|Physical Features of GTM Research Reserve
- The GTM Research Reserve's coastal estuaries are bounded to
the west by Pamlico Terrace which has an elevation of 5-25
feet above sea level.
- The elevation within the GTM Research Reserve ranges from
sea level to 40 feet on the dunes within its northern component
and central regions of the Pellicer Creek Conservation Area.
- The ground of GTM Research Reserve is covered with
Holocene epoch (younger than 10,000 years) sediments
including sand, clay and shell fragments. Older limestone
from the Anastasia formation is exposed on the southern
beach in Guana River Marsh Aquatic Preserve.
- The Tolomato, Guana and Matanzas River estuaries form a
system of bar-bounded estuaries that extend south from
Jacksonville to south of Marineland in Flagler County.
- The Guana River estuary runs parallel to the Tolomato
Matanzas estuary on the seaward side with the two lagoons
joining just north of St. Augustine Inlet. Oceanic exchange
occurs at the St. Augustine Inlet and St. Johns Inlet.
- The Matanzas River estuary extends 20 miles south from
the St. Augustine Inlet to about 8 miles south of the
Matanzas Inlet. These inlets form the oceanic exchange for
the estuarine ecosystem.
- The St. Augustine Inlet has been stabilized with north
and south jetties.
- Matanzas Inlet is one of the last natural inlets on
Florida's east coast. It has no dredged channel and little
armoring along its southern shoreline.
- Two aquifers are found around GTM Research Reserve - a
shallow aquifer recharged by rainwater and the Floridan
aquifer which is highly mineralized.
- A submarine spring is off the coast of Crescent Beach,
near Pellicer Creek Aquatic Preserve.
Geomorphology of the watershed of the
GTM Research Reserve watershed
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April 06, 2015
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