Refinement of the 2,000--1,500 BP higher-than-present sea-level event in southwest Florida
Conference
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· Geological Society of America, Abstracts with Programs; (United States)
OSTI ID:6077428
- Univ. of Florida, Gainesville, FL (United States). Florida Museum of Natural History
- Tennessee Technology Univ., Cookeville, TN (United States). Dept. of Earth Sciences
The crests of beach ridges deposited on Sanibel and La Costa Islands during the 2,000--1,500 BP interval are elevated 90 to 150 cm above the crests of historic beach ridges formed over the past 100 years. These elevated swash zone deposits record a sea-level position of perhaps +1 meter MSL. The stratigraphy of the Solana Site estuarine midden at the head of Charlotte Harbor independently suggests that sea level about 1,600 years BP also has higher than present, at least by as much as 50 cm. Newly documented stratigraphic sequences at the Wightman Site on Sanibel Island and the Pineland Site on Pine Island for the 2,000--1,500 BP time period are similar to each other in that they exhibit a natural sand event sandwiched between two human occupational episodes. At Wightman, the lower midden dates to 1,510 [plus minus] 70 BP and the upper midden to 1,290 [plus minus] 60 BP. At Pineland, the lower midden dates to 1,760 [plus minus] 60 and the upper midden dates to 1,430 [plus minus] 50 BP. The natural sand layer at Wightman is 55--125 cm MSL and at Pineland it is 40--100 cm MSL. In southwest Florida, independent archeologic and geologic evidence document a 1,500 BP, higher-than-present, sea-level event that reached at least one meter above present-day MSL.
- OSTI ID:
- 6077428
- Report Number(s):
- CONF-9304188--
- Conference Information:
- Journal Name: Geological Society of America, Abstracts with Programs; (United States) Journal Volume: 25:4
- Country of Publication:
- United States
- Language:
- English
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