LAVA

It is basically the magma that escaped through the surface.

Types of Lava:

1) Dark-colored and contains a lot of water

- rich in iron and magnesium; forms basalt

2) Light-colored and contains very little water

- contains iron, magnesium, and silica; forms rhyolite (resembles granite)

- forms andesite

4) Contains large amount of gas such as steam and CO2

- forms pumice and scoria with many holes in them