SeanPaul M. La Selle M. Allison Stegner Brandon M. Nasr Elizabeth A. Hadly Anthony D. Barnosky Brian Sherrod 20230131 raster digital data data release DOI:10.5066/P98CEB1B Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P98CEB1B https://www.sciencebase.gov/catalog/item/630569ced34e3b967a8b51c1 SeanPaul M. La Selle M. Allison Stegner Brandon M. Nasr Elizabeth A. Hadly Anthony D. Barnosky Brian Sherrod 2023 publication data release DOI:10.5066/P98CEB1B Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P98CEB1B This portion of the data release presents linescan images (photographs) from vibracores collected from Searsville Lake, a reservoir in Jasper Ridge Biological Preserve, Stanford, California in October 2018 (USGS Field Activity 2018-682-FA). Images were obtained from two vibracores (JRBP2018-VC01A and JRBP2018-VC01B) at 50-micron (200 pixel per cm) resolution. Color images in 16-bit TIFF format are provided for each core segment, along with proprietary metadata files containing image scaling information. Images were obtained to characterize sediments in vibracores. These data are intended for science researchers, students, policy makers, and the general public. Additional information about the field activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-682-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20181029 20181029 ground condition Complete None planned -122.23787 -122.23783 37.40684 37.40683 ISO 19115 Topic Category geoscientificInformation inlandWaters USGS Thesaurus limnology core analysis Data Categories for Marine Planning substrate Marine Realms Information Bank (MRIB) keywords sediment None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC USGS Metadata Identifier USGS:630569ced34e3b967a8b51c1 Geographic Names Information System (GNIS) Searsville Lake Jasper Ridge Stanford San Mateo County State of California None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. PCMSC Science Data Coordinator U.S. Geological Survey, Pacific Coastal and Marine Science Center mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-474 pcmsc_data@usgs.gov No formal attribute accuracy tests were conducted The core depths listed in the Geotek software’s proprietary metadata files and the ruler alongside the TIFF images are not corrected for sediment compaction and are relative to the surface of the lakebed. Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. The locations of samples were determined using a Garmin etrex 30x handheld global satellite navigation system (GNSS) receiver capable of receiving wide area augmentation system (WAAS) signals. The manufacturer reported accuracy for horizontal positions is 3-5 m while receiving WAAS signals. Core location depths and water depths were not associated with a fixed vertical datum at the time of core collection. No formal positional accuracy tests were conducted, nor were they applicable for this dataset. Cores were collected on October 29, 2018. A handheld global satellite navigation system (GNSS) receiver was used to determine the locations of sediment samples. Cores were segmented into 150 cm (or shorter) sections in the field and split into "working" and "archive" halves in the lab. Sediment surfaces were cleaned and smoothed on the "working" halves of split cores. A Geotek V Linescan Imaging system mounted to a Geotek Multisensor Core Logger (MSCL) was used to automate continuous downcore photography. A prime lens with a 50 mm focal length was mounted 38.6 cm above the core surface. Cross polarized light emitting diodes (LED) were used to illuminate the sediment surface. Colors were calibrated in the Geotek Linescan software using an 18 percent gray card and images were acquired at an aperture of f4.07 and exposure time of 80 milliseconds. Each zip file corresponding to individual core segments contain two color images in 16-bit TIFF format, along with proprietary metadata files containing image scaling information. The TIFF filenames ending in '_R' contain an embedded vertical scale on the left-hand side. Zip file names correspond to the names of each core segment. For example ‘JRBP2018-VC01A-289-439cm_linescan.zip’ contains two TIFF images from a segment of the vibracore VC01A with a top depth below the lakebed of approximately 289 cm and bottom depth of 439 cm. 20190618 SeanPaul La Selle U.S. Geological Survey, Pacific Coastal and Marine Science CEnter Geologist mailing and physical

2885 Mission St.

Santa Cruz CA 95060 831-460-7574 slaselle@usgs.gov corrected typo in doi number (scochran@usgs.gov) 20230223 0.00004 0.00001 Decimal Degrees WGS_1984 WGS_1984 6378137.0 298.257223563 zip files containing linescan images Each zip file contains 2 TIFF files and their respective software-proprietary XML files. Producer defined JRBP2018-VC01B-158-214cm_linescan, JRBP2018-VC01B-216-364cm_linescan, JRBP2018-VC01B-364-515cm_linescan, JRBP2018-VC01B-515-650cm_linescan, JRBP2018-VC01B-650-801cm_linescan, JRBP2018-VC01B-801-952cm_linescan, JRBP2018-VC01B-952-1103cm_linescan Folders each containing two linescan TIFF images representing each core section and their respective Geotek software-proprietary XML files. The TIFF files ending in "_R" include a digital scale on the left side of the image. The Geotek software-proprietary XML files contain the following attributes and example attribute values are provided: <geotek-image> <image-type>giTIFImage</image-type> <coreID>JRBP2018-VC01B-158-214cm</coreID> <section-number>1</section-number> <image-number>1</image-number> <physical-width>8.20</physical-width> <physical-height>56.90</physical-height> <pixels-per-scan>5</pixels-per-scan> <pixels-per-CM>200</pixels-per-CM> <horizontal-resolution>200</horizontal-resolution> <exposure-time-ms>80</exposure-time-ms> <calibration-aperture>5.99</calibration-aperture> <image-aperture>4.07</image-aperture> <red-high-calibration>18.0</red-high-calibration> <green-high-calibration>18.0</green-high-calibration> <blue-high-calibration>18.0</blue-high-calibration> <red-low-calibration>0.0</red-low-calibration> <green-low-calibration>0.0</green-low-calibration> <blue-low-calibration>0.0</blue-low-calibration> <pixel-width>1639</pixel-width> <scan-lines>11380</scan-lines> <filename>IM001_01.tif</filename> <geotek-camera-lighting version="2" mode="visible"> <visible-lighting-data> <bank-two> <bank2cluster1>128</bank2cluster1> <bank2cluster2>128</bank2cluster2> <bank2cluster3>128</bank2cluster3> <bank2cluster4>128</bank2cluster4> <bank2cluster5>128</bank2cluster5> </bank-two> <bank-one> <bank1cluster1>128</bank1cluster1> <bank1cluster2>128</bank1cluster2> <bank1cluster3>128</bank1cluster3> <bank1cluster4>128</bank1cluster4> <bank1cluster5>128</bank1cluster5> </bank-one> </visible-lighting-data> </geotek-camera-lighting> <convg-x-red>0</convg-x-red> <convg-x-green>0</convg-x-green> <convg-x-blue>0</convg-x-blue> <convg-y-red>0</convg-y-red> <convg-y-green>4</convg-y-green> <convg-y-blue>8</convg-y-blue> <is-a-sync-scan-image>0</is-a-sync-scan-image> </geotek-image> producer defined These Geotek software-proprietary XML files contain information on linescan image acquisition settings and image scaling. The values in the example provided may be different for each scan. Please contact the PCMSC data coordinator for more information on the contents of these XML files. GS ScienceBase U.S. Geological Survey mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Linescan images are available in TIFF image format and provided along with FGDC-compliant metadata. 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 for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. TIFF Downloadable zip files, ranging in size from 212.5 MB to 581.8 MB, contain linescan TIFF (.tif) images and associated software-proprietary metadata files (.xml). Zip file names correspond to the names of each core segment. For example ‘JRBP2018-VC01A-289-439cm_linescan.zip’ contains linescan TIFF images from the segment of vibracore VC01A with a top depth of 289 cm and bottom depth of 439 cm. Zip 528046 https://www.sciencebase.gov/catalog/item/630569ced34e3b967a8b51c1 https://doi.org/10.5066/P98CEB1B Data can be downloaded using the Network_Resource_Name links. The first link points to a landing page with metadata and individual zipped data files of linescan photographs. The second link points to the landing page for the entire data release. None 20230223 PCMSC Science Data Coordinator U.S. Geological Survey, Pacific Coastal and Marine Science Center mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998