rocks

Igneous rocks are formed from the solidification of molten rock material.

Characteristics

Texture

grain size

crystal

Examples

1. obsidian

2. Granite

Basalt

Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water (rivers, lakes, and oceans), ice (glaciers), and wind.

Shale

Sandstone

Breccia

Chemical

Example

Evaporites

Gypsum

Halite-salt

Carbonate

Organic

Examples

hypocarbon

oil

Gas

coal

A metamorphic rock is a type of rock which has been changed by extreme heat and pressure. Its name is from 'morph' (meaning form), and 'meta' (meaning change).

Characteristics

Texture

Grain size

crystal size

composition

Example

Marble

Slate

Gneiss