A.A. Boggess B.J. Buczkowski J.D. Chaytor 20230605 1.0 spreadsheet data release DOI:10.5066/P9H74BAX Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Hazards and Resources Program https://doi.org/10.5066/P9H74BAX https://www.sciencebase.gov/catalog/item/6436e578d34ee8d4addcb34d A.A. Boggess B.J. Buczkowski J.D. Chaytor 2023 1.0 data release DOI:10.5066/P9H74BAX Reston, VA U.S. Geological Survey Suggested citation: Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 2023, Sedimentological and geotechnical analyses of marine sediment cores from the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon collected on USGS Field Activity 2012-007-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9H74BAX. https://doi.org/10.5066/P9H74BAX https://www.sciencebase.gov/catalog/item/64355a3dd34ee8d4addacd40 Twenty-four piston cores (and associated trigger cores) were collected from the source zone of the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon by the U.S. Geological Survey and the University of Rhode Island Department of Ocean Engineering during an eight-day cruise aboard the R/V Hugh R. Sharp in September/October of 2012. These cores were analyzed for evidence of seafloor mass transport processes, with an emphasis on constraining the age and shallow stratigraphy of the landslide complex. Sedimentological and geotechnical characterization of the cores was carried out through whole core imaging and description, followed by analysis of discrete samples at the USGS Woods Hole Coastal and Marine Science Center's Sediment Analysis Laboratory and other facilities, including grain-size, CaCO3 content, mineral composition, and bulk index properties (e.g., undrained shear strength and water content), micropaleontologic separations, and geochronology. This data release contains the results of these core descriptions and results of the laboratory analyses. The data provides a comprehensive understanding of the nature and properties of the sediments found in this geographic location. Bulk organic matter and carbonate content analyses were used to determine the percentage of organically-derived material present in samples collected from the cores. Cores were collected on the Hugh R. Sharp cruise HRS1209 from September 28, 2012 to October 4, 2012, and currently reside in the Woods Hole Coastal and Marine Science Center's core repository. Information about USGS Field Activity 2012-007-FA is available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2012-007-FA. 20120928 20121004 ground condition Complete None planned -74.742167 -73.6337 38.0064 36.23034 ISO 19115 Topic Category oceans geoscientificInformation None U.S. Geological Survey USGS Woods Hole Coastal and Marine Science Center WHCMSC sediment samples cores piston cores trigger cores Cruise ID HRS1209 WHCMSC Field Activity 2012-007-FA Hugh R. Sharp calcium carbonate organic carbon Loss on Ignition CC LOI USGS Thesaurus geology sedimentology piston coring core analysis unconsolidated deposits clay deposits sand deposits carbon Holocene USGS Metadata Identifier USGS:6436e578d34ee8d4addcb34d None Currituck Landslide Baltimore Canyon Atlantic U.S. Continental Shelf Virginia North Carolina Maryland None. Not to be used for navigation. The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. Jason D. Chaytor U.S. Geological Survey, Northeast Region Research Geologist mailing and physical

384 Woods Hole Road

Woods Hole MA 02543 US 508-548-8700 x2351 jchaytor@usgs.gov https://www.sciencebase.gov/catalog/file/get/6436e578d34ee8d4addcb34d?name=HRS1209_CarbonateContent.jpg&allowOpen=true Browse image of the collection locations of cores analyzed for bulk organic matter and carbonate content. JPEG Microsoft Windows 10 Enterprise Version 10.0.18363 (Build 18363) Efficiency of Loss on Ignition is greater than 99% and routinely checked via ignition of a bivalve shell (96-97% CaCO3) standard. Data fall within generally expected ranges. Of the 24 piston and associated trigger cores collected during the Hugh R. Sharp HRS1209 cruise, 11 cores were analyzed for this loss-on-ignition dataset. Cores chosen for analysis were thought to represent the full range of sediments expected to be encountered. Omitted cores were not included because the coring locations were near previously analyzed cores. Horizontal location accuracy is less than 1 meter. Water depth accuracy is within 1 meter. Walter E. Dean 1974 Journal of Sedimentary Research Vol. 44 Tulsa, OK SEPM Journal of Sedimentary Research http://dx.doi.org/10.1306/74D729D2-2B21-11D7-8648000102C1865D Digital and/or Hardcopy 1974 publication date Dean (1974) A modified version of the methods described in the paper were used to produce this dataset. Carbon content loss-on-ignition (CC-LOI) samples data with Sample_ID containing "CC") were taken from cores in 1 cm-thick subsamples and placed into pre-weighed aluminum dishes. Samples were weighed after drying in oven at 100 degrees Celsius for at least 24 hours. The dry sample was powdered using a mortar and pestle. 2-4 grams of dry powder were transferred to a pre-weighed ceramic crucible. 2019 Filled crucibles were heated in a muffle furnace for CC-LOI in two stages, using a modified method outlined by Dean (1974). Crucibles were heated to 550 degrees Celsius for 3 hours, cooled, and weighed. Weight differential after the first heating step is assigned to loss of organic matter. Samples were then heated at 950 degrees Celsius for 2 hours. The second weight differential is equated to loss of carbon dioxide from CaCO3 in the sediment. 2020 Allyson A. Boggess U.S. Geological Survey, NORTHEAST REGION mailing address

384 Woods Hole Road

Woods Hole MA 02543 US 508-548-8700 x2341 508-457-2310 aboggess@usgs.gov Samples' weight differentials were recorded on spreadsheets in batches as analyses were performed. The complete HRS1209 CC-LOI dataset was later compiled into a CSV (comma-separated value) text file for end-user accessibility. Dean (1974) 2021 Point Point 149 0.0197464427 0.0258271413 Decimal degrees WGS_1984 WGS_84 6378137.0 298.257223563 Local surface 0.1 meters Attribute values HRS1209_CarbonContent.csv Comma Separated Value (CSV) file containing carbonate content data for piston cores collected from the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon. Producer Defined Sample_ID Sample ID. Naming convention: 12007-XX-P-YY-ZZ (12007= Field ID abbreviation: 2012-007-FA) (XX=Core ID number) (P=piston core or T=trigger core) (YY=Indicates sample collection purpose; CC=Bulk organics/carbonate LOI, ID=Identification) (ZZ=Sample number or letter) Producer Defined character string Cruise_ID Cruise identification code, specific to research vessel Producer Defined HRS1209 Hugh R. Sharp cruise HRS1209, also known by USGS field activity number 2012-007-FA. Producer defined Contact Contact for samples Producer Defined JCHAYTOR Jason D. Chaytor USGS Area General area where samples were taken Producer Defined Currituck Landslide Currituck Landslide Complex Producer defined Core_ID Core identification number assigned in field. Naming convention: HRS1209-XXPC (HRS1209 = cruise ID) (XX= core ID number) (PC=piston core, TC=trigger core) Producer Defined character string Latitude_DD Latitude of the core that sample came from Producer Defined 36.230340 38.006400 decimal degrees Longitude_DD Longitude of the core that sample came from Producer Defined -74.742167 -73.633700 decimal degrees Water_Depth_m Water depth at the location where the core was collected Producer Defined 532 1872 meters 1 T_Depth_cm Depth of the top of the interval that was sampled for analysis as measured from the top of the core Producer Defined 10 652 centimeters B_Depth_cm Depth of the bottom of the interval that was sampled for analysis as measured from the top of the core Producer Defined 11 653 centimeters Device Device used to collect core Producer Defined PISTON CORER Piston corer Producer defined TRIGGER CORER Trigger corer Producer defined Date_Collected_MM/DD/YYYY Date that core was collected. Format: MM/DD/YYYY (MM=Month) (DD=Day) (YYYY=Year) Producer Defined character string Date_Analyzed_MM/DD/YYYY Date that CC-LOI analysis was completed. Format: MM/DD/YYYY (MM=Month) (DD=Day) (YYYY=Year) Producer Defined character string Crucible_Wt_g Weight of crucible in which sample was heated for CC-LOI Producer Defined 5.9523 7.8647 grams 0.0001 Gross_Initial_Wt_g Combined weight of crucible and powdered sample, prior to heating Producer Defined 8.1603 13.1680 grams 0.0001 Sample_Initial_Wt_g Initial weight of sample, calculated from gross initial weight minus crucible weight Producer Defined 1.4296 6.3000 grams 0.0001 Gross_Sample_Wt_550C_g Combined weight of crucible and sample after heating to 550 degrees Celsius for 3 hours Producer Defined 7.8566 13.1100 grams 0.0001 Sample_Wt_550C_g Sample weight after heating to 550 degrees C for 3 hours, calculated from Gross_Sample_Wt_550C_g minus Crucible_Wt_g Producer Defined 1.3178 6.2180 grams 0.0001 Sample_WtLoss_550C_g Weight differential between initial sample weight and sample weight after heating at 550 degrees Celsius for 3 hours Producer Defined 0.0214 0.3914 grams 0.001 Bulk_Organic_Matter_WtPct Weight percent of organic matter and carbon lost while heating sample to 550 degrees C for 3 hours; calculated as the percent of sample weight lost divided by initial sample weight. Producer Defined 0.6760 13.7545 weight percent 0.0001 Gross_Wt_950C_g Combined weight of crucible and sample after heating to 950 degrees Celsius for 2 hours Producer Defined 7.7673 12.7360 grams 0.0001 Sample_Wt_950C_g Sample weight after heating to 950 degrees Celsius for 2 hours, calculated from Gross_Wt_950C_g minus original crucible weight Producer Defined 1.2876 5.9190 grams 0.0001 Sample_WtLoss_950C_g Weight differential between sample weight after 3 hours heated to 550 degrees Celsius and final sample weight after heating at 950 degrees Celsius for 2 hours Producer Defined 0.0302 0.7585 grams 0.0001 CO2_WtPct Weight percent of carbon dioxide released from carbonate minerals while heating sample to 950 degrees Celsius for 2 hours; percent of weight differential between sample after 550 degree heating and sample after 950 degree heating, divided by initial sample weight Producer Defined 0.3280 6.8600 weight percent 0.0001 CaCO3_WtPct Weight percent of calcium carbonate in sample; calculated from weight percent carbon dioxide multiplied by molecular conversion from CO2 to CaCO3 (2.27) Producer Defined 2.8824 39.0210 weight percent 0.0001 These attribute definitions describe each column of information in the HRS1209_CarobonContent.csv file USGS Field Activity 2012-007-FA U.S. Geological Survey - ScienceBase mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov The dataset includes the data files (HRS1209_CarbonContent.csv), the browse graphic (HRS1209_BrowseGraphic.jpg) and the FGDC CSDGM metadata in XML format (HRS1209_CarbonContent_Metadata.xml). Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. CSV Microsoft Excel 2008 The dataset contains the bulk carbon content data in CSV format. 1.31 https://www.sciencebase.gov/catalog/file/get/6436e578d34ee8d4addcb34d https://www.sciencebase.gov/catalog/item/6436e578d34ee8d4addcb34d https://doi.org/10.5066/P9H74BAX The first link is to download the data in a ZIP file. The second link is to the dataset landing page where files can be downloaded individually. The third link is to the main landing page of the data release. None 20230605 Allyson A. Boggess U.S. Geological Survey, NORTHEAST REGION Geologist mailing address

384 Woods Hole Road

Woods Hole MA 02543 US 508-548-8700 x2341 508-457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998