Citation:

PANGAEA.995587 (DOI registration in progress)

Name: Scanning Electron Micrographs of biosignatures of microbial mats (IODP Expedition 389)
Published: 2026-07-06
License: https://creativecommons.org/licenses/by/4.0/
Keywords: biosignatures; Coral Reef; Hawaiian Drowned Reefs; microbialites; Pleistocene

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Published: 2026-07-06

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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: (Hawaiian Drowned Reefs (HDR)) * Basis: * 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: (Hawaiian Drowned Reefs (HDR)) * Basis: * 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: (Hawaiian Drowned Reefs (HDR)) * Basis: * 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):

#	Name	Short Name	Principal Investigator	Method/Device	Comment
1	Event label	Event	Westphal, Hildegard
2	Sample code/label	Sample label	Westphal, Hildegard	DSDP/ODP/IODP sample designation
3	Half	Half	Westphal, Hildegard		Core half
4	Description	Description	Westphal, Hildegard
5	Image	IMAGE	Westphal, Hildegard

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

156 data points

Data

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1 Event	2 Sample label	3 Half	4 Description	5 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