Main Answer:
An intrusive body that has risen through overlying rocks because it is less dense than the overlying column of rock is known as a pluton.
Step-by-step explanation:
In geological terms, a pluton refers to an igneous intrusion formed when magma, molten rock beneath the Earth's surface, pushes its way upward into the overlying rocks. This phenomenon occurs due to the buoyancy of the magma, which is less dense than the surrounding rocks. As the magma rises, it gradually cools and solidifies, creating a distinct pluton structure. The less dense nature of the magma allows it to penetrate through the overlying rocks, forming a pluton that can take various shapes and sizes.
Plutons are typically composed of granitic or basaltic rocks, depending on the composition of the original magma. The process of their formation is a testament to the dynamic nature of the Earth's crust, where geological forces constantly reshape the landscape. Intrusions like plutons offer valuable insights into the Earth's geological history, providing geologists with clues about past tectonic activities and the evolution of different rock formations.
Understanding the concept of plutons is crucial in the field of geology, helping scientists unravel the mysteries of the Earth's subsurface processes. By studying these intrusive bodies, researchers gain valuable information about the conditions and forces that have shaped the Earth over millions of years. Plutons serve as a fascinating window into the geological past, contributing to our broader understanding of the planet's dynamic and ever-changing nature.