[1][2][permanent dead link‍] A second outcropping is seen at Washington Oaks Gardens State Park in northern Flagler County, south of St. Augustine.

Coquina obtained from this formation on Anastasia Island was used to construct Castillo de San Marcos during the late 17th century; a local material, it was relatively easy to quarry and proved to be effective for absorbing cannon damage.

[6] The formation registers in the late Pleistocene with oldest samples aging at 110,000 YBP based on radiometric dating (U234/Th230).

[7] The Anastasia Formation is composed of quartz sands and calcite coquina, with sporadic instances of fossil debris.

The formation is soft to moderately hard coquina composed of whole and fragmented mollusk shells within sand often cemented by sparry calcite.