No, not all igneous rocks are made from lava.
Igneous rocks are formed from the cooling and solidification of molten rock. This molten rock can be either magma (found beneath the Earth's surface) or lava (magma that has erupted onto the Earth's surface). Therefore, there are two main types of igneous rocks: intrusive and extrusive.
Intrusive Igneous Rocks
- Formation: Intrusive igneous rocks, also known as plutonic rocks, form when magma cools slowly beneath the Earth's surface.
- Characteristics: Slow cooling allows for the formation of large crystals, resulting in a coarse-grained texture.
- Examples: Granite, diorite, gabbro, and peridotite are examples of intrusive igneous rocks.
- Made From: Magma
Extrusive Igneous Rocks
- Formation: Extrusive igneous rocks, also known as volcanic rocks, form when lava cools rapidly on the Earth's surface.
- Characteristics: Rapid cooling results in small crystals or a glassy texture.
- Examples: Basalt, andesite, rhyolite, and obsidian are examples of extrusive igneous rocks.
- Made From: Lava
In summary, while lava forms extrusive igneous rocks, magma forms intrusive igneous rocks deep within the Earth. Therefore, all igneous rocks are not made from lava.
