Metadata: Identification_Information: Citation: Citation_Information: Originator: Khan, Nicole S. Originator: Toth, Lauren T. Publication_Date: 20220706 Title: South Florida mangrove peat radiocarbon metadata Geospatial_Data_Presentation_Form: tabular digital data Larger_Work_Citation: Citation_Information: Originator: Khan, Nicole S. Originator: Toth, Lauren T. Originator: Moyer, Ryan P. Originator: Shaw, Jaimie E. Originator: Capar, Paulina Originator: Kemp, Andrew C. Originator: Engelhart, Simon E. Originator: Horton, Benjamin P. Publication_Date: 20220706 Title: Mangrove Peat Radiocarbon Ages From Snipe and Swan Key, FL Series_Information: Series_Name: U.S. Geological Survey data release Issue_Identification: doi:10.5066/P9OOL3L4 Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Online_Linkage: https://doi.org/10.5066/P9OOL3L4 Description: Abstract: In 2016, U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) researchers and academic collaborators collected cores of mangrove peat from two islands in the Florida Keys: Snipe Key (24.679°N, 81.653°W) and Swan Key (25.349°N, 80.251°W). This data release contains the radiocarbon ages and associated data for peat samples analyzed throughout the two cores (SNK-16-C1 and SBC-16-C10). Purpose: Data were obtained to reconstruct millennial-scale variability in sea-level change of across the Florida Keys in Khan and others (2022). Supplemental_Information: The cores collected were assigned a Field Activity Number (FAN), 2016-344-FA. FANs are unique identifiers assigned by the USGS to provide more information about the activities conducted in the field for a study. Please visit the Coastal and Marine Geoscience Data System (CMGDS) field activity webpage for more information about the FAN related to this dataset, https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-344-FA. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2016 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -81.653 East_Bounding_Coordinate: -80.251 North_Bounding_Coordinate: 25.349 South_Bounding_Coordinate: 24.679 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:f335e6d7-c046-41ce-b5c2-b346e3a0e1dc Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: radiometric dating Theme_Keyword: core analysis Theme_Keyword: push coring Theme_Keyword: geochronology Theme_Keyword: paleoceanography Theme_Keyword: sea-level change Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Florida Keys Temporal: Temporal_Keyword_Thesaurus: USGS Thesaurus Temporal_Keyword: Holocene Access_Constraints: None Use_Constraints: None Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Lauren T. Toth Contact_Organization: SOUTHEAST REGION: ST. PETE COASTAL & MARINE SC Contact_Position: Research Physical Scientist Contact_Address: Address_Type: mailing and physical Address: 600 4Th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: US Contact_Voice_Telephone: 727-502-8029 Contact_Electronic_Mail_Address: ltoth@usgs.gov Cross_Reference: Citation_Information: Originator: Khan, Nicole S. Originator: Ashe, Erica Originator: Moyer, Ryan P. Originator: Kemp, Andrew C. Originator: Engelhart, Simon E. Originator: Brain, Matthew J. Originator: Toth, Lauren T. Originator: Chappel, Amanda Originator: Christie, Margaret Originator: Kopp, Robert E. Originator: Horton, Benjamin P. Publication_Date: 20220730 Title: Relative sea-level change in South Florida during the past ~5,000 years Series_Information: Series_Name: Global and Planetary Change Issue_Identification: Volume 216 Online_Linkage: https://doi.org/10.1016/j.gloplacha.2022.103902 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted. Logical_Consistency_Report: No formal logical accuracy tests were conducted. Completeness_Report: Data set 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: No formal positional accuracy tests were conducted. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: No formal positional accuracy tests were conducted. Lineage: Process_Step: Process_Description: USGS SPCMSC researchers and academic collaborators collected at total of 91 samples of plant macrofossils or bulk mangrove peat throughout cores SNK-16-C1 and SBC-16-C10, from Snipe Key and Swan Key, respectively, to be used for radiocarbon dating. Macrofossils of mangrove trunks or branches, terminal stems, or prop root bark were collected for dating, where possible. These samples were cleaned of debris using sterile forceps under a binocular microscope before being sent to Woods Hole Oceanographic Institution’s National Ocean Science Accelerator Mass Spectrometry (NOSAMS) laboratory for analysis. At NOSAMS, the macrofossil samples were acid-base-acid pretreated prior to analysis to remove carbonates and other impurities. In parts of the core where there were no macrofossils, researchers instead extracted a 1-centimeter (cm) thick layer of bulk mangrove peat. Those samples were passed through a 63-micron sieve and the <63-micron fractions of the peat samples were transferred onto a clean fiberglass filter and dried at 55 degrees Celsius. Then, the dried bulk peat samples on the filters were shipped to NOSAMS for radiocarbon analysis. The bulk peat samples were acid pretreated by NOSAMS prior to analysis. For additional information on sample preparation, see Khan and others (2022). For additional information about radiocarbon analysis see the NOSAMS website (https://www2.whoi.edu/site/nosams/). Process_Date: 2017 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: 91 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Snipe_and_Swan_Key_mangrove_peat_radiocarbon_data.csv, Snipe_and_Swan_Key_mangrove_peat_radiocarbon_data.xlsx Entity_Type_Definition: Sample description and radiocarbon data from mangrove peat cores collected at Snipe Key and Swan Key, Florida. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: Core ID Attribute_Definition: A unique identifier (ID) for the two cores analyzed in this study. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: The core ID is a combination of the site where the core was collected (Snipe Key=SNK, Swan Key=SBC), the year the cores were collected (2016), and the core number (Snipe Key Core #1=C1, Swan Key Core #10=C10). Attribute: Attribute_Label: Accession Number Attribute_Definition: A unique identifier for each sample assigned by the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) radiocarbon laboratory. Attribute_Definition_Source: NOSAMS (https://www2.whoi.edu/site/nosams/) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: OS-126725 Range_Domain_Maximum: OS-138073 Attribute_Units_of_Measure: sample number Attribute: Attribute_Label: Depth in core (cm) Attribute_Definition: The depth in centimeters (cm) from the top of each core where each sample was collected. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 8.5 Range_Domain_Maximum: 750.5 Attribute_Units_of_Measure: centimeters (cm) Attribute: Attribute_Label: Sample type Attribute_Definition: The type of peat material (Bulk=bulk peat sample, Macro=macrofossil of mangrove wood) that was sampled for radiocarbon dating. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Bulk Enumerated_Domain_Value_Definition: The fine-fraction of bulk mangrove peat (<63 micron) was sampled from the core for radiocarbon dating. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Macro Enumerated_Domain_Value_Definition: Plant macrofossils of mangrove wood (trunk or branches), terminal stems, or prop root bark were sampled from the core for radiocarbon dating. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Process Attribute_Definition: The method (process) used by the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) radiocarbon laboratory to determine the radiocarbon ages of the samples. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (OC) Organic Carbon Enumerated_Domain_Value_Definition: This process is used for plant/wood and charcoal samples. These samples first undergo a series of acid-base-acid leaches to remove inorganic carbon and mobile organic acid phases. After that pre-treatment, the organic carbon samples are combusted at a high temperature to produce carbon dioxide for radiocarbon analysis. Enumerated_Domain_Value_Definition_Source: NOSAMS (https://www2.whoi.edu/site/nosams/) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (GS) Gas Sample Enumerated_Domain_Value_Definition: These samples are submitted to NOSAMS as ampoules of carbon dioxide. Those ampoules are cracked, quantified, split (if required), and transferred to a reaction tube for reduction to pure carbon. The carbon dioxide is reduced with use of a catalyst (iron or cobalt) in the presence of excess hydrogen. Enumerated_Domain_Value_Definition_Source: NOSAMS (https://www2.whoi.edu/site/nosams/) Attribute: Attribute_Label: F modern Attribute_Definition: F modern=Fraction modern, which is a measurement of the deviation of the carbon-14 to carbon-12 (14C/12C) ratio of a sample from “Modern.” Modern is defined as 95% of the radiocarbon concentration (in 1950 C.E.). Attribute_Definition_Source: NOSAMS (https://www2.whoi.edu/site/nosams/) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.5049 Range_Domain_Maximum: 1.2058 Attribute_Units_of_Measure: a unitless ratio Attribute: Attribute_Label: F modern uncertainty Attribute_Definition: The uncertainty in the determination of the deviation of a sample's radiocarbon content from a modern standard (F modern). Attribute_Definition_Source: NOSAMS (https://www2.whoi.edu/site/nosams/) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0013 Range_Domain_Maximum: 0.0035 Attribute_Units_of_Measure: unitless uncertainty on the fraction modern ratio Attribute: Attribute_Label: Age BP Attribute_Definition: The conventional radiocarbon age of the sample in years before present (BP) where "present" by convention is 1950 C.E. If the radiocarbon age was younger than 1950, then the age is listed as ">Modern". Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 105 Range_Domain_Maximum: 5490 Attribute_Units_of_Measure: years before 1950 Attribute: Attribute_Label: Age BP uncertainty Attribute_Definition: The uncertainty in the conventional radiocarbon age of the sample in years. Modern (younger than 1950 C.E.) radiocarbon ages have no uncertainty so in the case of a modern age, this field is blank. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 15 Range_Domain_Maximum: 30 Attribute_Units_of_Measure: radiocarbon years Attribute: Attribute_Label: d13C Attribute_Definition: A measure of the fractionation of 12C to 13C, expressed as the ratio of 13C to 12C (delta 13C or d13C). This value is used to correct the fraction modern and the conventional radiocarbon age of the sample, measured by the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS). If blank, the d13C of the sample was not measured by NOSAMS. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -30.15 Range_Domain_Maximum: -20.10 Attribute_Units_of_Measure: unitless ratio Attribute: Attribute_Label: D14C Attribute_Definition: D14C (Delta 14C) is the relative difference between the absolute international standard (base year 1950) and sample activity, corrected for age and d13C (delta 13C). Attribute_Definition_Source: NOSAMS (https://www2.whoi.edu/site/nosams/) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -499.08 Range_Domain_Maximum: 196.18 Attribute_Units_of_Measure: unitless Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Lauren T. Toth Contact_Organization: SOUTHEAST REGION: ST. PETE COASTAL & MARINE SC Contact_Position: Research Physical Scientist Contact_Address: Address_Type: mailing and physical Address: 600 4Th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: US Contact_Voice_Telephone: 727-502-8029 Contact_Electronic_Mail_Address: ltoth@usgs.gov Distribution_Liability: Although these data have been processed successfully on a computer system at 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. The USGS shall not be held liable for improper or incorrect use of the data described or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text, Microsoft Excel format Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9OOL3L4/data/South_Florida_mangrove_peat_radiocarbon_data.zip Fees: None Metadata_Reference_Information: Metadata_Date: 20220819 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Lauren T. Toth Contact_Organization: SOUTHEAST REGION: ST. PETE COASTAL & MARINE SC Contact_Position: Research Physical Scientist Contact_Address: Address_Type: mailing and physical Address: 600 4Th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: US Contact_Voice_Telephone: 727-502-8029 Contact_Electronic_Mail_Address: ltoth@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998