/* DATA DESCRIPTION: Citation: Westphal, Hildegard; Garuglieri, Elisa; Webb, Gregory E; Nothdurft, Luke; Merkel, Anna; Khanna, Pankaj; Karki, Poornima; Nohl, Theresa; Gischler, Eberhard; Webster, Jody M (2026): Scanning Electron Micrographs of biosignatures of microbial mats (IODP Expedition 389) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995587 (DOI registration in progress) Abstract: For the study of the Pleistocene reef microbialites from Hawaii, samples were examined under a scanning electron microscope (SEM) to identify microbial features allowing for biological identification. With SEM imaging of microbialite surfaces and vertical polished sections, we characterize the ultrastructure of the crusts and identify trapped and bound particles as well as any microbial remains that might allow identification of the microbes, e.g., filaments that are indicative of taxonomic determination. SEM analysis with a secondary electron (SE) detector was performed with a Teneo-VS SEM at the KAUST Imaging and Characterization Core Lab, and a Tescan Vega LMU at the ZMT Geosciences Laboratory. Keyword(s): biosignatures; Coral Reef; Hawaiian Drowned Reefs; microbialites; Pleistocene Supplement to: Westphal, Hildegard; Garuglieri, Elisa; Webb, Gregory E; Nothdurft, Luke; Merkel, Anna; Khanna, Pankaj; Karki, Poornima; Nohl, Theresa; Gischler, Eberhard; Webster, Jody M (preprint): Biosignatures of microbial mats in Pleistocene coral reef cores from IODP Expedition 389 (Hawaiian Drowned Reefs). Biogeosciences, https://doi.org/10.5194/egusphere-2026-1564 Coverage: MEDIAN LATITUDE: 20.034097 * MEDIAN LONGITUDE: -155.555962 * SOUTH-BOUND LATITUDE: 19.870311 * WEST-BOUND LONGITUDE: -156.062877 * NORTH-BOUND LATITUDE: 20.289871 * EAST-BOUND LONGITUDE: -154.954000 DATE/TIME START: 2023-09-10T00:00:00 * DATE/TIME END: 2023-10-16T00:00:00 MINIMUM ELEVATION: -415.9 m * MAXIMUM ELEVATION: -347.0 m Event(s): 389-M0097B (KAW-04Bb) * LATITUDE: 19.942109 * LONGITUDE: -156.062877 * DATE/TIME START: 2023-09-10T00:00:00 * DATE/TIME END: 2023-09-12T00:00:00 * ELEVATION: -414.6 m * LOCATION: Hawaii, USA * CAMPAIGN: Exp389 (Hawaiian Drowned Reefs (HDR)) (URI: https://doi.org/10.14379/iodp.proc.389.2025) * BASIS: MMA Valour (URI: https://store.pangaea.de/documentation/Cruise_Reports/OtherVessels/MMA_Valour.pdf) * METHOD/DEVICE: Benthic Portable Remotely Operated Drill (PROD5) * COMMENT: IGSN: IBCR0389EHI5101. Spatial reference system (SRS): 4626. Comment: LAT water depth: 414m. Washed to 34.36m. Maximum number of barrels used. 389-M0102C (KOH-01Ac) * LATITUDE: 20.289871 * LONGITUDE: -155.651009 * DATE/TIME START: 2023-10-08T00:00:00 * DATE/TIME END: 2023-10-11T00:00:00 * ELEVATION: -415.9 m * LOCATION: Hawaii, USA * CAMPAIGN: Exp389 (Hawaiian Drowned Reefs (HDR)) (URI: https://doi.org/10.14379/iodp.proc.389.2025) * BASIS: MMA Valour (URI: https://store.pangaea.de/documentation/Cruise_Reports/OtherVessels/MMA_Valour.pdf) * METHOD/DEVICE: Benthic Portable Remotely Operated Drill (PROD5) * COMMENT: IGSN: IBCR0389EHZ5101. Spatial reference system (SRS): 4326. Comment: LAT water depth: 415.5 m. Wash to 19.9m. Maximum number of barrels used. 389-M0104A (HIL-04Aa) * LATITUDE: 19.870311 * LONGITUDE: -154.954000 * DATE/TIME START: 2023-10-14T00:00:00 * DATE/TIME END: 2023-10-16T00:00:00 * ELEVATION: -347.0 m * LOCATION: Hawaii, USA * CAMPAIGN: Exp389 (Hawaiian Drowned Reefs (HDR)) (URI: https://doi.org/10.14379/iodp.proc.389.2025) * BASIS: MMA Valour (URI: https://store.pangaea.de/documentation/Cruise_Reports/OtherVessels/MMA_Valour.pdf) * METHOD/DEVICE: Benthic Portable Remotely Operated Drill (PROD5) * COMMENT: IGSN: IBCR0389EH16101. Spatial reference system (SRS): 4326. Comment: LAT water depth: 346.6m. Borehole terminated as per client request. Parameter(s): Event label (Event) * PI: Westphal, Hildegard (https://orcid.org/0000-0001-7324-6122, hildegard.westphal@leibniz-zmt.de) Sample code/label (Sample label) * PI: Westphal, Hildegard (https://orcid.org/0000-0001-7324-6122, hildegard.westphal@leibniz-zmt.de) * METHOD/DEVICE: DSDP/ODP/IODP sample designation (URI: hdl:10013/epic.27914.d001) Half (Half) * PI: Westphal, Hildegard (https://orcid.org/0000-0001-7324-6122, hildegard.westphal@leibniz-zmt.de) * COMMENT: Core half Description (Description) * PI: Westphal, Hildegard (https://orcid.org/0000-0001-7324-6122, hildegard.westphal@leibniz-zmt.de) Image (IMAGE) * PI: Westphal, Hildegard (https://orcid.org/0000-0001-7324-6122, hildegard.westphal@leibniz-zmt.de) License: Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/) Status: Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels) Size: 156 data points Files: All files referred to in data matrix can be downloaded in one go as ZIP or TAR (PANGAEA user account required). To download single files, use the filename from data matrix appended to "https://download.pangaea.de/dataset/995587/files/". */ Event Sample label Half Description IMAGE 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig5B_104-12-1-146-CUT1.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig5C_104-12-1-146-CUT2.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig5D_104-12-1-146-SF7.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig5E_104-12-1-146-SF8.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig5F_104-12-1-146-SF18.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig5G_104-12-1-146-SF14.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig5H_104-12-1-146-CUT4.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig5I_104-12-1-146-CUT7.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig5J_104-12-1-146-CUT16.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig5K_104-12-1-146-CUT14.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig6A_104-12-1-146-CUT021.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig6B_104-12-1-146-SF002.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig6C_104-12-1-146-SF003.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig6D_104-12-1-146-SF027.tif 389-M0102C 389-M0102C-22R-1,82-85 Working (W) SEM image, tiff file Fig6E_102C-22-1-82-85_15.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig6F_104-12-1-146-CUT020.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig6G_104-12-1-146-CUT018.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig6H_104-12-1-146-CUT011.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig6I_104-10-127-133_04.tif 389-M0102C 389-M0102C-22R-1,82-85 Working (W) SEM image, tiff file Fig6J_102-22-82-85_03.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig6K_104-12-1-146-SF26.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig6L_104-12-1-146-SF28.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig7A_104-12-1-146-SF032.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig7B_104-12-1-146-SF034.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig7C_104-12-1-146-SF033.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig7D_104-12-1-146-SF047.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig7E_104-12-1-146-SF039.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig7F_104-12-1-146-SF035.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig7G_104-12-1-146-SF019.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig7H_104-12-1-146-SF044.tif 389-M0104A 389-M0104A-12R-1,146-150 Working (W) SEM image, tiff file Fig7I_104-12-1-146-SF012.tif 389-M0097B 389-M0097B-7R-2,69-75.5 Working (W) SEM image, tiff file Fig8A_97cut_T1_002.tif 389-M0097B 389-M0097B-7R-2,69-75.5 Working (W) SEM image, tiff file Fig8B_97B-72-69-75_5cut_T1_003.tif 389-M0097B 389-M0097B-7R-2,69-75.5 Working (W) SEM image, tiff file Fig8C_97B-72-69-75_5surf_T1_003.tif 389-M0097B 389-M0097B-7R-2,69-75.5 Working (W) SEM image, tiff file Fig8C_inset1_97B-72-69-75_5surf_T1_006.tif 389-M0097B 389-M0097B-7R-2,69-75.5 Working (W) SEM image, tiff file Fig8C_inset2_97B-72-69-75_5surf_T1_005.tif 389-M0097B 389-M0097B-7R-2,69-75.5 Working (W) SEM image, tiff file Fig8D_97B-72-69-75_5surf_T1_025.tif 389-M0097B 389-M0097B-7R-2,69-75.5 Working (W) SEM image, tiff file Fig8E_97B-72-69-75_5cut_ETD_013.tif 389-M0097B 389-M0097B-7R-2,69-75.5 Working (W) SEM image, tiff file Fig8F_97B-72-69-75_5cut_T1_011.tif