We know that Earthquake is an important issue nowadays.For the movement of plate tectonics, the plate tectonic collide with each other and then the earthquake occurred. The collision of the plate tectonics is not only the responsibility for the earthquake, but it controls another geological process inside the earthquake. Like the formation of the sedimentary basin, movement of the magma inside the earth, formation structure inside the earth.

The Bengal Basin has created from the collision of the Indian plate and the Asian plate. According to the plate tectonic theory, the eastern part of Bangladesh (Bogra - Rangpur-Dinajpur area) was initially connected with Indian Landmass, with Antarctica, with Australia and another vast continent that called Gondwanaland. About 11o million years ago, the Gondwana continent starts to break up. The Indian landmass came close to the Asian plate.

The stages beginning in the Eocene (55 million years ago), Indian plate and Asian plate collide with each other and then proto-Himalayas was created. By late Eocene stage (40 million years ago), the newly hard collision between two plates and subduction was taking place and rise of the Himalayas mountain in the northern end. During the Miocene stage (5 – 25 million years ago), the accelerated rate of erosion of the Himalayas mountain was increased, and its deposit in the foot of the mountain results in Bengal Basin. This resulted in a  high rate of delta outbuilding and thick deposition of sedimentary layers in the basin which was subsiding at the same time in response to the above. It was during this time the remaining landmass of Bangladesh as we know it as the Ganges-Brahmaputra delta formed.

In the simple word the Bengal plain and the Bay of Bengal in the geologic fracture will no longer exist in the present form, but rather will be transformed into the folded mountain.

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Xalis