Wiktionary
n. (context geology English) A desert surface that is covered with closely packed rock fragments; reg, serir.
Wikipedia
A desert pavement, also called reg (in the western Sahara), serir (eastern Sahara), gibber (in Australia), or saï (central Asia) is a desert surface covered with closely packed, interlocking angular or rounded rock fragments of pebble and cobble size. They typically top alluvial fans. Desert varnish collects on the exposed surface rocks over time.
Geologists debate the mechanics of pavement formation and their age.
Usage examples of "desert pavement".
At last they reached an area where the going was much easier because it had been scoured by the wind, leaving behind a bare stony surface that the nomads called 'desert pavement'.
These dust storms were small compared to the old global southern-summer storms, but occasionally a hard wind would tear up the desert pavement somewhere and send the dust below flying.
Under an unrelenting sun, temperatures one hundred and ten to one hundred and fifteen during the heat of the day, the landscape was still: a green and gray graveyard with fantastically shaped tombstones stretching away over the desert pavement-the flat rocky, lifeless soil.
Less than a mile beyond the river, they passed out of the flood plain up into a different landscape of tough desert pavement pocked with occasional sweeps of red-orange sand.
It was a particularly bleak part of the valley floor, a nearly flat area of desert pavement not far from a low mesa called Gebel el Fagga.