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Consider the following statements:
1. When an intrusion of molten magma is made horizontally along the bedding planes of sedimentary rocks, the resultant intrusion is called a sill.
2. Intrusions, when injected vertically as narrow walls of igneous rocks within the sedimentary layers, are termed as dykes.
Which of these statements is/are correct?
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements:1. When an intrusion of molten magm...
- Perhaps the commonest intrusive landforms are sills and dykes. When an intrusion of molten magma is made horizontally along the bedding planes of sedimentary rocks, the resultant intrusion is called a sill.
- Denudation of the overlying sedimentary strata will expose the intrusion which will resemble a lava flow, or form a bold escarpment like the Great Whin Sill of N.E. England.
- Similar intrusions when injected vertically as narrow walls of igneous rocks within the sedimentary layers are termed as dykes.
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Community Answer
Consider the following statements:1. When an intrusion of molten magm...
Statement 1: When an intrusion of molten magma is made horizontally along the bedding planes of sedimentary rocks, the resultant intrusion is called a sill.
A sill is a type of intrusive igneous rock that is formed when magma is injected horizontally into existing rock layers, following the bedding planes. The magma cools and solidifies, forming a parallel layer of igneous rock within the sedimentary rock layers. Sills are typically tabular in shape and can vary in thickness from a few centimeters to several meters. They are typically concordant, meaning they are parallel to the bedding planes of the surrounding rock.
Statement 2: Intrusions, when injected vertically as narrow walls of igneous rocks within the sedimentary layers, are termed as dykes.
A dyke, also known as a dike, is another type of intrusive igneous rock that is formed when magma is injected vertically into existing rock layers. Unlike sills, dykes cut across the bedding planes of the surrounding rock and are discordant. They form narrow, wall-like structures that can range in thickness from a few centimeters to several meters. Dykes are typically composed of coarser-grained igneous rocks compared to the surrounding rock layers.
Explanation:
Both statements 1 and 2 are correct.
- Statement 1: When molten magma is injected horizontally along the bedding planes of sedimentary rocks, it forms a sill. Sills are concordant intrusions that are characterized by their parallel orientation to the surrounding rock layers. The magma cools and solidifies within the sedimentary layers, forming a tabular layer of igneous rock.
- Statement 2: When molten magma is injected vertically as narrow walls within the sedimentary layers, it forms a dyke. Dykes are discordant intrusions that cut across the bedding planes of the surrounding rock. They are typically narrower than sills and have a wall-like appearance. Dykes are formed when the magma forces its way through fractures or cracks in the existing rock layers.
Conclusion:
Both statements 1 and 2 are correct. Sills are formed when magma is injected horizontally along the bedding planes of sedimentary rocks, while dykes are formed when magma is injected vertically as narrow walls within the sedimentary layers.
A sill is a type of intrusive igneous rock that is formed when magma is injected horizontally into existing rock layers, following the bedding planes. The magma cools and solidifies, forming a parallel layer of igneous rock within the sedimentary rock layers. Sills are typically tabular in shape and can vary in thickness from a few centimeters to several meters. They are typically concordant, meaning they are parallel to the bedding planes of the surrounding rock.
Statement 2: Intrusions, when injected vertically as narrow walls of igneous rocks within the sedimentary layers, are termed as dykes.
A dyke, also known as a dike, is another type of intrusive igneous rock that is formed when magma is injected vertically into existing rock layers. Unlike sills, dykes cut across the bedding planes of the surrounding rock and are discordant. They form narrow, wall-like structures that can range in thickness from a few centimeters to several meters. Dykes are typically composed of coarser-grained igneous rocks compared to the surrounding rock layers.
Explanation:
Both statements 1 and 2 are correct.
- Statement 1: When molten magma is injected horizontally along the bedding planes of sedimentary rocks, it forms a sill. Sills are concordant intrusions that are characterized by their parallel orientation to the surrounding rock layers. The magma cools and solidifies within the sedimentary layers, forming a tabular layer of igneous rock.
- Statement 2: When molten magma is injected vertically as narrow walls within the sedimentary layers, it forms a dyke. Dykes are discordant intrusions that cut across the bedding planes of the surrounding rock. They are typically narrower than sills and have a wall-like appearance. Dykes are formed when the magma forces its way through fractures or cracks in the existing rock layers.
Conclusion:
Both statements 1 and 2 are correct. Sills are formed when magma is injected horizontally along the bedding planes of sedimentary rocks, while dykes are formed when magma is injected vertically as narrow walls within the sedimentary layers.
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Consider the following statements:1. When an intrusion of molten magma is made horizontally along the bedding planes of sedimentary rocks, the resultant intrusion is called a sill.2. Intrusions, when injected vertically as narrow walls of igneous rocks within the sedimentary layers, are termed as dykes.Which of these statements is/are correct?a) 1 onlyb) 2 onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?
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Consider the following statements:1. When an intrusion of molten magma is made horizontally along the bedding planes of sedimentary rocks, the resultant intrusion is called a sill.2. Intrusions, when injected vertically as narrow walls of igneous rocks within the sedimentary layers, are termed as dykes.Which of these statements is/are correct?a) 1 onlyb) 2 onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements:1. When an intrusion of molten magma is made horizontally along the bedding planes of sedimentary rocks, the resultant intrusion is called a sill.2. Intrusions, when injected vertically as narrow walls of igneous rocks within the sedimentary layers, are termed as dykes.Which of these statements is/are correct?a) 1 onlyb) 2 onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:1. When an intrusion of molten magma is made horizontally along the bedding planes of sedimentary rocks, the resultant intrusion is called a sill.2. Intrusions, when injected vertically as narrow walls of igneous rocks within the sedimentary layers, are termed as dykes.Which of these statements is/are correct?a) 1 onlyb) 2 onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?.
Consider the following statements:1. When an intrusion of molten magma is made horizontally along the bedding planes of sedimentary rocks, the resultant intrusion is called a sill.2. Intrusions, when injected vertically as narrow walls of igneous rocks within the sedimentary layers, are termed as dykes.Which of these statements is/are correct?a) 1 onlyb) 2 onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements:1. When an intrusion of molten magma is made horizontally along the bedding planes of sedimentary rocks, the resultant intrusion is called a sill.2. Intrusions, when injected vertically as narrow walls of igneous rocks within the sedimentary layers, are termed as dykes.Which of these statements is/are correct?a) 1 onlyb) 2 onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:1. When an intrusion of molten magma is made horizontally along the bedding planes of sedimentary rocks, the resultant intrusion is called a sill.2. Intrusions, when injected vertically as narrow walls of igneous rocks within the sedimentary layers, are termed as dykes.Which of these statements is/are correct?a) 1 onlyb) 2 onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?.
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