Lake Okeechobee Valley and the Everglades. The trough is underlain by clay deposits that compacted more than the limestone and sand deposits did along both coasts of peninsular Florida. Until about 6,000 years ago, the trough was dry land. As the sea level rose, the water table in Florida also rose and rainfall increased. From 6,000 to 4,000 years ago, wetlands formed building up peat deposits. Eventually the water flow into the area created a lake, drowning the wetlands. Along what is now the southern edge of the lake, the wetlands built up the layers of peat rapidly enough (reaching thick) to
West Palm Beach, Florida Palm Beach is located approximately north of Downtown Miami. The beginning of the historic period in south Florida is marked by Juan Ponce de León's first contact with native people in 1513. Europeans found a thriving native population, which they categorized into separate tribes: the Mayaimi in the Lake Okeechobee Basin and the Jaega and Ais people in the East Okeechobee area and on the east coast north of the Tequesta. When the Spanish arrived, there were perhaps about 20,000 Native Americans in south Florida. By 1763, when the English gained control of Florida, the native peoples had all but