How Is a Laccolith Formed?
Quick Answer
A laccolith is a geological structure that forms when magma pushes through layers of rock above it and pools in a dome shape. Laccoliths are characterized by their shape, as they are typically flat on the bottom and rounded or dome shaped on top. These structures are also called plutonic formations or igneous intrusions, which are related to sills.
Continue Reading
Full Answer
Laccoliths are usually fairly small and are less than 10 miles in diameter. Their thickness usually varies between a few hundred meters and a few thousand meters. The rocks found in laccoliths are typically more acidic than basic.
Laccoliths can be exposed slowly over time as the layers above them fragment and wear away. Colorado has many laccoliths, and they were first named in Colorado. However, one of the most famous laccoliths is located in the Henry Mountains in Utah.
The formation of laccoliths can sometimes have an effect on the surrounding rocks because of the heat of the magma that forms these structures. One of the best areas in Colorado for viewing laccoliths is also notable for its high-quality anthracite coal, which was changed from bituminous coal when laccoliths formed. In addition, laccoliths transformed limestone into marble in another area of Colorado.
Learn more about GeologyRelated Questions
-
Q:
What Is Obsidian Rock?
A: Obsidian is a type of igneous rock created when felsic magma cools and hardens before it can form a crystalline structure. It is characterized by its smoot... Full Answer >Filed Under: -
Q:
How Is Rock Gypsum Formed?
A: According to Georgia Southwestern State University, rock gypsum is formed by the evaporation of concentrated solutions like seawater. It is a chemical prec... Full Answer >Filed Under: -
Q:
In Geology, What Is the Principle of Superposition?
A: The principle of superposition in geology states that rock forms horizontally, with the oldest layers of rock lying at the bottom of a formation and newer ... Full Answer >Filed Under: -
Q:
What Is Exfoliation Geology?
A: Exfoliation geology is a type of rock weathering where the rock's layers peel off in whole sheets instead of grain by grain. Large-scale exfoliation occurs... Full Answer >Filed Under:
