Dating Evidence for the Accretion History of Beach Ridges on Cape Canaveral and Merritt Island, Florida, USA
Rink WJ and Forrest B. 2005. Dating Evidence for the Accretion History of Beach Ridges on Cape Canaveral and Merritt Island, Florida, USA. Journal of Coastal Research (JCR). 21(5):1000-1008
Optically stimulated luminescence ages were done on beach ridge samples from the Cape Peninsula, Merritt Island and a mainland location in Brevard County, Florida. Age estimates on the peninsula ranged from 4,000 to 150 years ago, while on Merritt Island a beach ride sample yielded an age of about 43,000 years ago. The mainland sample, near Titusville, gave an age of about 8,000 years. Using the age estimates for four ridges on the Canaveral Peninsula, average land accretion rates and beach ridge accumulation rates were determined by measuring distances perpendicular to strike of the ridge sequences and counting ridges along these trends. The average ridge spacing was found to be 109 + 20 m, the average ridge accumulation rate was 80 + 8 years/ridge, and the average land accretion rate was found to be 135 + 12 m per hundred years. We suggest that the ridge accumulation rate can be used to determine storm recurrence intervals on the peninsula. The peninsula age estimates show the problems associated with radiocarbon dating of shell, which overestimates burial ages by several thousand years due to reworking of older shells into younger deposits.
- Type
- Journal Article
- Authors
- Rink, W; Forrest, B
- Units
- CANA
- Keywords
- Florida Cape Canaveral geology marine life shell deposits ridge accumulation, Merritt Island