Metamorphic rocks have been modified by heat, pressure, and chemical processes, usually while buried deep below Earth's surface. Exposure to these extreme conditions has altered the mineralogy, texture, and chemical composition of the rocks. There are two basic types of metamorphic rocks. Foliated Non-foliated

metamorphic This is a Gneiss rock! It’s foliated which means it has a layered or banded appearance that is produced by exposure to heat and directed pressure. Other foliated rocks include phyllite, schist and slate.

metamorphic This is a non-foliated rock. This specific type is called a hornfels. It does not have a layered or banded appearance. They are produced by contact metamorphism. That means it was "baked" while near a heat source such as a magma chamber. Other non-foliated rocks include marble, quartzite and novaculite.

Make your own

Draw a picture of the starburst “rock” you have created in your notebook.

What type of rocks are these?

Igneous rocks Intrusive Extrusive Igneous rocks are formed by the solidification of molten rock material. There are two major types: Intrusive Extrusive

igneous Intrusive igneous rocks crystallize below Earth's surface, and the slow cooling that occurs there allows large crystals to form. This particular rocks is diorite. Other examples of intrusive igneous rocks are gabbro, granite, pegmatite and peridotite.

igneous Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals. Some cool so quickly that they form an amorphous glass like this particular example of obsidian. Other examples of extrusive igneous rocks are andesite, basalt, pumice, rhyolite, scoria and tuff.

Make your own

Draw a picture of the starburst “rock” you have created in your notebook.