The maximum depth of Lithosphere is found in the

Pacific Ocean.

Siberian Plain.

Patagonian Desert.

Himalayan Mountains.

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This question was previously asked in

UPSC NDA-1 – 2021

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The lithosphere, which comprises the Earth’s crust and the rigid upper part of the mantle, varies greatly in thickness. It is generally thinnest under oceanic ridges (around 10 km) and thickest under stable continental interiors (cratons) and mountain belts formed by continental collision, where it can exceed 150-200 km.

Continental lithosphere is generally much thicker than oceanic lithosphere. Major mountain ranges formed by collision, like the Himalayas, involve significant thickening of the crust and the underlying lithospheric mantle, leading to greater overall lithospheric depth compared to oceanic areas, plains, or deserts.

The Pacific Ocean is underlain by oceanic lithosphere, which is relatively thin compared to continental lithosphere. Siberian Plain and Patagonian Desert are continental regions, but the significant crustal root and thickened lithosphere associated with the collision forming the Himalayan mountains likely result in the maximum depth among the given options.

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