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

This is the supporting dataset for “Chamberlain, E.L., Shen, Z., Kim, W., Törnqvist, T.E., McKinley, S., &amp; Anderson, S. Does load-induced shallow subsidence inhibit delta growth? In prep for Journal of Geophysical Research - Earth Surface”. Estimated submission date: March, 2021.<br>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.<br>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.

本数据集为《Chamberlain, E.L.、Shen, Z.、Kim, W.、Törnqvist, T.E.、McKinley, S. 及 Anderson, S. 所著<负载诱发的浅部沉降是否抑制三角洲生长？>》（拟投稿于《Journal of Geophysical Research - Earth Surface》）的配套数据集，预计提交时间为2021年3月。
本数据集涵盖美国密西西比河三角洲拉福什次三角洲湾头区域2013至2015年人工钻探的10条剖面的钻孔地层信息。研究区总面积约6000平方千米，所有剖面均分布于分流河道附近。本数据集包含各钻孔的位置、地表高程、埋深，以及河口坝至岸后（Mouth-bar to Overbank，简称M-O）界面距地表的深度，还有河口坝沉积的光释光（OSL）测年数据。
依托上述数据集，我们估算了埋藏地层界面（即M-O界面）的百年至千年尺度累积沉降量与沉降速率，具体细节见关联论文。数据集内附带了沉降计算方法，同时还提供了取自美国路易斯安那州佩因库特维尔（Paincourtville, LA, USA）相对内陆位点的泥炭顶面高程沉降数据以供对比。