1.   Close up, Mars resembled an earthly desert strewn with rocks and windblown sand.

2.   Loope, the lead author of the report, said windblown sand alone would probably not have buried any dinosaurs alive.

3.   Several times in the Holocene, for instance, great stretches of the American West have been converted by drought into expanses of windblown sand like the Sahara.

4.   Laid on a rain swept sloping dune, they were quickly buried by windblown sand and gradually turned to stone.

5.   Quickly buried by windblown sand, the preserved prints gradually turned to stone.