Wikipedia
An inselberg or monadnock is an isolated rock hill, knob, ridge, or small mountain that rises abruptly from a gently sloping or virtually level surrounding plain.
In southern and south- central Africa, a similar formation of granite is known as a koppie, an Afrikaans word ("little head") from the Dutch word kopje.
If the inselberg is dome-shaped and formed from granite or gneiss, it can also be called a bornhardt, though not all bornhardts are inselbergs.
Plains containing various inselbergs, inselberg plains, occur in various parts of the world including the interior of Angola, Namibia, Tanzania, Northern Finland and Swedish Lapland.
Usage examples of "inselberg".
Half a moon transformed the nearby inselberg, a mountain of sculpted granite boulders like the one beneath which they were camped, into a fantastic imaginary fortress.
From the empty vehicle they tracked petite footprints to the base of the inselberg, and from there climbed up and discovered the great arch.