The tectonic plates are not fixed but constantly move horizontally over the Asthenosphere as rigid units. The asthenosphere extends from about 100 km (60 miles) to about 700 km (450 miles) below Earth’s surface.It is the zone of Earth’s mantle that lies just beneath the lithosphere and is believed to be much hotter and more fluid than the lithosphere.The boundary between India and the Antarctic plate is also marked by an oceanic ridge (divergent boundary) running in roughly West to East direction and merging into the spreading site, a little south of New Zealand.It further extends along the Makrana coast of Balochistan and joins the spreading site from the Red Sea rift southeastward along the Chagos Archipelago.The Western margin follows Kirthar Mountain of Pakistan.In the east, it extends through Rakim Yoma Mountains of Myanmar towards the island arc along the Java Trench.The Indian plate includes Peninsular India and the Australian continental portions.A transform fault, in geology and oceanography is a type of fault in which two tectonic plates slide past one another.

They are found in every ocean basin on the planet and the deepest ocean trenches ring the Pacific called the “Ring of Fire''.

These are the deepest parts of the ocean and some of the deepest natural spots on Earth.

Ocean trenches are long, narrow depressions on the seafloor.Mountain Ridge: A mountain ridge refers to the chain of mountains or hills that form a continuous elevated crest for some distance.Juan De Fuca plate: South-East of North American Plate.Caroline plate: Between the Philippine and Indian plate (North of New Guinea).Philippine plate: Between the Asiatic and Pacific plate.Arabian plate: Mostly the Saudi Arabian landmass.Nazca plate: Between South America and Pacific plate.Cocos plate: Between Central America and Pacific plate.The Africa with the eastern Atlantic floor plate.The South American plate (with western Atlantic floor separated from the North American plate along the Caribbean islands).The North American plate (with western Atlantic floor separated from the South American plate along the Caribbean islands).The Antarctic (and the surrounding oceanic) plate.Young Fold Mountain ridges, oceanic trenches, and/or transform faults surround the major plates.The Earth’s lithosphere is divided into seven major and some minor plates. The Pacific plate is largely an oceanic plate whereas the Eurasian plate is a continental plate.A tectonic plate may be a continental plate or an oceanic plate, depending on which of the two occupies the larger portion of the plate.The concept of Tectonic Plates was first introduced in 1967.The lithosphere includes the crust and top mantle with its thickness range varying between 5-100 km in oceanic parts and about 200 km in the continental areas.A tectonic plate (also called lithospheric plate) is a massive, irregularly-shaped slab of solid rock, generally composed of both continental and oceanic lithosphere.Geographical Features and their Location.

Convergent boundary definition