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Supporting dataset for the paper: Does load-induced shallow subsidence inhibit delta growth?

dataset
posted on 31.03.2021, 11:09 by Liz ChamberlainLiz Chamberlain, Zhixiong Shen, Wonsuck Kim, Torbjorn Tornqvist, Samantha McKinley, Sage Anderson
This is the supporting dataset for “Chamberlain, E.L., Shen, Z., Kim, W., Törnqvist, T.E., McKinley, S., & Anderson, S. Does load-induced shallow subsidence inhibit delta growth? In prep for Journal of Geophysical Research - Earth Surface”. Estimated submission date: March, 2021.

The dataset includes stratigraphic information for boreholes of ten cross sections that were hand drilled from 2013-2015 CE in the bayhead region of the Lafourche subdelta, Mississippi Delta, USA. The study area spans ~6000 km2 and the cross sections are located near distributary channels. Data herein describe the location, surface elevation, and depth of each borehole as well as the depth relative to the surface of the mouth-bar to overbank (M-O) boundary and OSL ages for the mouth-bar deposits.

We used these data to estimate centennial- to millennial-timescale cumulative subsidence and subsidence rates of a buried stratigraphic horizon, the M-O boundary, as detailed in the associated publication. Subsidence calculation methods are presented in the dataset, and subsidence data obtained from peat-top elevations at a relatively inland site (Paincourtville, LA, USA) are presented for comparison.

History

Publisher

4TU.ResearchData

Time coverage

Data were collected 2013 – 2015 CE and reflect subsidence values averaged over the past 1600 to 750 years.

Geolocation

Bayhead region of the Lafourche subdelta, Mississippi Delta, USA.

Organizations

Soil Geography and Landscape Group and Netherlands Centre for Luminescence dating, Wageningen University & Research