It is also much lower than either the outer basin floor or the farside highlands.

Originally, most of the basin floor was swampy or even rather wet.

These hills rise to heights of several hundred metres above the basin floor.

Down below, the agricultural co-op tractor snaked across the basin floor.

Movement caught Paul's attention - to his right and down on the basin floor curving out beneath them.

They were pumping water out of aquifers below the surrounding mountains onto the basin floor.

"No, the cliffs over there are still the same dusty brown, but the basin floor looks like an irrigated field in spring," Kirk said.

At least, she thought, Tezziq kept them moving, though how much real progress they were making across the basin floor was difficult to determine.

They stood presently amidst the Fremen on the basin floor.

For some 25 million years, the basin floor was covered with lakes and swamps.