Here's a breakdown:
* Magma: Molten rock found beneath the Earth's surface.
* Intrusion: The process where magma forces its way into existing rock layers.
* Igneous rock: Rock formed from the cooling and solidification of magma or lava.
What happens during igneous intrusion?
1. Upward Movement: Magma, being less dense than the surrounding rock, rises towards the surface.
2. Fracturing and Melting: As magma pushes upwards, it can fracture and melt the surrounding rock, creating pathways for further intrusion.
3. Solidification: When the magma cools and solidifies, it forms igneous rock. This rock can take on various forms depending on the type of intrusion.
Types of igneous intrusions:
* Dikes: Tabular intrusions that cut across existing rock layers.
* Sills: Tabular intrusions that are parallel to existing rock layers.
* Laccoliths: Dome-shaped intrusions that push up overlying rock layers.
* Batholiths: Large, irregularly shaped intrusions that form the core of many mountain ranges.
* Stocks: Smaller, irregular intrusions that are related to batholiths.
Igneous intrusions play a significant role in shaping the Earth's crust. They can create mountains, form valuable mineral deposits, and even influence the flow of underground water.
