This appears to be a close-up of a tabby surface. Tabby is a type concrete made from sand, lime, and shell. Large oyster shells are visible. The fort is a National Monument, and is listed on the National Register of Historic Places.Galleries:Castillo de San Marcos, Forts and Fortifications, St. Augustine, St. JohnsKeywords:castillo de san marcos, fort marion, oyster shells, saint augustine, st. augustine, tabbyPhoto Location: St. Augustine, FloridaPhotographer: Dr. Roy WinkelmanDate of Photo: 10/08/2011Device Make: CanonDevice Model: Canon EOS 5D Mark IIExposure Time: 0.0166667F Number: 6.3Original Dimensions: 5616×3744Picture Orientation: LandscapeGPS Coordinates: 29°53'52.65"N 81°18'43.88"WPicture Number: 25098
WARNING: You are about to download a 60.2 MB TIFF!
Normally such a large file is only needed for high quality printing purposes. If you are certain that you need such a large file, click the DOWNLOAD button to begin.
If you do not wish to download the large TIFF, just click the × in the top right-hand corner to close this alert.