Bright Beaches in FloridaThe white sands of Florida’s Emerald Coast beaches are primarily comprised of quartz grains from the southern Appalachian Mountains. Read the full storyCredits: ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit Download Share Tags Earth Observatory Image of the DayTakenJuly 30, 2023Image CreditISS Crew Earth Observations Facility and the Earth Science and Remote Sensing UnitSize720x480px