Metadata: Identification_Information: Citation: Citation_Information: Originator: Robert C. Witter Originator: SeanPaul M. La Selle Originator: Jessica DePaolis Originator: Peter J. Haeussler Originator: Adrian M. Bender Originator: Janet H. Curran Originator: Tina Dura Publication_Date: 20240326 Title: Locations of sediment cores collected from Montague Island, AK Geospatial_Data_Presentation_Form: comma-delimited text Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13RVDJZ Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, California Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P13RVDJZ Larger_Work_Citation: Citation_Information: Originator: Robert C. Witter Originator: SeanPaul M. La Selle Originator: Jessica DePaolis Originator: Peter J. Haeussler Originator: Adrian M. Bender Originator: Janet H. Curran Originator: Tina Dura Publication_Date: 2024 Title: Computed Tomography (CT) scans of sediment cores collected from Montague Island, AK Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13RVDJZ Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested Citation: Witter, R.C., La Selle, S.M., DePaolis, J., Haeussler, P.J., Bender, A.M., Curran, J.H., Dura, T., 2024, Computed Tomography (CT) scans of sediment cores collected from Montague Island, AK: U.S. Geological Survey data release, https://doi.org/10.5066/P13RVDJZ. Online_Linkage: https://doi.org/10.5066/P13RVDJZ Description: Abstract: This dataset includes locations of sediment cores collected from coastal environments on Montague Island, Alaska. The cores were collected with hand driven peat augers to assess environmental changes related to tectonic uplift caused by historic and prehistoric earthquakes. Purpose: The 2017 USGS Subduction Zone Science plan includes the key priority to characterize past hazardous events to forecast the future using onshore and offshore clues. Such clues include coastal evidence of sudden vertical land-level changes caused by large earthquakes along subduction zones. Sediment cores from lagoons uplifted >3 m in the 1964 earthquake along the coast of Montague Island aid in interpreting changes in deposition environment over the past several thousand years, which may record evidence for past episodes of earthquake uplift. Supplemental_Information: Cores were collected by USGS, Alaska Science Center; cores were subsequently analyzed and archived by collaborating scientists at Virginia Tech. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20190710 Ending_Date: 20190830 Currentness_Reference: Ground conditions at time data were collected Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -147.32948 East_Bounding_Coordinate: -147.30783 North_Bounding_Coordinate: 60.17820 South_Bounding_Coordinate: 60.19528 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:86b78265-de3f-4ab9-808f-1d7e8c5053fd Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: core analysis Theme_Keyword: earthquakes Theme_Keyword: paleoseismology Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: substrate Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: sediment Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: PCMSC Theme_Keyword: Earthquake Hazards Program Theme_Keyword: Alaska Science Center Theme_Keyword: Department of the Interior Theme_Keyword: DOI Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: State of Alaska Place_Keyword: Montague Island Place_Keyword: Chugach Census Area Place_Keyword: Prince William Sound Place: Place_Keyword_Thesaurus: None Place_Keyword: Chugach National Forest Access_Constraints: None. Please see 'Distribution Info' for details. Use_Constraints: USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: PCMSC Science Data Coordinator Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-474 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Native_Data_Set_Environment: CSV file was created and edited using Microsoft Excel v2308 running on Microsoft Windows 10 Enterprise v10.0.19045. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Quality control of attribute accuracy was conducted during field data collection and processing workflows. No formal attribute accuracy tests were conducted. Logical_Consistency_Report: No formal logical consistency tests were conducted. Completeness_Report: 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. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The locations of core sites in 2019 were determined using a 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. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Core depth interval values are relative to the top of sediment surface at the time of core collection. Coring-induced compaction, if any, was not determined. No formal vertical accuracy tests were conducted. Lineage: Process_Step: Process_Description: Sediment cores were collected from coastal environments on Montague Island, Alaska using a hand-driven peat sampler at two sites: 'Hidden Lagoons' and 'Crescent'. At each core site, two adjacent bore holes were used to sample sediment in 50 cm intervals. Coring alternated between the two bore holes to avoid sampling the approximately 7 cm of disturbed sediment induced by the “nose” at the bottom of the peat sampler. After core extraction, sediment in the auger was transferred to an approximately 5 cm diameter plastic sleeve (50 cm long, 2 inch diameter polyvinyl chloride (PVC) pipe cut lengthwise) and wrapped in plastic. Sampling depths were targeted to bracket specific stratigraphic layers. The cores in this data release therefore do not represent the entire stratigraphic sequence at each core site. Cores were transported back to the USGS Pacific Coastal and Marine Science Center core lab for subsequent CT analyses. Process_Date: 2019 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 6 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00001 Longitude_Resolution: 0.00001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: Local surface Depth_Resolution: 1.0 Depth_Distance_Units: centimeters Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: montague_cores.csv Entity_Type_Definition: A comma delimited text file in CSV format containing core location information and computed tomography (CT) scan image file names included in this data release. Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: core_id Attribute_Definition: Unique core identification assigned in the field. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Core IDs begin with '19' indicating collection in 2019. 'HL' refers to the Hidden Lagoons field site. 'CR' refers to the Crescent field site. Core segments from core site 19CR-10 were imaged in two separate CT scans and are designated with core IDs ‘19CR-10-01’ and ‘10CR-10-02’. Attribute: Attribute_Label: scan_filename Attribute_Definition: The filename of the CT scan TIF image associated with each core. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: CT images are included in this data release in the 'montague_ct.zip' file. Core segments from core 19CR-10 were imaged in two separate CT scans. Attribute: Attribute_Label: core_segment_depths_cm Attribute_Definition: The depth intervals each core segment represents, in centimeters below the ground surface at the time of core collection. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: CT scans contain 2-3 segments, and the depth intervals, starting with the uppermost core in the CT scan image are listed and separated by semicolons. The supporting file 'montague_ct_supportfile.pdf' included in the CT scan portion of this data release illustrates the locations of each core segment and their respective depth intervals. Attribute: Attribute_Label: latitude Attribute_Definition: Latitude of core site, in decimal degrees. Attribute_Definition_Source: handheld GPS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 60.17820 Range_Domain_Maximum: 60.19528 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: longitude Attribute_Definition: Unique core identification assigned in the field. Core IDs begin with '19' indicating collection in 2019. 'HL' refers to the Hidden Lagoons field site. 'CR' refers to the Crescent field site. Attribute_Definition_Source: handheld GPS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -147.32948 Range_Domain_Maximum: -147.30783 Attribute_Units_of_Measure: decimal degrees Overview_Description: Entity_and_Attribute_Overview: The first line of the csv file is a header line. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - CMGDS Contact_Address: Address_Type: mailing address Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Country: United States Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Resource_Description: Core information are provided in a CSV file (montague_cores.csv) with CSDGM FGDC compliant metadata. The first line of this file is a header. Distribution_Liability: 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Comma delimited text Format_Version_Number: Microsoft Excel v2308 running on Microsoft Windows 10 Enterprise v10.0.19045. Format_Information_Content: A Comma Separated Value (CSV) file containing the core ids, associated CT image filenames, core segment depth intervals, and locations of cores collected from Montague Island, AK. File_Decompression_Technique: none Transfer_Size: 0.000492 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P13RVDJZ Access_Instructions: Data can be downloaded using the Network_Resource_Name link and scrolling to montague_cores.csv in the Sampling Data section. Fees: None. Technical_Prerequisites: CSV file can be viewed with any standard text editing software. Metadata_Reference_Information: Metadata_Date: 20240329 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998