Explanations:The Meghalaya Plateau is a significant geographical feature in northeastern India, and it is an example of a block mountain. To understand why this is the case, we need to delve into the geological processes that form different types of mountains.
Block mountains, also known as fault-block mountains, are formed when large blocks of the Earth's crust are uplifted or dropped due to tectonic forces. These forces can cause the crust to break along faults, leading to the uplift of one block and the subsidence of another. The uplifted block forms the mountain, while the subsided block can form a valley. This process is distinct from the formation of fold mountains, which are created by the folding of rock layers due to compressional forces.
The Meghalaya Plateau is located in the northeastern part of India and is part of the larger Shillong Plateau. It is characterized by steep cliffs on one side and a gentle slope on the other, which is a typical feature of block mountains. The plateau is bounded by the Ganga-Brahmaputra valley on the north and the Bangladesh lowlands on the south. The formation of the Meghalaya Plateau is attributed to the uplift of a large block of the Earth's crust, which is consistent with the characteristics of a block mountain.
It is important to distinguish between the different types of mountains to understand the geological processes that shape the Earth's surface. Fold mountains, such as the Himalayas, are formed by the folding of rock layers due to compressional forces. Rift valleys, such as the East African Rift, are formed by the pulling apart of the Earth's crust. In contrast, block mountains are formed by the uplift of a large block of the Earth's crust, which is the case for the Meghalaya Plateau.
Understanding the geological processes that form different types of mountains is crucial for comprehending the Earth's geological history and the forces that shape its surface. The Meghalaya Plateau serves as a clear example of a block mountain, and recognizing its formation process helps in understanding the broader context of geological formations in the region.