The formation of 'tors' on small rocky hills is associated with which

The formation of ‘tors’ on small rocky hills is associated with which among the following?

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Granite

Limestone

Alluvial

Dolomite

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UPSC NDA-2 – 2022

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Tors are distinctive rock landforms that consist of outcrops of bedrock weathered into piles of rounded boulders. They are typically formed in areas underlain by igneous rocks, most commonly granite. The formation process involves the intersection of joint patterns in the granite bedrock, followed by subsurface weathering (like hydrolysis) along these joints and subsequent erosion of the weathered material, leaving the unweathered core stones exposed as tors.

Granite, being susceptible to weathering along its natural joint systems and through chemical processes like hydrolysis, provides the ideal conditions for the development of tors.

While tors are most characteristic of granite, similar landforms can occasionally develop on other jointed rock types like dolerite, but they are overwhelmingly associated with granitic landscapes. Limestone and dolomite typically form karst topography through dissolution, and alluvial deposits are unconsolidated sediments, neither of which forms tors.

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