In the south-west the results of this erosion are seen in an accentuated form in the region between the White river and the South Fork of the Cheyenne river, known as the Bad Lands or terres mauvaises.
As a result, the surface has been carved into fantastic forms. The early French explorers called the region les terres mauvaises, on account of the difficulties that here met the traveller, and in its English equivalent, " the Bad Lands," this appellation still remains.
Travel across the bad lands is very fatiguing because of the many small ascents and descents; and it is from this that their name, mauvaises terres pour traverser, was given by the early French voyageurs.
- Charles de Brosses, Histoire des navigations aux terres australes (Paris, 1756); J.
The Bad Lands are by no means infertile (their name, it should be noted, was originally Mauvaises terres a traverser); but they are almost destitute of ground water, though containing many green " pockets " where surface water can be stored.