Here's how it forms:

* Magma Intrusion: Molten rock (magma) pushes its way up from deep within the Earth's crust.

* Uplift: The pressure of the magma causes the overlying layers of rock to bend upward, forming a dome-shaped structure.

* Cooling and Hardening: The magma eventually cools and solidifies, often forming a core of igneous rock within the dome.

Examples of Domes:

* Black Hills, South Dakota: A classic example of a dome formed by the uplift of granite.

* Henry Mountains, Utah: A series of laccoliths (smaller domes) formed by magma intrusions.

Let me know if you have any other questions about landforms!