how does the deccan plateau have basault -igneous rock?when there are no active volcanoes on india's mainland?
Answers
Answer:
The Deccan plateau is interesting to geologists. The deccan plateau have basalt -igneous rock because it was formed by lava flows. Millions of years ago, melted rock (lava) erupted from beneath the Earth's surface and spilled out over the ground.
There are no active volcanoes on India's mainland because in the Himalayas, a continental plate is pushed under a continental plate, while in the ring of fire, oceanic plates are submerged. These are much heavier and sink deeper, thus melt easier. The composition of the material, including a lot of water, then makes the molten surface of the submerged oceanic plate rather 'volatile' (for the lack of a better word), so it ascends and forms volcanoes. Continental crust is pushed rather flat under the upper continental crust since both crusts have a rather light density, so the surface is not heated up as much and does not sear through the layers above.
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Answer:
The Deccan plateau is interesting to geologists. The deccan plateau have basalt -igneous rock because it was formed by lava flows. Millions of years ago, melted rock (lava) erupted from beneath the Earth's surface and spilled out over the ground.
There are no active volcanoes on India's mainland because in the Himalayas, a continental plate is pushed under a continental plate, while in the ring of fire, oceanic plates are submerged. These are much heavier and sink deeper, thus melt easier. The composition of the material, including a lot of water, then makes the molten surface of the submerged oceanic plate rather 'volatile' (for the lack of a better word), so it ascends and forms volcanoes. Continental crust is pushed rather flat under the upper continental crust since both crusts have a rather light density, so the surface is not heated up as much and does not sear through the layers above.
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