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raw picture sandstone outside a shop, from the Arizona-Utah border (epod)

from BBC

Canyons and cliffs in the US Southwest

canyon, fossil, Colorado Plateau

liquefaction and iron diagenesis in Navajo sandstone, Paria plateau white pocket

Cedar & Sand: White Pocket Confounds. Looking closer at the rollover structure beneath the white sandstone. Amazing.

Picture Sandstones of the Utah-Arizona Borderlands

NaturePlus: Does anyone know what this rock is?  I found it in my garden.  The circular pattern continues through the rock.  This piece is a bit bigger than a basket ball.  Most of the rock round here is sandstone