This dataset contains visual core descriptions and smear slide results. See Expedition UT-GOM2-2 Methods: Lithostratigraphy (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.Additional data you might expect to find in this dataset can instead be found at the following locations:Section depths can be found in the Curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Section-piece log”, core processing code “Conv.” for all conventional and conventionalized core, “QD” for quantitatively degassed pressure core, and “CRYO” for cryogenically frozen and depressurized pressure core sections. All these sections were described, and the working half was sampled. Photos of cores after sampling the working halves can be found in the core image dataset (http://doi.org/10.5281/zenodo.14261688)Smear slide sample depths can be found in the Curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Sample-measurement log”, sample code “SMS” for smear slide.Summarized final core descriptions, including smear slide sediment names, were compiled using the software Strater. These Strater plots can be found in Appendix D, of Expedition UT-GOM2-2 Site H (Flemings et al., 2025b, https://doi.org/10.5281/zenodo.13971276).

This dataset contains total carbon, total organic carbon, total nitrogen, total sulfur, and calcium carbonate* elemental analysis data of sediment samples from whole round cores. Sample were measured at the University of New Hampshire using an Elementar Unicube CHNS elemental analyzer. See Expedition UT-GOM2-2 Methods: Sediment Geochemistry (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.Additional data you might expect to find in this dataset can instead be found at the following locations:All measurements presented were made on the resulting interstitial water whole round (IWR) squeeze cakes after pore water extraction.  The pore water sample depths can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Section-piece log”, sample codes “IWR” for regular pore water/ interstitial waters whole rounds. Additional discrete samples were also acquired but not measured during the expedition. See tab “Sample-measurement log”, sample code “CNS”.*Bulk sediment total inorganic carbon (TIC) was calculated by difference where TIC (total inorganic carbon) = TC-TOC).   CaCO3 weight percents were calculated by multiplying the IC weight percentages (IC = TC-TOC) by 8.33 to account for the non‑carbon mass fraction.

This dataset contains conventional coring deployment data from Geotek Advanced Piston Coring Tool (G-APC, code H) and the Geotek Extended Core Barrel (G-XCB, code X) coring deployments including G-APC Firing Pressure, G-APC offset, G-APC shear pin information, G-APC Speed control valve settings, core interval, and recovery. Core processing data on handwritten core curation sheets with core section depths, sample designations, void gas depths and raw hand vane and pocket penetrometer measurements. See Expedition UT-GOM2-2 Methods: Conventional Coring Tools, and Conventional Coring Results (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.Additional data you might expect to find in this dataset can instead be found at the following locations:Pressure coring deployment data can be found in the pressure coring dataset (http://doi.org/10.5281/zenodo.14104224).Logs of coring data and acquired cores can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). For coring logs, download the files GoM2-2 H003 AS DRILLED.pdf and GoM2-2 H002 AS DRILLED v1.pdf.  For the core log, download file UT-GOM2-2 CORE LOG depths – sortable.xlsx. See tab “Core type”, “H” for G-APC and “X” for G-XCB conventional cores.Cut sections, gas sample depths, and measurement depths are also archived in the curation dataset (http://doi.org/10.5281/zenodo.14926309).Void gas composition can be found in the gas geochemistry dataset (https://doi.org/10.5281/zenodo.15626975). Hand vane and pocket penetrometer measurements can also be found in the undrained strength dataset (http://doi.org/10.5281/zenodo.14107263).

This dataset contains conventional coring deployment data from Geotek Advanced Piston Coring Tool (G-APC, code H) and the Geotek Extended Core Barrel (G-XCB, code X) coring deployments including G-APC Firing Pressure, G-APC offset, G-APC shear pin information, G-APC Speed control valve settings, core interval, and recovery. Core processing data on handwritten core curation sheets with core section depths, sample designations, void gas depths and raw hand vane and pocket penetrometer measurements. See Expedition UT-GOM2-2 Methods: Conventional Coring Tools, and Conventional Coring Results (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.Additional data you might expect to find in this dataset can instead be found at the following locations:Pressure coring deployment data can be found in the pressure coring dataset (http://doi.org/10.5281/zenodo.14104224).Logs of coring data and acquired cores can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). For coring logs, download the files GoM2-2 H003 AS DRILLED.pdf and GoM2-2 H002 AS DRILLED v1.pdf.  For the core log, download file UT-GOM2-2 CORE LOG depths – sortable.xlsx. See tab “Core type”, “H” for G-APC and “X” for G-XCB conventional cores.Cut sections, gas sample depths, and measurement depths are also archived in the curation dataset (http://doi.org/10.5281/zenodo.14926309).Void gas composition can be found in the gas geochemistry dataset (https://doi.org/10.5281/zenodo.15626975). Hand vane and pocket penetrometer measurements can also be found in the undrained strength dataset (http://doi.org/10.5281/zenodo.14107263).

This dataset contains visual core descriptions and smear slide results. See Expedition UT-GOM2-2 Methods: Lithostratigraphy (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.Additional data you might expect to find in this dataset can instead be found at the following locations:Section depths can be found in the Curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Section-piece log”, core processing code “Conv.” for all conventional and conventionalized core, “QD” for quantitatively degassed pressure core, and “CRYO” for cryogenically frozen and depressurized pressure core sections. All these sections were described, and the working half was sampled. Photos of cores after sampling the working halves can be found in the core image dataset (http://doi.org/10.5281/zenodo.14261688)Smear slide sample depths can be found in the Curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Sample-measurement log”, sample code “SMS” for smear slide.Summarized final core descriptions, including smear slide sediment names, were compiled using the software Strater. These Strater plots can be found in Appendix D, of Expedition UT-GOM2-2 Site H (Flemings et al., 2025b, https://doi.org/10.5281/zenodo.13971276).

This dataset contains visual core descriptions and smear slide results. See Expedition UT-GOM2-2 Methods: Lithostratigraphy (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.Additional data you might expect to find in this dataset can instead be found at the following locations:Section depths can be found in the Curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Section-piece log”, core processing code “Conv.” for all conventional and conventionalized core, “QD” for quantitatively degassed pressure core, and “CRYO” for cryogenically frozen and depressurized pressure core sections. All these sections were described, and the working half was sampled. Photos of cores after sampling the working halves can be found in the core image dataset (http://doi.org/10.5281/zenodo.14261688)Smear slide sample depths can be found in the Curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Sample-measurement log”, sample code “SMS” for smear slide.Summarized final core descriptions, including smear slide sediment names, were compiled using the software Strater. These Strater plots can be found in Appendix D, of Expedition UT-GOM2-2 Site H (Flemings et al., 2025b, https://doi.org/10.5281/zenodo.13971276).

This dataset contains total carbon, total organic carbon, total nitrogen, total sulfur, and calcium carbonate* elemental analysis data of sediment samples from whole round cores. Sample were measured at the University of New Hampshire using an Elementar Unicube CHNS elemental analyzer. See Expedition UT-GOM2-2 Methods: Sediment Geochemistry (Flemings et al., 2025a, https://doi.org/10.5281/zenodo.13971228).The attached readme file, previewed below, describes all the data files in this dataset and their contents. The readme file also contains links to where the data is presented in the expedition proceedings.Additional data you might expect to find in this dataset can instead be found at the following locations:All measurements presented were made on the resulting interstitial water whole round (IWR) squeeze cakes after pore water extraction.  The pore water sample depths can be found in the curation dataset (http://doi.org/10.5281/zenodo.14926309). Download the file UT-GOM2-2 CORE LOG depths – sortable.xlsx, see tab “Section-piece log”, sample codes “IWR” for regular pore water/ interstitial waters whole rounds. Additional discrete samples were also acquired but not measured during the expedition. See tab “Sample-measurement log”, sample code “CNS”.*Bulk sediment total inorganic carbon (TIC) was calculated by difference where TIC (total inorganic carbon) = TC-TOC).   CaCO3 weight percents were calculated by multiplying the IC weight percentages (IC = TC-TOC) by 8.33 to account for the non‑carbon mass fraction.

Collection of line scan images from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). The offshore phase of this expedition took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan. Images were obtained during the onshore phase of the expedition, which took place between 2022-02-14 – 2022-03-15 onboard D/V Chikyu. After longitudinal splitting high-resolution (100 pixels/cm) images of each core sections archive half was captured using the Tri-Sensor Core Logger (TSCL; NS Design). The camera provides a 16-bit red-green-blue color (48-bit) TIFF file, which were converted to JPG files for publication purposes. The RGB data derived from each image for each section are published under titles "Color data (RGB) of IODP Hole 386-M0088D".For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023

Collection of line scan images from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). The offshore phase of this expedition took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan. Images were obtained during the onshore phase of the expedition, which took place between 2022-02-14 – 2022-03-15 onboard D/V Chikyu. After longitudinal splitting high-resolution (100 pixels/cm) images of each core sections archive half was captured using the Tri-Sensor Core Logger (TSCL; NS Design). The camera provides a 16-bit red-green-blue color (48-bit) TIFF file, which were converted to JPG files for publication purposes. The RGB data derived from each image for each section are published under titles "Color data (RGB) of IODP Hole 386-M0090D".For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023

Collection of line scan images from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). The offshore phase of this expedition took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan. Images were obtained during the onshore phase of the expedition, which took place between 2022-02-14 – 2022-03-15 onboard D/V Chikyu. After longitudinal splitting high-resolution (100 pixels/cm) images of each core sections archive half was captured using the Tri-Sensor Core Logger (TSCL; NS Design). The camera provides a 16-bit red-green-blue color (48-bit) TIFF file, which were converted to JPG files for publication purposes. The RGB data derived from each image for each section are published under titles "Color data (RGB) of IODP Hole 386-M0091A".For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023