Which one among the following statements is *not* correct?

Which one among the following statements is *not* correct?

Shillong Plateau is an outlier of Peninsular Plateau of India
Aravalli Mountain is the oldest mountain chain of India
Vindhyans are examples of fold mountain
Rajmahal Highlands are composed of lava deposits
This question was previously asked in
UPSC CAPF – 2013
The incorrect statement is that Vindhyans are examples of fold mountains.
The Vindhyan Range is primarily composed of horizontally bedded sedimentary rocks like sandstones, shales, and limestones, belonging to the Vindhyan System, a younger part of the Purana group. These mountains are considered block mountains or residual mountains formed due to faulting, uplift, and subsequent erosion, rather than folding.
Statement A is correct; the Shillong Plateau (Meghalaya Plateau) is geologically an eastward extension of the Peninsular Plateau, separated by the Malda Gap. Statement B is correct; the Aravalli range is one of the oldest fold mountain systems in the world. Statement D is correct; the Rajmahal Highlands in eastern Jharkhand are composed of volcanic rocks (basalt) which are part of the Deccan Traps volcanic province.
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