Ecuador and the Galápagos, July 23 - August 7, 2007 / 20070805w_FernandinaPuntaEspinosa_ShellGravel Ruth Milner, rmilner plus web at bookofmarvels dot net 12/21/2007

Shell "gravel", Punta Espinosa Although it looks at first glance like gravel we were walking on, closer inspection reveals that it's made up of myriad tiny sea shells and an incredible quantity of pencil sea urchin spines.