1. Gentle Dome:
* Small laccolith: A small laccolith might only create a subtle bulge in the surrounding landscape, forming a gentle dome. This dome might be covered in vegetation and barely noticeable from the ground level.
* Erosion: If the overlying rock layers are easily eroded, the dome might be more prominent and could have a central depression where the laccolith's roof has been eroded.
2. Prominent Dome:
* Large laccolith: A larger laccolith can create a very noticeable dome, often with steep slopes.
* Rock type: If the laccolith intrudes into a hard, resistant rock like granite, the dome might be very prominent and resistant to erosion.
* Exposure: Over time, erosion can expose the laccolith's edges, revealing the different rock types and creating interesting geological formations.
3. Multiple Domes:
* Complex intrusion: Sometimes, a single intrusion can create multiple laccoliths, resulting in a series of domes in a relatively small area. These domes can be aligned or arranged in a random pattern.
4. Circular Features:
* Ring dikes: In some cases, the laccolith might be surrounded by a ring dike, which is a circular intrusion of magma that forms a ring around the laccolith. This can create a circular depression or an elevated ring around the laccolith.
5. Complex Terrain:
* Erosion and uplift: Over time, erosion and uplift can create complex terrain around the laccolith, including mesas, buttes, canyons, and valleys.
Examples:
* Henry Mountains, Utah: These mountains are classic examples of laccoliths, featuring prominent domes and exposed rock layers.
* Black Hills, South Dakota: The Black Hills are a large uplifted area that contains a number of laccoliths, forming a distinctive, rounded mountain range.
* La Sal Mountains, Utah: These mountains are a series of laccoliths that rise above the surrounding desert, creating a spectacular landscape.
Overall, the surface landscape above a laccolith can be quite varied, but often features domes, circular features, and interesting geological formations.
