Unraveling tectonic evolution of Greater Maldivian Ridge
A recent study on the tectonic evolution of the Greater Maldivian Ridge (GMR) has given information about the tectonic evolution of the Greater Maldivian Ridge (GMR) and its nature.
- This information has shed light on the fragmentation and expansion of Gondwanaland.
- GMR is an Aseismic Ridge. It is not related to seismic activities. It is located in the western Indian Ocean to the south-west of India.
- According to this study, the GMR is likely to be under the oceanic crust. Also, it has been pointed out that the Maldives Ridge may have formed near the mid-ocean ridge.
- The mid-oceanic ridge system is a continuous chain of underwater volcanoes. It extends over an area of about 65,000 km across the globe.
Significance of study:
- This study will provide important information towards understanding the evolution of ocean basins.
- This can help to understand the process of fragmentation and expansion of the original Gondwanaland. It is noteworthy that the present structure of continents, continental segments etc. is the result of fragmentation and expansion of Gondwanaland.
About the formation of ridges through tectonic plates:
- In plate tectonics, Earth’s outermost layer or lithosphere (lithosphere) is made up of the crust and upper mantle. This layer is divided into large rocky plates called tectonic plates.
- Due to convective currents, the tectonic plates in the asthenosphere move relative to each other.
- Ridges are formed along the divergent plate boundaries. New ocean floor is formed at these places as the Earth’s tectonic plates spread apart.
Source – The Hindu
