A low hill at the base of a larger mountain or mountain range, forming the transitional zone between the flat lowland and the steep high terrain above. Foothills are typically built from the same rock sequence as the range they border, uplifted and eroded to a gentler relief than the peaks behind them.
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Adjacent To
Source Foothills (Wikipedia)
Sources
Foothills (Wikipedia)
Lead, second sentence
They are a transition zone between plains and low relief hills and the adjacent topographically higher mountains, hills, and uplands.
Lead, third sentence
Frequently foothills consist of alluvial fans, coalesced alluvial fans, and dissected plateaus.
Adjacent To: Mountain Range, Lead, first sentence
Foothills or piedmont are geographically defined as gradual increases in elevation at the base of a mountain range, higher hill range or an upland area.
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