Auxiliary Material for
Understanding subsidence in the Mississippi Delta region due to sediment, ice, and ocean loading:
Insights from geophysical modeling
Martin Wolstencroft 1 , Zhixiong Shen 2 , Torbjörn E. Törnqvist 2 , Glenn A. Milne 1 , Mark Kulp 3
1. Department of Earth Sciences, University of Ottawa, Ottawa, K1N 6N5, Ontario, Canada
2. Department of Earth and Environmental Sciences, Tulane University, 6823 St. Charles Avenue, New
Orleans, Louisiana 70118-5698, USA
3. Department of Earth and Environmental Sciences, University of New Orleans, 2000 Lakefront, New
Orleans, Louisiana 70148, USA
Journal of Geophysical Research: Solid Earth
Introduction
This Auxiliary Material contains one table with elevations and ages of cores used for the 80-ka long profile deformation that are included in file ts01.pdf.
1. ts01.pdf Location, surface elevation, and other information for cores used for long profile construction
(data from Shen et al.
[2012]).
1.1 Column “Core Name”, Core names for cores with OSL ages [Rittenour et al., 2007; Shen et al., 2012].
1.2 Column “Lat deg.”, latitude of cores in degrees.
1.3 Column “Long deg.”, longitude of cores in degrees.
1.4 Column “Surface elevation (m)”, Surface elevation relative to the North American Vertical Datum of
1988. Because of surface erosion at Selma I, Twin Oaks I and Log Cabin I, the elevations of these cores are estimated from the elevation of nearby drainage divides
1.5 Column “Loess/Holocene sediment thickness (m)”, thickness of loess or Holocene deposits overlying
MIS 5a deposits.
1.6 Column “Overbank sediment thickness (m)”, thickness of overbank sediments accumulated after the
MIS 5a channel-belt abandonment.
1.7 Column “OSL age (plus/minus 1 standard deviation) (ka)”, the OSL ages for Rondo (site 118) and
Paragould (site 92) are from Rittenour et al. [2007] and the other OSL ages are from Shen et al. [2012].
1.8 Column “Net vertical motion since ~80 ka (plus/minus 1 standard deviation) (m)”, net vertical land motion since ~80 ka at the core site as calculated using the method outlined in the Auxiliary Materials.
References
Rittenour, T. M., M. D. Blum, and R. J. Goble (2007), Fluvial evolution of the lower Mississippi River valley during the last 100 k.y. glacial cycle: Response to glaciation and sea-level change, Geol. Soc. Am.
Bull.
, 119 (5-6), 586-608, doi:10.1130/b25934.1.

Shen, Z., T. E. Törnqvist, W. J. Autin, Z. R. P. Mateo, K. M. Straub, and B. Mauz (2012), Rapid and widespread response of the Lower Mississippi River to eustatic forcing during the last glacial-interglacial cycle, Geol. Soc. Am. Bull.
, 124(5-6), 690-704, doi:10.1130/b30449.1.