Abundant evidence supports the major contentions of the seafloor-spreading theory. First, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached, and the sediment cover is thinner near the ridge.irst, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached, and the sediment cover is thinner near the ridge.
Polk County Weather. The average temperature of Polk County is 72.96Â°F, which is higher than the Florida average temperature of 71.80Â°F and is much higher than the national average temperature of 54.45Â°F. Historical Weather. Heating Cost Index, #14.
Polk County is also home to a farm team of the Detroit Tigers and is also the Tigers' spring training headquarters. Poinciana has hot and humid summers and averages 237 days of sunshine per year.While the annual high temperature is around 91 degrees in July, it drops to a low of 41 degrees in January.oinciana also receives 51 inches of rain per year, which is higher than the national average. Poinciana, Florida, is one of the fastest growing areas in Central Florida. It has a population of 53,000 and is located southwest of Kissimmee, the county seat of Osceola County.