A desert can include a plain, a mountain, plateaus, valleys - almost any landform imaginable.
plain
All; Mountain Plain, desert plain, and bay.
plain
A plain is a large piece of flat land.
That depends entirely on the contour of the terrain.
A bajada is an alluvial plain formed at the base of a mountain by the coalescing of several alluvial fans.
a mountain desert is a mountain with a encradibly small desert beside or right in front
The Sahel is semi-arid grassland. It is not a desert nor is it a plain.
45 minutes from the city is a mountain peak called the mountain of smoke
A vast gravel desert plain covers most of central Oman, with mountain ranges along the north and southeast coasts.
There is no limit to the height of a mountain in the desert.
Desert pavement