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Peneplain
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<p>In <a href="/facts/Geomorphology/MDf2I2h5">geomorphology</a> and <a href="/facts/Geology/WGvVRIYF">geology</a>, a peneplain is a <a href="/facts/Terrain/r2lduLeI">low-relief</a> <a href="/facts/Plain/yM1ghtmc">plain</a> formed by protracted <a href="/facts/Erosion/gaGJXy0W">erosion</a>. This is the definition in the broadest of terms, albeit with frequency the usage of peneplain is meant to imply the representation of a near-final (or penultimate) stage of <a href="/facts/Fluvial/nkLrSheo">fluvial</a> <a href="/facts/Erosion/gaGJXy0W">erosion</a> during times of extended <a href="/facts/Plate_tectonics/RtRG5lY4">tectonic</a> stability. Peneplains are sometimes associated with the <a href="/facts/Cycle_of_erosion/8xmXBPdo">cycle of erosion</a> theory of <a href="/facts/William_Morris_Davis/G03MAc6k">William Morris Davis</a>, but Davis and other researchers have also used the term in a purely descriptive manner without any theory or particular genesis attached. </p>