wind-blown material

Later, if sufficient material accumulates and the bank is not completely destroyed at high tide, various plants colonise the sand and trap further wind-blown material.

The fills of the holes was found to be largely stone-free, these deposits are thought to be the result of the gradual accumulation of wind-blown material.

This omission may be significant at some facilities that include major emission sources that are not subject to these assessments (e.g., wind-blown material from uncovered mill tailings).

The fissure becomes filled either during the period of exposure by contemporaneous, possibly wind-blown material, or when deposition resumes, by the same material as the overlying bed.

Something is taking the wind-blown material and mildly cementing it,' said Ray Arvidson, of Washington University in St. Louis, who served as the lead scientist for the lander's robotic arm.

Researchers said the deposits may be volcanic ash from now-buried vents or nearby volcanoes, wind-blown materials eroded from rocks or ice-rich deposits formed when the spin axis of Mars tilts over.