A rift valley is a lowland region that forms where Earth’s tectonic plates move apart, or rift. 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, where they are created by the process of seafloor spreading.
How are rift valleys formed Class 6?
They are formed due to the collision of tectonic plates. They are formed due to the sinking of land between two river basins. They are formed due to the sinking of land between two normal faults or deep slopes.
Is a rift valley convergent or divergent?
divergent boundaries
Areas where plates are colliding form convergent boundaries, and areas where plates are expanding create divergent boundaries. Rift valleys are formed by divergent boundaries that involve continental plates.
How are rift valleys formed Class 7?
Answer: A rift valley is formed on a divergent plate boundary when a block of land between two almost parallel faults sinks down. For example, the Narmada Valley in India, lying between the Satpura and Vindhya ranges, is a rift valley.
What is a rift valley class 9?
A rift valley is a lowland region that forms where Earth’s tectonic plates move apart. When two faults occur simultaneously, the portion of a land between them may get elevated or get depressed. The depressed piece of land between two or more parallel faults is forms a rift valley.
What plate boundary causes rift valleys?
Divergent plate boundaries
Divergent plate boundaries, which are associated with the formation of rift valleys, occur when plates move away from one another. Convergent plate boundaries move toward one another, pushing into one another and are likely to create mountain ranges.
What type of boundary is a rift valley?
Many rift valleys are part of “triple junctions,” a type of divergent boundary where three tectonic plates meet at about 120° angles. Two arms of the triple junction can split to form an entire ocean.
How is a rift valley formed give one example of a rift valley?
A rift valley is formed by the submergence of a big landmass between two high block mountains, e.g. the Rhine river flows through a rift valley in its middle course.
Which is the rift valley in India?
The correct answer is The Narmada. Narmada is the largest west flowing river of peninsular India. Narmada flows westwards through a rift valley between the Vindhyan Range on the north and the Satpura Range on the south.
How are flood plains formed Class 7 short answer?
(iv) How are flood plains formed? Answer: When a river overflows its banks, it results in the flooding of the area surrounding it. When it floods, it deposits a layer of fine soil and other material called sediments. Thus, forming a fertile layer of soil called flood plains.
What are tectonic plates Class 9?
A Tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest.
Which river flows in rift valley?
The Narmada and the Tapi are the major rivers in India that flow through rift valleys.
What is a rift valley Shaalaa?
Solution. The Great Rift Valley is a long narrow valley formed as a result of vertical cracks that developed because of movements within the earth. It extends for a total distance of 5,000 km from Lake Malawi to the Red Sea and the Gulf of Aqaba to the Dead Sea in Jordan.
How are block mountains formed?
Block Mountains are formed when two tectonic plates move away from each other causing cracks on the surface of the Earth. When parallel cracks or faults occur, the strip of land or the block of land between them may be raised resulting in the formation of block mountains. The upward block is called a horst.
Which force causes rift valley?
Rifts are formed as a result of the pulling apart of the lithosphere due to extensional tectonics. The linear depression may subsequently be further deepened by the forces of erosion. More generally the valley is likely to be filled with sedimentary deposits derived from the rift flanks and the surrounding areas.
What is a rift in plate tectonics?
Rifting is defined as the splitting apart of a single tectonic plate into two or more tectonic plates separated by divergent plate boundaries. The rifting of a continental tectonic plate creates normal fault valleys, small tilted block mountains, and volcanism. The process is illustrated in Fig.
Where is the rift valley?
Eastern Africa
The Rift Valley, located in Eastern Africa, covers just over 2% of the continent and spreads over seven countries (Map 5 and Table 29). min. max. The Rift Valley consists of a group of independent interior basins, extending from Djibouti in the north to Tanzania in the south, nearly half being located in Ethiopia.
Where does rift valley start and end?
The Great Rift Valley is a series of contiguous geographic trenches, approximately 7,000 kilometres (4,300 mi) in total length, that runs from Lebanon in Asia to Mozambique in Southeast Africa.
What occurs early on in the formation of a rift?
Early in the rift formation, streams and rivers flow into the low valleys and long, narrow lakes can be created. Eventually, the widening crust along the boundary may become thin enough that a piece of the continent breaks off, forming a new tectonic plate.
How are rift valleys formed Upsc?
Rift Valleys
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.
What is a rift valley give one example?
The most extensive of the continental rift valleys are those of the East African Rift System, which extend northward to the Red Sea and eastward into the Indian Ocean. Other notable examples include the Baikal Rift Valley (Russia) and the Rhine Rift Valley (Germany).
