L-801 (Hixton Silicified Sandstone): Direct collection from outcrop. Not a collection from archaeological context. Known collection procedure. Collection includes raw material, outer surface, ...
Some of the dark sandstone in an area being explored by NASA’s Curiosity Mars rover shows texture and inclined bedding structures characteristic of deposits that formed as sand dunes, then were ...
For centuries, Spanish explorers, U.S. Army troops, wagon train emigrants and railroad surveyors carved their names on a huge sandstone outcrop in what's now a national monument famed for those ...
The Curiosity rover on Mars has drilled into the Windjana sandstone, in its latest investigations of the red planet. This is the third time the drill has excavated a sample of the Martian crust for ...
EL MORRO NATIONAL MONUMENT, N.M. -- For centuries, Spanish explorers, U.S. Army troops, wagon train emigrants and railroad surveyors carved their names on a huge sandstone outcrop in what's now ...
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