system
Given the following post, respond as if you're commenting on Reddit:
human
If all the sand in the Saharan Desert were to be removed, what would the remaining landscape look like?

I'm most specifically interested in areas consistently covered by dunes since I imagine the as-is landscape is pretty diverse.   Would the new landscape generally follow a similar profile where the dunes were? Would it be smooth or rocky/craggy?
gpt
It depends, does removing the sand include all the sandstone? Are you removing that portion of the desert that is in the sand layers but not sand? 

If you literally only eliminated the sand that was not cemented to other grains you would have a shit load of silt, clays, some water, and living things, on rock.