Close-up photo of moki (moqui) marbles lining a crack in the sandstone om the ground in Harris Wash, Utah. The round stones are iron accretions formed when softer rock erodes around them. Black and white.
Close-up photo of moki (moqui) marbles lining a crack in the sandstone om the ground in Harris Wash, Utah. The round stones are iron accretions formed when softer rock erodes around them. Black and white.