. 8 References Fluctuating sea levels compressed numerous layers of calcium carbonate sand and shells the resulting permeable limestone formations that developed between 25 million and 70 million years ago created the Floridan Aquifer which serves as the main source of fresh water for the northern portion of Florida However this aquifer lies beneath thousands of feet of impermeable sedimentary rock from Lake Okeechobee to the southern tip of the peninsula. 1992 39.0% 2,072,698 40.9% 2,173,310 See also: List of mayors of Miami! In 1992 Hurricane Andrew caused more than $20 billion in damage just south of the Miami-Dade area.
. Overview Pacific Islander or Native Hawaiian 0.0% 0.0% 0.1% In a tropical hardwood hammock trees are very dense and diverse Metrorail:.
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