caliche

• White mentions that you don't find the South on interstates, but rather on the pigtrails and logging roads that cut through the trees, along natural red clay and hauled-in caliche gravel tracks that wind with the shape of creeks and rivers, and tire ruts that cut across floodplains. —  GreenCine Daily
• Broken walls formed by irregular stone blocks are held together with an ancient mortar made of clay, caliche and soil. —  azcentral.com | news
• The tangible effects of that half-million seem scant: a thin layer of black dirt seeded with grass has been spread to cover the white caliche and slow erosion, and a pitiful line of oak and ash trees has been planted atop a levee at the far end of the property. —  Dallas Observer | Complete Issue
• Massive blocks of limestone-$300,000 worth-line the caliche roads crisscrossing the property. —  The Texas Observer: In the Current Issue
• Some areas have more clay than sand -- not caliche clay, but what they refer to colloquially as —  eHam.net News

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