ROCKS

IGNEOUS ROCK

INTRUSIVE IGNEOUS ROCK

• Forms inside the earth
• Forms from slow cooling magma
• Large crystals form

Extrusive igneous rock

• Forms from fast cooling lava
• Small crystals to no crystals for
• Air bubbles could form from how fast the lava cools

SEDIMENTARY ROCKS

CLASTIC SEDIMENTARY ROCKS

• Forms from compacted sediments
• Classified by their size

ORGANIC SEDIMENTARY ROCK

• Contains only biological matter

CRYSTALLINE SEDIMENTARY ROCK

• Forms when liquid evaporates and leaves minerals behinds
• Also forms from precipitation

METAMORPHIC ROCK

Contact metamorphic rocks change when rocks come in contact with high heat.

Regional metamorphic rocks are changed when rocks come into contact with high pressure.

Non-foliating rocks: don't have air bubbles.
Foliating rocks: have air bubble