Consider the following intrusive forms of lava:1. Laccoliths - A large...
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Batholiths: Large dome-like structures are developed when a large body of magmatic material is cooled in the deeper depth of the crust. They cover large areas. Sometimes, these granitic bodies assume depth that may be several kilometres. A cooled portion of the magma chambers is known as batholiths.
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Laccoliths: Large dome-shaped intrusive bodies with a level base that are connected by a pipe-like channel arising from below arc known as laccoliths. It is similar to the surface volcanic domes of the composite volcano that are located at deeper depths. The domal hills of granite rocks are spotted in the plateau of Karnataka. Though now exfoliated, most of these are examples of laccoliths or batholiths.
Consider the following intrusive forms of lava:1. Laccoliths - A large...
Explanation:
Laccoliths and batholiths are both forms of intrusive igneous rock formations. However, the given descriptions of these formations are not accurate. Let's discuss each one separately:
Laccoliths:
- Laccoliths are formed when magma is injected into the crust and spreads out between existing rock layers.
- The magma pushes the overlying rock layers upward, creating a dome or mushroom-like shape.
- As the magma cools and solidifies, it forms a concordant intrusive body (meaning it follows the layering of the surrounding rocks).
- Laccoliths are typically smaller in size compared to batholiths.
Batholiths:
- Batholiths are also formed by the intrusion of magma into the crust, but they are much larger in size.
- They are characterized by their level base and lack of a pipe-like conduit.
- Batholiths represent a massive body of igneous rock that extends over a large area and is typically exposed at the surface due to erosion of the overlying rocks.
- They are also concordant intrusive bodies.
Understanding the given statements:
- The given statements incorrectly describe laccoliths as "large domes that cool in the deeper depth of the crust."
- Similarly, batholiths are inaccurately described as "large dome-shaped bodies with a pipe-like conduit from below."
- These descriptions do not match the actual definitions of laccoliths and batholiths, making the given statements incorrect.
Correct Answer:
- Based on the above explanation, the correct answer is option 'D' - None of the above, as both statements are inaccurate.