Here's a breakdown:

* Laccolith: A lens-shaped intrusion of magma that forces its way between layers of sedimentary rock, pushing the overlying strata upward. This creates a dome-shaped structure on the surface.

Key characteristics of a laccolith:

* Shape: Lens-shaped, often with a flat base and a domed top.

* Formation: Magma injected horizontally into existing rock layers, causing uplift.

* Size: Can range from a few meters to several kilometers in diameter.

* Examples: Many laccoliths are found in the Henry Mountains of Utah, USA.

Let me know if you'd like to explore other types of igneous intrusions!