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With reference to the coastline of Submergence, consider the following statements:
Fiord and Ria coasts are glaciated coasts.
Depth of Fiord coast increases seaward whereas depth of Ria coast is more near the Land.
Which of the statements given above is/are correct?
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
With reference to the coastline of Submergence, consider the followin...
Coastlines of Submergence:
Ria Coast: During the Ice Age a great deal of water was locked up in ice. The warmer climate that followed melted much of the ice. Subsequently there was an increase in the waters of the oceans and the sea level rose appreciably.
In some cases it is estimated that there was a rise of almost 300 feet! In upland coastal regions where the mountains run at right angles to the sea, that is transverse or discordant to the coast, a rise in the sea level submerges or drowns the lower parts of the valleys to form long, narrow branching inlets separated by narrow headlands.
Statement 1 is incorrect. They differ from fiords in two important respects, i.e. they are not glaciated, and their depth increases seawards. A Ria coast is typical of the Atlantic type of coast like those of north-west France, north-west Spain, south-west Ireland, Devon and Cornwall. As Rias are generally backed by highland, they support few large commercial ports though they have deep water and offer sheltered anchorage. They have been
extensively used for siting fishing ports and naval bases such as Plymouth and Brest.
Fiord Coast: Fiords are submerged U-shaped glacial troughs. They mark the paths of glaciers that plunged down from the highlands. They have steep walls, often rising straight from the sea, with tributary branches joining the main inlet at right angles.
Statement 2 is incorrect. Due to the greater intensity of ice erosion fiords are deep for great distances inland but there is a shallow section at the seaward end formed by a ridge of rock and called the threshold. Off the fiord coast are numerous islands or skerries which, with the shallow thresholds, sometimes only 200 feet deep, complicate coastal navigation. Fiord coasts are almost entirely confined to the higher latitudes of the temperate regions which
were once glaciated e.g. Norway, Alaska, British Columbia, southern Chile and the South Island of New Zealand.
Some of the large fiords are extremely long and deep. For example, the Sogne Fiord of Norway is 110 miles long, 4 miles wide and almost 4,000 feet deep in its mid-channel. Despite their deep and sheltered water, few large ports are located in fiords. Their mountainous background with poor accessibility inland, attract few settlements.
Agriculture is confined to the deltaic fans, built up where streams flow down to the fjords. The few towns that exist either as fishing or market centres e.g. Trondheim, are only of local importance.
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With reference to the coastline of Submergence, consider the followin...
The correct answer is option 'D' - Neither 1 nor 2.
Explanation:
1) Fiord and Ria coasts are glaciated coasts: This statement is incorrect. Fiord and Ria coasts are not exclusively glaciated coasts.
- Fiord coast: A fiord is a long, narrow, deep inlet of the sea, formed by the submergence of a glaciated valley. Fiords are typically found in high-latitude regions, such as Norway, Alaska, and New Zealand. They are characterized by steep sides and a U-shaped cross-section.
- Ria coast: A ria is a coastal inlet formed by the partial submergence of a river valley. It occurs when sea levels rise or land sinks, allowing the sea to inundate the lower parts of the river valley. Rias are commonly found in areas with a combination of a low-lying coastline and a river system, such as Chesapeake Bay in the United States and the Ganges Delta in Bangladesh.
2) Depth of Fiord coast increases seaward whereas depth of Ria coast is more near the land: This statement is also incorrect.
- Fiord coast: The depth of a fiord coast tends to be greater near the land and decreases seaward. This is because fiords are formed by the erosion of glaciers, which carve deep valleys into the land. When the glaciers retreat and the sea level rises, these valleys become submerged, forming fiords. The depth of a fiord coast is determined by the depth of the glacial valley.
- Ria coast: The depth of a ria coast tends to be greater near the sea and decreases towards the land. This is because rias are formed by the partial submergence of a river valley. The river valley is typically deeper near the coast, where it meets the sea. As the sea level rises, the lower parts of the river valley become inundated, forming a ria. The depth of a ria coast is determined by the depth of the river valley.
In summary, neither statement 1 nor statement 2 is correct. Fiord and Ria coasts are not exclusively glaciated coasts, and the depth patterns of fiord and ria coasts are opposite to what is stated in statement 2.
Explanation:
1) Fiord and Ria coasts are glaciated coasts: This statement is incorrect. Fiord and Ria coasts are not exclusively glaciated coasts.
- Fiord coast: A fiord is a long, narrow, deep inlet of the sea, formed by the submergence of a glaciated valley. Fiords are typically found in high-latitude regions, such as Norway, Alaska, and New Zealand. They are characterized by steep sides and a U-shaped cross-section.
- Ria coast: A ria is a coastal inlet formed by the partial submergence of a river valley. It occurs when sea levels rise or land sinks, allowing the sea to inundate the lower parts of the river valley. Rias are commonly found in areas with a combination of a low-lying coastline and a river system, such as Chesapeake Bay in the United States and the Ganges Delta in Bangladesh.
2) Depth of Fiord coast increases seaward whereas depth of Ria coast is more near the land: This statement is also incorrect.
- Fiord coast: The depth of a fiord coast tends to be greater near the land and decreases seaward. This is because fiords are formed by the erosion of glaciers, which carve deep valleys into the land. When the glaciers retreat and the sea level rises, these valleys become submerged, forming fiords. The depth of a fiord coast is determined by the depth of the glacial valley.
- Ria coast: The depth of a ria coast tends to be greater near the sea and decreases towards the land. This is because rias are formed by the partial submergence of a river valley. The river valley is typically deeper near the coast, where it meets the sea. As the sea level rises, the lower parts of the river valley become inundated, forming a ria. The depth of a ria coast is determined by the depth of the river valley.
In summary, neither statement 1 nor statement 2 is correct. Fiord and Ria coasts are not exclusively glaciated coasts, and the depth patterns of fiord and ria coasts are opposite to what is stated in statement 2.
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With reference to the coastline of Submergence, consider the following statements: Fiord and Ria coasts are glaciated coasts. Depth of Fiord coast increases seaward whereas depth of Ria coast is more near the Land. Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer?
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With reference to the coastline of Submergence, consider the following statements: Fiord and Ria coasts are glaciated coasts. Depth of Fiord coast increases seaward whereas depth of Ria coast is more near the Land. Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. 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 With reference to the coastline of Submergence, consider the following statements: Fiord and Ria coasts are glaciated coasts. Depth of Fiord coast increases seaward whereas depth of Ria coast is more near the Land. Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to the coastline of Submergence, consider the following statements: Fiord and Ria coasts are glaciated coasts. Depth of Fiord coast increases seaward whereas depth of Ria coast is more near the Land. Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer?.
With reference to the coastline of Submergence, consider the following statements: Fiord and Ria coasts are glaciated coasts. Depth of Fiord coast increases seaward whereas depth of Ria coast is more near the Land. Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. 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 With reference to the coastline of Submergence, consider the following statements: Fiord and Ria coasts are glaciated coasts. Depth of Fiord coast increases seaward whereas depth of Ria coast is more near the Land. Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to the coastline of Submergence, consider the following statements: Fiord and Ria coasts are glaciated coasts. Depth of Fiord coast increases seaward whereas depth of Ria coast is more near the Land. Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer?.
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