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NPS Geodiversity Atlas—Fort Caroline National Memorial, Florida

Geodiversity refers to the full variety of natural geologic (rocks, minerals, sediments, fossils, landforms, and physical processes) and soil resources and processes that occur in the park. A product of the Geologic Resources Inventory, the NPS Geodiversity Atlas delivers information in support of education, Geoconservation, and integrated management of living (biotic) and non-living (abiotic) components of the ecosystem.

wooden gateway

Geologic Features and Processes

[Site Under Development]

Timucuan Ecological and Historic Preserve and Fort Caroline National Memorial, along with the entire state of Florida, lies on the Floridian Plateau, a physiographic section approximately 800 km (500 mi) long and 400 – 640 km (250 – 400 mi) wide. The plateau, which has existed for millions of years, includes both emergent land and submerged continental shelf. Areas on the plateau have been alternately covered by seawater and exposed as dry land many times in the past so that marine and terrestrial deposits have been deposited one on top of the other.

The surface geology of Timucuan and Fort Caroline includes:

  • Pleistocene (1.8 million years to 10,000 years ago) to Holocene (10,000 years ago to present) beach ridge and dune deposits
  • Pleistocene - Holocene undifferentiated deposits, and
  • Holocene sediments deposited in salt marsh, beach, marine, and lagoon environments.

Sedimentary rocks and undifferentiated sediments in the subsurface, to a depth of about 30 m (100 ft), include:

  • Quaternary sands, clay-rich and limestone layers from the Upper Miocene (11.6 – 5.3 million years ago) or Pliocene (5.3 – 1.8 million years ago), and
  • mixed deposits from the Upper Oligocene (28.4 – 23.0 million years ago) to Miocene Hawthorn Group.

Regional Geology

Fort Caroline National Monument is a part of the Floridian Plateau section of the Coastal Plain Physiographic Province and shares its geologic history and some characteristic geologic formations with a region that extends well beyond park boundaries.

Maps and Reports

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Fort Caroline National Memorial

National Park Service Geodiversity Atlas

The servicewide Geodiversity Atlas provides information on geoheritage and geodiversity resources and values within the National Park System. This information supports science-based geoconservation and interpretation in the NPS, as well as STEM education in schools, museums, and field camps. The NPS Geologic Resources Division and many parks work with National and International geoconservation communities to ensure that NPS abiotic resources are managed using the highest standards and best practices available.

For more information on the NPS Geodiversity Atlas, contact us.

Part of a series of articles titled National Park Service Geodiversity Atlas.

Fort Caroline National Memorial

Last updated: July 9, 2020