The Rock Cycle

Igneous rocks Formed by the cooling and crystallization of magma (magma is molten rock inside the earth) Intrusive igneous rocks are crystallized deep in the Earth Extrusive igneous rocks are formed where the lava flows to the surface

Formed by the cooling and crystallization of magma (magma is molten rock inside the earth)

Intrusive igneous rocks are crystallized deep in the Earth

Extrusive igneous rocks are formed where the lava flows to the surface

Igneous rocks are classified based on Texture Shape Size Arrangement of minerals

Igneous rocks are classified based on

Texture

Shape

Size

Arrangement of minerals

Metamorphic Rocks Can be formed in different ways Generally, they are re-crystallized by heat and pressure Igneous, sedimentary and metamorphic rocks can become new metamorphic rocks The new rock may have some of the original characteristics of the old rocks Sometimes the change is so complete that new minerals are formed and texture is changed

Can be formed in different ways

Generally, they are re-crystallized by heat and pressure

Igneous, sedimentary and metamorphic rocks can become new metamorphic rocks

The new rock may have some of the original characteristics of the old rocks

Sometimes the change is so complete that new minerals are formed and texture is changed

Two types of Metamorphic Rocks Follated - rock has layers Non-Follated - is crystalline and shows no layers

Two types of Metamorphic Rocks

Follated - rock has layers

Non-Follated - is crystalline and shows no layers

Sedimentary Rocks Formed at or near the surface of the Earth Sediments are deposited in beds or layers by water or wind as a result of erosion Ninety-eight percent of sedimentary rocks are shale, sandstone and limestone

Formed at or near the surface of the Earth

Sediments are deposited in beds or layers by water or wind as a result of erosion

Ninety-eight percent of sedimentary rocks are shale, sandstone and limestone

Types of Sedimentary Rock Clastic -rock fragments or minerals broken from pre-existing rock Chemical -results from chemical precipitation from fresh or salt water Organic -made from plant or animal particles

Types of Sedimentary Rock

Clastic

-rock fragments or minerals broken from pre-existing rock

Chemical

-results from chemical precipitation from fresh or salt water

Organic

-made from plant or animal particles

The Rock Cycle