Westphal Hildegard hildegard.westphal@leibniz-zmt.de 0000-0001-7324-6122 Leibniz Centre for Tropical Marine Research, Bremen, Germany ZMT https://leibniz-zmt.de/ https://ror.org/019w00969 Garuglieri Elisa elisa.garuglieri@kaust.edu.sa King Abdullah University of Science and Technology KAUST https://www.kaust.edu.sa/en https://ror.org/01q3tbs38 Webb Gregory E 0000-0002-9206-978X University of Queensland, Brisbane UQ https://www.uq.edu.au https://ror.org/00rqy9422 Nothdurft Luke l.nothdurft@qut.edu.au 0000-0001-9646-9070 Queensland University of Technology QUT https://www.qut.edu.au/ https://ror.org/03pnv4752 Merkel Anna anna.merkel@fau.de Friedrich-Alexander-Universität, Erlangen-Nürnberg https://ror.org/00f7hpc57 Khanna Pankaj Pankaj.khanna@iitgn.ac.in 0000-0001-7165-3082 Indian Institute of Technology Gandhinagar https://ror.org/0036p5w23 Karki Poornima poornima.karki@iitgn.ac.in Indian Institute of Technology Gandhinagar https://ror.org/0036p5w23 Nohl Theresa theresa.nohl@univie.ac.at 0000-0001-8670-0478 University of Vienna https://ror.org/03prydq77 Gischler Eberhard gischler@em.uni-frankfurt.de Goethe University Frankfurt https://www.uni-frankfurt.de/de?locale=de https://ror.org/04cvxnb49 Webster Jody M jody.webster@sydney.edu.au 0000-0002-0005-6448 University of Sydney https://ror.org/0384j8v12 2026 Scanning Electron Micrographs of biosignatures of microbial mats (IODP Expedition 389) dataset https://doi.pangaea.de/10.1594/PANGAEA.995587 2026-07-06T08:28:57 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. Westphal Hildegard hildegard.westphal@leibniz-zmt.de 0000-0001-7324-6122 Garuglieri Elisa elisa.garuglieri@kaust.edu.sa Webb Gregory E 0000-0002-9206-978X Nothdurft Luke l.nothdurft@qut.edu.au 0000-0001-9646-9070 Merkel Anna anna.merkel@fau.de Khanna Pankaj Pankaj.khanna@iitgn.ac.in 0000-0001-7165-3082 Karki Poornima poornima.karki@iitgn.ac.in Nohl Theresa theresa.nohl@univie.ac.at 0000-0001-8670-0478 Gischler Eberhard gischler@em.uni-frankfurt.de Webster Jody M jody.webster@sydney.edu.au 0000-0002-0005-6448 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 -156.0628769 -154.9539999 19.87031057 20.28987123 -155.55596186666665 20.034096933333334 2023-09-10T00:00:00 2023-10-16T00:00:00 -415.9 -347.0 389-M0097B KAW-04Bb 19.942109 -156.0628769 Hawaii, USA -414.6 2023-09-10T00:00:00 2023-09-12T00:00:00 Exp389 Exp389 Hawaiian Drowned Reefs (HDR) Hawaiian Drowned Reefs (HDR) https://doi.org/10.14379/iodp.proc.389.2025 2023-08-31T00:00:00 2023-08-31 2023-10-31T00:00:00 2023-10-31 MMA Valour https://store.pangaea.de/documentation/Cruise_Reports/OtherVessels/MMA_Valour.pdf 9WNE6 9651929 Webster, Jody M Webster, Jody M Ravelo, Ana Christina Ravelo, Ana Christina MMA Valour https://store.pangaea.de/documentation/Cruise_Reports/OtherVessels/MMA_Valour.pdf 9WNE6 9651929 Benthic Portable Remotely Operated Drill (PROD5) 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 20.28987123 -155.6510088 Hawaii, USA -415.9 2023-10-08T00:00:00 2023-10-11T00:00:00 Exp389 Exp389 Hawaiian Drowned Reefs (HDR) Hawaiian Drowned Reefs (HDR) https://doi.org/10.14379/iodp.proc.389.2025 2023-08-31T00:00:00 2023-08-31 2023-10-31T00:00:00 2023-10-31 MMA Valour https://store.pangaea.de/documentation/Cruise_Reports/OtherVessels/MMA_Valour.pdf 9WNE6 9651929 Webster, Jody M Webster, Jody M Ravelo, Ana Christina Ravelo, Ana Christina MMA Valour https://store.pangaea.de/documentation/Cruise_Reports/OtherVessels/MMA_Valour.pdf 9WNE6 9651929 Benthic Portable Remotely Operated Drill (PROD5) 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 19.87031057 -154.9539999 Hawaii, USA -347.0 2023-10-14T00:00:00 2023-10-16T00:00:00 Exp389 Exp389 Hawaiian Drowned Reefs (HDR) Hawaiian Drowned Reefs (HDR) https://doi.org/10.14379/iodp.proc.389.2025 2023-08-31T00:00:00 2023-08-31 2023-10-31T00:00:00 2023-10-31 MMA Valour https://store.pangaea.de/documentation/Cruise_Reports/OtherVessels/MMA_Valour.pdf 9WNE6 9651929 Webster, Jody M Webster, Jody M Ravelo, Ana Christina Ravelo, Ana Christina MMA Valour https://store.pangaea.de/documentation/Cruise_Reports/OtherVessels/MMA_Valour.pdf 9WNE6 9651929 Benthic Portable Remotely Operated Drill (PROD5) IGSN: IBCR0389EH16101. Spatial reference system (SRS): 4326. Comment: LAT water depth: 346.6m. Borehole terminated as per client request. 156 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Event label Event Westphal Hildegard hildegard.westphal@leibniz-zmt.de 0000-0001-7324-6122 Event Sample code/label Sample label DSDP/ODP/IODP sample designation hdl:10013/epic.27914.d001 Westphal Hildegard hildegard.westphal@leibniz-zmt.de 0000-0001-7324-6122 Sample label Half Half Westphal Hildegard hildegard.westphal@leibniz-zmt.de 0000-0001-7324-6122 Core half Half Description Description description Westphal Hildegard hildegard.westphal@leibniz-zmt.de 0000-0001-7324-6122 Description Image IMAGE Westphal Hildegard hildegard.westphal@leibniz-zmt.de 0000-0001-7324-6122 IMAGE CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels biosignatures Coral Reef Hawaiian Drowned Reefs microbialites Pleistocene ZMT author101865 author118081 author118082 author118083 author29383 author29384 author35719 author75617 author76285 author87512 basis5510 campaign3394751 campaign52456 curlevel30 event3284670 event3284686 event3284688 geocode1599 geocode1600 geocode1601 geocode8128 inst10731 inst12761 inst14293 inst20544 inst20687 inst20998 inst22338 inst22835 inst46 journal2146 license21 method18136 method5059 param150836 param16062 param7055 param790 pi29384 ref140354 term379 term40415 term40710 term50613 term76454 term76617 term78202 term78203