Identification_Information:
  Citation:
    Citation_Information:
      Originator: Laura E. Strickland
      Originator: Lesleigh Anderson
      Publication_Date: 2024
      Title: Late Pleistocene and Holocene plant macrofossil data from carbonate bearing lake sediments in the Matanuska-Susitna Valley, Alaska.
      Edition:
      Geospatial_Data_Presentation_Form: tabular digital data
      Publication_Information:
        Publication_Place: Denver, CO USA
        Publisher: U.S. Geological Survey
      Online_Linkage: https://doi.org/10.5066/P13XFATM
  Description:
    Abstract: Sediment cores from two lakes in the Matanuska-Susitna Valley, Alaska were collected in 2015 and 2016.  Neklason Lake core B15 consists of four drives and ? meters of sediment.   April Fools core B16 consists of 9 drives and ? meters. Both cores were sampled at 1 cm increments but not continuously.  Plant macrofossils materials examined were either collected directly from split core surfaces or extracted from >250um wet sieved sediment sample fractions. Plant remains were identified to the lowest taxonomic level possible using modern plant specimen collections housed in the USGS Quaternary Paleobotany Laboratory and botanical reference books.  Plant macrofossils from both the Neklason and April Fools cores represent organs from coniferous trees (Picea sp.), deciduous trees (Alnus/Betula sp.) and aquatic plants (Potamogeton sp.). Abundance (raw counts) of each plant taxon was recorded in a spreadsheet and the presence of other materials such as ostracodes, insects, charcoal, and Chara sp. oogonia were also recorded. Macrofossil data are provided in .csv and .xlsx formats.
    Purpose: The purpose of this plant macrofossil work is to support radiocarbon-based reconstructions of paleoclimate and paleoenvironments from multi-proxy sediment analyses including stable carbon and oxygen isotopes, geochemistry, and pollen.
    Supplemental_Information: None
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 2015
        Ending_Date: 2024
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: 150.43˚W
      East_Bounding_Coordinate: 148.88˚W
      North_Bounding_Coordinate: 61.85˚N 
      South_Bounding_Coordinate: 61.23˚N
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: plant macrofossil
      Theme_Keyword: paleoclimate
      Theme_Keyword: 
      Theme_Keyword: 
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: Alaska
      Place_Keyword: United States of America
  Access_Constraints: None
  Use_Constraints: 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.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Laura E. Strickland
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: Mailing
        Address: Box 25046, MS 980
        City: Denver
        State_or_Province: CO
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: 303-236-5302
      Contact_Electronic_Mail_Address: lstrickland@usgs.gov
  Data_Set_Credit: Development of this database has been supported by the U.S. Geological Survey Climate Research and Development Program.  We thank xxx for reviewing the data tables.
  Native_Data_Set_Environment: data tables in .csv and .xlsx format
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: All data were checked for inconsistencies, duplicates, or missing data.
  Logical_Consistency_Report: This data set has no topology.
  Completeness_Report: Data set is considered complete for the information presented.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Accuracy of these digital data in part is based upon the use of source graphics. Inaccuracies may exist due to boundary information obtained from various sources and scales. Horizontal positional accuracy for the digital data was tested by visual comparison to the source.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: No formal positional accuracy tests were conducted.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: xxx
          Publication_Date: xxx
          Title: xxx
          Geospatial_Data_Presentation_Form: xxx
          Online_Linkage: xxx
      Type_of_Source_Media: xxx
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: xxx
            Ending_Date: xxx
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: xxx
      Source_Contribution: xxx
    Process_Step:
      Process_Description: The data in this data release were created following the methods described here....
      Process_Date:
    Process_Step:
      Process_Description: 
      Process_Date:
    Process_Step:
      Process_Description: 
      Process_Date: 2021
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: 3331
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: .000001
      Longitude_Resolution: .000001
      Geographic_Coordinate_Units: Decimal Degrees
Entity_and_Attribute_Information:
  Overview_Description:
    Entity_and_Attribute_Overview:
      This data release includes the following files and data:

      - This metadata file (Strickland_and_Anderson_2024_macrofossil_metadata.xml and Strickland_and_Anderson_2024_macrofossil_metadata.txt)
      - A data dictionary file (Strickland_and_Anderson_2024_macrofossil_data_dictionary.csv)
      - The following data tables, in .csv and .xlsx formats:

      [Note: In the .csv and .xlsx files, not all lake sediment samples have complete data. Generally, cells that contain “n/a” indicate that samples were not analyzed and data are not available.  

      FILENAME: Strickland_and_Anderson_2024_Neklason_B16_macrodata.csv
      Strickland_and_Anderson_2024_Neklason_B16_macrodata.xslx

      COLUMN HEADINGS AND DESCRIPTIONS OF FIELD NAMES:

      
      SiteID_Core_Drive
      Drive_Depth_Upper_cm
      Drive_Depth_Lower_cm
      Composite_Depth_Upper_cm
      Composite_Depth_Lower_cm
      Description_of_Sieved_or_Picked_Materials
      Description_of_Plant_Macrofossils_Identified
      Pinaceae_samara_fragments_seeds_cone_parts
      cf_Pinaceae_seeds_cone_parts
      Picea_sitchensis_type_samara_wing
      Picea_sp_needle_tips_bases_seeds_twigs
      Betula_sp_seeds_catkin_scales
      cf_Betula_sp
      cf_Alnus_or_Betula_sp_seeds
      wood_twig_or_bark_fragments
      cf_wood_twig_or_bark_fragments
      charcoal
      broadleaf_fragments
      buds_or_budscales
      cf_budscales
      unknown_bracts_or_scales
      cf_Brassicaceae seed
      cf_Carex_sp_biconvex
      cf_Carex_sp_trigonus
      Potamogeton_sp_seeds
      Rubus_sp_seeds
      herbaceous_material
      bryophytes
      Chara_sp_oogonia_or_stem_casts
      bivalve_or_gastropod_shell_fragments
      insects
      ostracodes
      unknowns

FILENAME: Strickland_and_Anderson_2024_April_Fools_B15_macrodata.csv
      Strickland_and_Anderson_2024_April_Fools_B15_macrodata.xlsx

      COLUMN HEADINGS AND DESCRIPTIONS OF FIELD NAMES:

      SiteID_Core_Drive
      Drive_Depth_Upper_cm
      Drive_Depth_Lower_cm
      Composite_Depth_Upper_cm
      Compsite_Depth_Lower_cm
      Description_of_Sieved_or_Picked_Materials
      Description_of_Plant_Macrofossils_Identified
      Pinaceae_cone_scales
      cf_Picea_sp_needles_or_seeds
      Juniperus_horizontalis_stem_fragments
      Betula_sp_seeds_or_catkin_scales
      Salix_sp_type_buds
      wood_or_twigs
      cf._wood_or_twigs
      charcoal
      broadleaf_fragments
      cf_broadleaf_fragments
      Carex_sp_trigonus_seeds
      Carex_sp_seeds
      herbaceous_material
      bryophytes
      Chara_sp_oogonia_or_stem_casts
      bivalve_or_gastropod_shell_fragments
      insects
      Daphnia_sp_ephippia
      ostracodes
      unknowns
      
      
      --------------------


    Entity_and_Attribute_Detail_Citation: Strickland_and_others_2024_Thompson_midden_collection_data_dictionary.csv
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: U.S. Geological Survey - ScienceBase
        Contact_Organization: U.S. Geological Survey - ScienceBase
      Contact_Address:
        Address_Type: Mailing and Physical
        Address: Denver Federal Center, Building 810, Mail Stop 302
        City: Denver
        State_or_Province: CO
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: 1-888-275-8747
      Contact_Electronic_Mail_Address: sciencebase@usgs.gov
  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 for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

    Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: Digital Data
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: https://doi.org/10.5066/P91UOARW
    Fees: None
Metadata_Reference_Information:
  Metadata_Date: 20220428
  Metadata_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Laura E. Strickland
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Geographer
      Contact_Address:
        Address_Type: Mailing
        Address: Box 25046, MS 980
        City: Denver
        State_or_Province: CO
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: 303-236-5808
      Contact_Electronic_Mail_Address: rtpelltier@usgs.gov
  Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
