BPSC 47th Exam Prelims 2005 Solved Paper

Question : 81 of 150

Marks: +1, -0

A ridge, 64,000 km long and 2,000 km to 24,00 km wide, runs down the middle of the North and South Atlantic Ocean basins, into the Indian Ocean basin, that passes between Australia and Antarctica to the South Pacific Ocean basin. The ridge is –

Socotra-Lakshadweep
Pacific-Antartica ridge
Dolphin-Challenger ridge
Mid-Oceanic ridge

Validate

Solution:

Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth's tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt. The speed of spreading affects the shape of ridge

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slower spreading rates result in steep, irregular topography while faster spreading rates produce much wider profiles and more gentle slopes.

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