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A survey found hundreds of places along the coast which flows into the Gulf, including many under water in the Gulf. The authors of that study estimated that the discharge from the identified inland sources is equivalent to that of one 1st-magnitude spring for every 2 miles (3.2 km) of coast.
At 345 feet (105 m) above mean sea level, Britton Hill in northern Walton County is the highest point in Florida and the lowest known highpoint of any U.S. state. [3] Much of the state south of Orlando is low-lying and fairly level; however, some places, such as Clearwater, feature vistas that rise 50 to 100 feet (15 to 30 m) above the water.
The emergent portion of the platform was created during the Eocene to Oligocene as the Gulf Trough filled with silts, clays, and sands. Flora and fauna began appearing during the Miocene. No land animals were present in Florida prior to the Miocene. The largest deposits of rock phosphate in the United States are found in Florida. [1]
Gulf Islands National Seashore geologic cross section. The barrier islands started forming 4500-5400 years ago. On the north side of the islands, the beaches are broad, while on the south side, the beaches include 2 metres (6.6 ft) high dunes on average, but with some reaching 6 metres (20 ft).
The peninsular coast of the US state of Florida is formed from contact with three main large bodies of water: the open Atlantic Ocean to the east, the Caribbean Sea to the south, and the Gulf of Mexico to the West (making part of the larger Gulf Coast of the United States).
The Forgotten Coast is a trademark first used by the Apalachicola Bay Chamber of Commerce on September 1, 1992. [1] The name is most commonly used to refer to a relatively quiet, undeveloped and sparsely populated section of coastline stretching from Mexico Beach on the Gulf of Mexico to St. Marks on Apalachee Bay in the U.S. state of Florida. [2]
The Gulf Coast climate is humid subtropical, although Southwest Florida features a tropical climate. Much of the year is warm to hot along the Gulf Coast, while the three winter months bring periods of cool (or rarely, cold) weather mixed with mild temperatures. The area is highly vulnerable to hurricanes as well as floods and severe thunderstorms.
The emergent landmass of Florida was Orange Island, a low-relief island sitting atop the carbonate Florida Platform which emerged about 34 to 28 million years ago. [7] When glaciation locked up the world's water, starting 2.58 million years ago, the sea level dropped precipitously. It was approximately 100 meters (330 ft) lower than present levels.