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
Round Lake (Florida lake) Round Lake (Florida lake) Round Lake is a natural freshwater lake on the south side of Winter Haven, Florida. It is almost round in shape and has a surface area of . It is bordered on the north, east and southeast by houses in a gated community. On the south is a grass field, beyond which is Eloise Loop Road, and on the west and southwest is a citrus grove. Round Lake is about east of the south cove of Lake Winterset. This lake is swampy on much of its shore and there are ten or so minuscule islets along