high Atlantic native Hippenstee

Core/Site name:

Folly Island, South Carolina

Country/Region:

USA

Archive:

marine sediments (downcore)

Species:

Foraminifera

Proxy measurement:

Foraminiferal abundance

Sampling resolution:

seasonal

Startyear:

4KYrBP

Endyear:

Present

Description:

Micropaleontological analysis of four vibracores from back-barrier marshes of Folly Island, South Carolina, detected intervals of storm-deposited sediment. Individual washover intervals were not detectable from lithology alone, but only in conjunction with associated foraminifera. Washovers contained more modern offshore and Oligo-Miocene genera and total calcareous foraminifera than 'background' marsh samples. The presence of Tertiary foraminifera in the back-barrier cores from Folly Island supports the hypothesis that much of the sediment for barrier island migration is derived from offshore. Foraminiferal analyses of back-barrier cores were also used to calculate relative bioturbation rates by the method of Officer and Lynch [Officer, C.B., Lynch, D.R., 1983. Mixing, sedimentation rates and age dating for sediment cores. Mar. Geol. 46, 261–278, eqs. 10–14]. In all cores, the current depositional environment correlated well with the expected mixing parameter (G): the highest mixing parameter (greatest signal attenuation) was recorded in a core from a low-marsh/creek-side environment whereas the lowest mixing parameter (least smearing of signal) was recorded in a high-marsh core.

Data entered by name:

Adhikari Basanta Raj

Data entered by email:

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Main reference(s):

Hippensteel, S.P. and R.E. Martin. 1999.Foraminifera as an Indicator of Overwash Deposits, Barrier Island Sediment Supply, and Barrier Island Evolution, Folly Island, South Carolina. Palaeogeography, Palaeoclimatology, Palaeoecology, Vol. 149, pp. 115-125.doi: 10.1016/S0031-0182(98)00196-5

Link to reference 1:

http://www.sciencedirect.com/science/article/pii/S0031018298001965

Data storage link 1:

ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hippensteel1999/hippensteel1999.txt

Current dating method:

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Annual snow acc rate:

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Category: Ocean2k