A field of dark rippled sand on the side of Columbia Hills is named El Dorado.

The ancestor was no more than a pale wormlike animal, cowering in a seabed of rippled sand.

The tide was out, the rippled sand packed hard.

Furbetrance banked steeply, made a tight turn, and glided slowly into a vertical-sided canyon whose perfectly flat floor was covered with rippled sand.

Above the breeze the sky was ridged with high white clouds, patterned like rippled sand after the tide leaves a beach.

Flaser bedding can be subdivided according to how the mud is deposited over the rippled sand.

If the oddly rippled sand represented the area of the crater, then it was more than a kilometer across.

He had been pushing forward around the rippled sand that betrayed the dust-drowned crater.

A dozen paces to his right the rippled sand began.

Joanna was pulled off her feet and began moving toward Jamie, dangling in the harness, her boots trailing bare centimeters above the rippled sand.