Igneous Rocks:
* Intrusive (formed from cooling magma below the surface):
* Granite: Light-colored, coarse-grained, often found in mountain ranges.
* Gabbro: Dark-colored, coarse-grained, often found in oceanic crust.
* Diorite: Intermediate in color and grain size, often found in batholiths.
* Peridotite: Very dark, coarse-grained, found in the Earth's mantle.
* Extrusive (formed from cooling lava above the surface):
* Basalt: Dark-colored, fine-grained, common in volcanic areas.
* Rhyolite: Light-colored, fine-grained, often found in volcanic eruptions.
* Andesite: Intermediate in color and grain size, common in volcanic arcs.
* Obsidian: Black, glassy, formed from rapidly cooling lava.
* Pumice: Light, porous, formed from frothy lava.
Metamorphic Rocks:
* Foliated (show layers or banding):
* Slate: Fine-grained, splits easily, often used for roofing.
* Schist: Medium-grained, contains mica, often glittering.
* Gneiss: Coarse-grained, banded, often with layers of light and dark minerals.
* Non-foliated (no layers or banding):
* Marble: Calcite-rich, often used for sculptures and buildings.
* Quartzite: Hard, made of quartz, often used for building materials.
* Anthracite: A high-grade, hard, black coal.
Sedimentary Rocks:
* Clastic (formed from fragments of other rocks):
* Sandstone: Made of sand grains cemented together.
* Conglomerate: Made of rounded pebbles cemented together.
* Breccia: Made of angular fragments cemented together.
* Shale: Made of fine clay particles, often splits into layers.
* Chemical (formed from precipitation or evaporation):
* Limestone: Made of calcium carbonate, often formed from marine organisms.
* Rock salt: Formed from evaporation of seawater.
* Gypsum: Formed from evaporation of seawater.
* Organic (formed from the remains of organisms):
* Coal: Formed from the remains of plants.
* Oil Shale: Made of organic matter deposited in fine-grained sediment.
These are just a few examples of the many different types of rocks found on Earth. Each type of rock has its own unique characteristics and formation process.
