THREE TYPES OF ROCKS

DIFFERENT TYPES OF ROCKS

DEFINE ROCK

How Are Rocks Classified?
-The minerals and organic matter a rock contains determines composition.
-The size,shape and position of the grains that make up a rock determine a rocks texture.

How do Igneous rocks from?
IGNEUS ROCK FROMS WHEN HOT, LIQUID MAGMA COOLS INTO SOLID ROCK

HOW DO INTRUSIVE IGNEOUS ROCKS FORM?

• When magma doesn't reach the earths surface it cools in large chambers or layers surrounding rock. Magma pushes it down and the rock cools on the Earths surface.
• Ex. Granite, or diorite.

HOW DO EXTRUSIVE IGNEOUS ROCKS FORM?

• Igneous rocks that form when lava erupts or extrudes onto Earths surface.
• Ex. Obsidian

HOW DO SEDIMENTARY ROCKS FROM?

• They can form from weathering,erosion,deposition, burial, and cementation

THE THREE TYOES OF SEDIMENTARY ROCKS

HOW DO CLASTIC SEDIMENTARY ROCKS FROM?

• Sediments are buried compacted, and cemented together by calcite and quartz
• Ex. Sandstone

HOW DO CHEMICAL SEDIMENTARY ROCKS FORM?

• Form when water, usually seawater evaporates
• Ex. Halite.

HOW DO ORGANIC SEDIMENTARY ROCKS FORM?

• Organic sedimentary rocks form from the remains of fossils of once living plants and animals.
• Ex. Coal, Coquina

HOW DO METAMORPHIC ROCKS FORM?

HOW DO FOLIATED METAMORPHIC ROCKS FORM?

• The metamorphic process in which mineral grains are arranged in planes or bands.
• Ex. Schist, gneiss.

HOW DO NON-FOLIATED ROCKS FORM?

• They are commonly made of one or few minerals. During metamorphic mineral grains or crystals may change shape or size, some may change into another mineral
• Ex. Quartzite and Marble