The Anastasia Formation is composed of Pleistocene interbedded sands and coquinoid limestones. The most recognized form of the Anastasia is an orangish brown coquina consisting of whole and fragmented mollusk shells in a matrix of sand, cemented by calcite. Coquina has been used as a building stone in Florida for over 400 years. It is found at land surface along the east coast from St. Johns to Palm Beach Counties, and may occur up to twenty miles inland from the coast in the subsurface. Excellent exposures occur at Washington Oaks State Park, in Flagler County, at the House of Refuge on Hutchinson Island in Martin County, at Blowing Rocks Preserve in Palm Beach County, and along Country Club Road in Palm Beach County.