*1

ROCKS CREATED BY THE SOLIDIFICATION OF MAGMA OR LAVA

CREATED FROM MAGMA OR LAVA WHICH HAS SOLIDIFIED

PROCESSES OF FORMATION

LIQUIFICATION OR THE PARTIAL MELTING OF ROCKS IS CREATED BY

- REMINANTS FROM EARTH’S FORMATION- FRICTION FROM PLATE MOVEMENT

- RADIOACTIVE DECAY

WHERE DOES THE HEAT COME FROM?

LOCATION OF ROCK FORMATION

PLUTONIC - INTRUSIVE ROCKS COOLED AND CRYSTALIZED DEEP WITHIN THE EARTH

VOLCANIC - EXTRUSIVE ROCKS COOLED RAPIDLY AS THEY REACHED THE EARTH’S SURFACE

VOLCANIC ROCKS

VOLCANIC ROCKS

EXTRUSIVE (VOLCANIC)ROCKS FORMED ON THE SURFACE OF THE EARTH

INTRUSIVE (PLUTONIC)ROCKS FORMS ON THE INTERIOR OF THE EARTH

*4

FELSIC ROCK ALIMINUM BEARING ROCKS, TYPICALLY LIGHT COLORED

MAFIC ROCKSIRON BEARING ROCKS, TYPICALLY DARK COLORED

FELSIC ROCK ARE LESS DENSE THAN MAFIC ROCKS. THIS IS WHY THE MOST IGENOUS

ROCKS FOUND ON CONTINENTS ARE FELSIC, AND THE MORE DENSE MAFICS ARE FOUND

IN OCEANIC VOLCANIC REGIONS

*4

*4

PLUTONIC FEATURES

*4

FEATURE OF IGNEOUS INTRUSIONS

• COUNTRY ROCK - SURROUND ROCK LAYERS

• PLUTON - CHAMBER OF IGNEOUS ROCK

• DIKE - VERTICAL “TUBE” OF IGENOUS ROCK

• SILL - HORIZONTAL IGNEOUS LAYER

• XENOLITH - FOREIGN COUNTRY ROCK IN PLUTON

• BATHOLITH - MASSIVE PLUTON (100 KM2)