Additional Information for Yellow Bluff Fort Historic State Park
Area Geography
Yellow Bluff Fort Historic State Park is situated on a low sandy ridge overlooking the St. Johns River floodplain. The terrain is level to gently rolling, with elevations ranging from 5 to 20 feet above sea level. The natural topography is modified in the form of remnant earthworks associated with the Confederate fort constructed in 1862.
The geomorphology of Yellow Bluff is similar to that of Fort George Island, with Miocene, Pliocene, and Pleistocene sediments. The Pleistocene sediments are marine in origin and were exposed to weathering after the sea levels dropped following the Pleistocene’s Great Ice Age. The changes in sea levels and exposure created sand ridges such as the one seen at Yellow Bluff. The only type of soil found at Yellow Bluff is Kershaw fine sand, typical of the gently sloping, well-drained ridges and knolls found in the vicinity of the lower St. Johns River.
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