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...