Galapagos Island
Galapagos beaches have a characteristic mixture of light and dark sand grains reflecting its geological origin and abundant aquatic marine life, including worn fragments of tan and reddish bivalve chards...
LaSerena, Bay of Coquimbo
White and tan marine shell fragments and gray and black intrusive igneous rock show the terrestrial and marine components of a LaSerena coastal beach...
Lima, Peru
This sand is a mixture of clear quartz grains, light yellow-tan rounded feldspar grains with some right angle edges, and darker greenish-gray metamorphic sand grains...
Punta del Este, Uruguay
The thick tan sand is derived primarily from igneous and highly folded metamorphic rock and includes quartz and reddish-tan alkali feldspar. Smoothly rounded sand grains...