News tagged with plate tectonics

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Earthquake waves: How do they spread?

Propagation of earthquake waves within the Earth is not uniform. Experiments indicate that the velocity of shear waves (s-waves) in Earth’s lower mantle between 660 and 2900 km depth is strongly dependent on the orientation ...

Apr 13, 2009 3.7 / 5 (3) 0

Beneath the surface

It was the geological collision between India and Asia millions of years ago that created one of the world's most distinctive places: The area around Lake Baikal in Siberia, which contains 20 per cent of the world's fresh ...

Feb 11, 2009 5 / 5 (6) 0

Half-baked asteroids have Earth-like crust

Asteroids are hunks of rock that orbit in the outer reaches of space, and scientists have generally assumed that their small size limited the types of rock that could form in their crusts. But two newly discovered ...

Jan 07, 2009 4.7 / 5 (3) 2