Bornhardt

[5] The Sugarloaf Mountain of Rio de Janeiro is a typical example of this landform and is the origin of the common bornhardt nickname "sugar loaf".

Over geological time, bornhardts may degrade to form other landforms such as nubbins (or knolls) and castle koppies.

[7] Bornhardts were previously thought of as characteristically tropical landforms, but have been shown to be more related to lithology and rock structure than climate.

Often, the underlying geological fracture pattern is shown by the surface arrangement of bornhardts, as can be seen in the Kamiesberge of Namaqualand and the Everard Ranges of Central Australia.

[9] Bornhardts commonly show extensive sheet jointing (fracture systems in the rock parallel to its surface).