Question
Download Solution PDFWhich of the following features is formed due to tectonic forces?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFRift valley is formed due to tectonic forces.
Rift Valley system
- Tension causes the central portion to be let down between two adjacent fault blocks forming a graben or rift valley, which will have steep walls.
- The East African Rift Valley system is the best example.
- In general, large-scale block mountains and rift valleys are due to tension rather than compression.
- A rift valley is a lowland region that forms where Earth’s tectonic plates move apart or rift.
- Rift valleys are found both on land and at the bottom of the ocean and are created by the process of seafloor spreading.
- Rift valleys differ from river valleys and glacial valleys in that they are created by tectonic activity and not the process of erosion.
- The Great Rift Valley System which stretches from the Middle East in the north to Mozambique in the south is a geologically active area.
- It features volcanoes, hot springs, geysers, and frequent earthquakes.
Block Mountains
- Block mountains may originate when the middle block moves downward or the side blocks move upward.
- A rift valley forms while the surrounding blocks stand higher as block mountains.
- U-shaped valley and Hanging valley: Glaciers form U-shaped valleys through erosion. Hanging Valleys are found high up on the sides of larger U-shaped valleys.
- Blind valley: The Blind valley is found in the karst region. Karst topography is a geological formation shaped by the dissolution of a layer or layers of soluble bedrock, usually, carbonate rock such as limestone or dolomite, but also in gypsum.
Last updated on Jul 7, 2025
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