Central Alaska Cosmogenic Isotope Burial Age Data Collected 2020-2022

Identification_Information:

Citation:

Citation_Information:

Originator: Bender, Adrian M. (ORCID: 0000-0001-7469-1957)
Publication_Date: 20230815
Title:

Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:

Publication_Place: Anchorage, Alaska
Publisher: U.S. Geological Survey, Alaska Science Center

Other_Citation_Details:

Suggested Citation: Bender, A.M, 2023, Central Alaska cosmogenic isotope burial age data collected 2020-2022: U.S. Geological Survey data release, https://doi.org/10.5066/P9HX0MJ1

Online_Linkage: https://doi.org/10.5066/P9HX0MJ1
Larger_Work_Citation:

Citation_Information:

Originator: U.S. Geological Survey, Alaska Science Center
Publication_Date: 2015
Title:

Tectonic and metallogenic evolution of the eastern Yukon-Tanana upland, Alaska

Geospatial_Data_Presentation_Form: Website
Series_Information:

Series_Name: Science Portal
Issue_Identification: 389

Publication_Information:

Publication_Place: Anchorage, Alaska
Publisher: U.S. Geological Survey, Alaska Science Center

Other_Citation_Details:

This is a link to the broader USGS Alaska Science Center research project supported by these data. Users will find a description of the research project and links to associated reports, publications, and data products.

Online_Linkage: https://alaska.usgs.gov/portal/project.php?project_id=389

Description:

Abstract:

This data release includes three tables containing cosmogenic beryllium-10 and aluminum-26 concentrations and related data from samples collected at four sites in central Alaska in 2020, prepared in 2022 at the University of Vermont (UVM), and measured at the Purdue Rare Isotope Measurement lab (PRIME) in 2022. The file "geology_siteLocations_centralAK_bender.csv" contains site locations in the NAD83 reference frame, and burial ages computed from raw data contained in the other files. All files are linked by the site_id_short field.

Purpose:

This dataset was developed for the purpose of dating the deposition of (1) ancient gravels on terraces along Birch and Beaver Creeks, which are Yukon River tributaries that drain the minerally endowed Yukon-Tanana upland in central Alaska, and (2) the uppermost Nenana Gravel along the northern Alaska Range front in the Tanana basin. All of these sites are located in central Alaska, United States.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2020
Ending_Date: 2022

Currentness_Reference: observed

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -148.8260
East_Bounding_Coordinate: -144.1318
North_Bounding_Coordinate: 65.8279
South_Bounding_Coordinate: 64.2060

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:ASC550

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: GeoscientificInformation

Theme:

Theme_Keyword_Thesaurus: NASA GCMD Earth Science Keyword Thesaurus
Theme_Keyword: Aluminum-26 analysis
Theme_Keyword: Beryllium-10 analysis
Theme_Keyword: Erosion
Theme_Keyword: Sediments
Theme_Keyword: Stream terrace
Theme_Keyword: Sedimentation
Theme_Keyword: Downcutting
Theme_Keyword: Landscape processes

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: Geochronology
Theme_Keyword: Geology
Theme_Keyword: Geomorphology

Place:

Place_Keyword_Thesaurus: USGS Geographic Names Information System (GNIS)
Place_Keyword: Alaska
Place_Keyword: Birch Creek
Place_Keyword: Beaver Creek
Place_Keyword: Yukon River
Place_Keyword: Tanana River
Place_Keyword: Totatlanika River

Access_Constraints: None
Use_Constraints:

It is requested that the authors and the USGS Alaska Science Center be cited for any subsequent publications that reference this dataset.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Alaska Science Center

Contact_Address:

Address_Type: Mailing and Physical
Address: 4210 University Drive
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99508
Country: USA

Contact_Voice_Telephone: 907-786-7000
Contact_Electronic_Mail_Address: ascweb@usgs.gov

Cross_Reference:

Citation_Information:

Ongoing Bedrock Incision of the Fortymile River Driven by Pliocene-Pleistocene Yukon River Capture, Eastern Alaska, USA, and Yukon, Canada

Geospatial_Data_Presentation_Form: journal article
Series_Information:

Series_Name: Geology
Issue_Identification: 46(7):635-638

Publication_Information:

Publication_Place: Online
Publisher: The Geological Society of America

Other_Citation_Details:

Bender, A.M., Lease, R.O., Corbett, L.B., Bierman, P. and Caffee, M.W., 2018. Ongoing bedrock incision of the Fortymile River driven by Pliocene-Pleistocene Yukon River capture, eastern Alaska, USA, and Yukon, Canada. Geology 46(7):35-638 doi:10.1130/G40203.1

Online_Linkage: https://doi.org/10.1130/G40203.1

Cross_Reference:

Citation_Information:

Originator: Bender, A.M. (ORCID: 0000-0001-7469-1957)
Originator: Lease, R.O. (ORCID: 0000-0003-2582-8966)
Originator: Corbett, L.B.
Originator: Bierman, P.R.
Originator: Caffee, M.W.
Originator: Rittenour, T.M.
Publication_Date: 2020
Title:

Late Cenozoic climate change paces landscape adjustments to Yukon River capture

Geospatial_Data_Presentation_Form: journal article
Series_Information:

Series_Name: Nature Geoscience
Issue_Identification: 13(8):571-575

Publication_Information:

Publication_Place: Online
Publisher: Springer Nature

Other_Citation_Details:

Bender, A.M., Lease, R.O., Corbett, L.B., Bierman, P.R., Caffee, M.W., Rittenour, T.M., 2020. Late Cenozoic climate change paces landscape adjustments to Yukon River capture. Nature Geoscience 13(8):571-575 doi:10.1038/s41561-020-0611-4

Online_Linkage: https://doi.org/10.1038/s41561-020-0611-4

Cross_Reference:

Citation_Information:

Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma

Geospatial_Data_Presentation_Form: publication
Series_Information:

Series_Name: Earth Surface Dynamics
Issue_Identification: 10(5):1041–1053

Publication_Information:

Publication_Place: online
Publisher: Copernicus GmbH on behalf of the European Geosciences Union

Other_Citation_Details:

Bender, A.M., Lease, R.O., Corbett, L.B., Bierman, P.R., Caffee, M.W., Jones, J.V., Kreiner, D.C., 2022. Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma. Earth Surface Dynamics 10(5):1041–1053 doi:10.5194/esurf-10-1041-2022

Online_Linkage: https://doi.org/10.5194/esurf-10-1041-2022

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Analytical uncertainties of measured quantities reported at the 1-sigma range.

Logical_Consistency_Report: No unexpected values are used in the data.
Completeness_Report: This data set is complete; no data were omitted.
Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Horizontal location information was obtained from handheld GPS unit with horizontal accuracy of about five meters and is reported in the NAD83 reference frame.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Bender, A.M.
Originator: Lease, R.O.
Originator: Corbett, L.B.
Originator: Bierman, P.R.
Originator: Caffee, M.W.
Originator: Jones, J.V.
Originator: Kreiner, D.
Publication_Date: 2022
Title:

Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma

Geospatial_Data_Presentation_Form: journal article
Series_Information:

Series_Name: Earth Surface Dynamics
Issue_Identification: 10(5):1041–1053

Publication_Information:

Publication_Place: online
Publisher: Copernicus GmbH on behalf of the European Geosciences Union

Other_Citation_Details:

Online_Linkage: https://doi.org/10.5194/esurf-10-1041-2022

Type_of_Source_Media: publication
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2022

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Bender et al., 2022
Source_Contribution:

Detailed descriptions of and references for the collection, treatment, and analysis of samples and data contained herein.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Bierman, P. R.
Originator: Corbett, L. B.
Publication_Date: 2022
Title:

National Science Foundation/University of Vermont Community Cosmogenic Facility

Geospatial_Data_Presentation_Form: tabular digital data
Online_Linkage: https://www.uvm.edu/cosmolab/

Type_of_Source_Media: laboratory
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2018
Ending_Date: 2028

Source_Currentness_Reference: observed

Source_Citation_Abbreviation: NSF/UVM CCF
Source_Contribution: cosmogenic isotope sample preparation

Source_Information:

Source_Citation:

Citation_Information:

Originator: Caffee, Marc W.
Publication_Date: 2022
Title: Purdue Rare Isotope Measurement Laboratory
Geospatial_Data_Presentation_Form: tabular digital data
Online_Linkage: https://www.physics.purdue.edu/primelab/

Type_of_Source_Media: laboratory
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2022

Source_Currentness_Reference: observed

Source_Citation_Abbreviation: PRIME Lab
Source_Contribution:

accelerator mass spectrometry measurement of cosmogenic isotopes

Process_Step:

Process_Description:

Cosmogenic isochron burial dating - A fully referenced description of this method appears in (Bender et al., 2022). The isochron method requires sampling quartz-bearing sedimentary material archiving a range of pre-burial isotope concentrations at a single depth horizon (indicative of common burial history) buried by several meters of sediment, to minimize post-burial production of each isotope. Samples were collected from shallow hand-dug pits (sample horizons 2-3 meters deep). Samples were prepared at the University of Vermont. The Aluminum-26/Aluminum-27 and Beryllium-10/Beryllium-9 ratios were measured via accelerator mass spectrometry at the Purdue Rare Isotope Measurement Laboratory in several runs in 2022. Each isotope measurement was corrected for background isotope levels by subtracting the average of blank measurements (Bender et al., 2022).

Source_Used_Citation_Abbreviation: Bender et al., 2022
Source_Used_Citation_Abbreviation: NSF/UVM CCF
Source_Used_Citation_Abbreviation: PRIME Lab
Process_Date: 2021

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0001
Longitude_Resolution: 0.0001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983 (NAD 83)
Ellipsoid_Name: Geodetic Reference System 1980 (GRS 1980)
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 1.00
Altitude_Distance_Units: meters
Altitude_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: geology_siteLocations_centralAK_bender.csv
Entity_Type_Definition:

Table with details of sampling site locations. Presented in a Comma Separated Value (CSV) formatted table.

Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: site_id_short
Attribute_Definition:

Short, unique alphanumeric site identifier consisting of two letters indicative of the site location and a number. Corresponds to the 'site_id_short' attribute in all tables included with this data package.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BC1
Enumerated_Domain_Value_Definition: Beaver Creek site 1.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BC2
Enumerated_Domain_Value_Definition: Beaver Creek site 2.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ1
Enumerated_Domain_Value_Definition: Circle quarry site 1.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ2
Enumerated_Domain_Value_Definition: Circle quarry site 2.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ3
Enumerated_Domain_Value_Definition: Circle quarry site 3.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ4
Enumerated_Domain_Value_Definition: Circle quarry site 4.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: NG1
Enumerated_Domain_Value_Definition: Nenana Gravel site 1.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute:

Attribute_Label: lat_nad83
Attribute_Definition: Latitude in decimal degrees; datum NAD83.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 64.206
Range_Domain_Maximum: 65.8279
Attribute_Units_of_Measure: Decimal degree (NAD83)
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: long_nad83
Attribute_Definition: Longitude in decimal degrees; datum NAD83.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -148.826
Range_Domain_Maximum: -144.1318
Attribute_Units_of_Measure: Decimal degree (NAD83)
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: elevation
Attribute_Definition: Elevation, or orthometric height above sea level.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 253
Range_Domain_Maximum: 460
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: age
Attribute_Definition:

Depositional age in millions of years computed as described under process steps and in source lineage. Values of -9999 represent no-data entries where the data do not comply with current burial age equations.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.84
Range_Domain_Maximum: 3.68
Attribute_Units_of_Measure: millions of years
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: age_err
Attribute_Definition:

Uncertainty (1-sigma) of depositional age in millions of years computed as described under process steps and in source lineage. Values of -9999 represent no-data entries where the data do not comply with current burial age equations.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.20
Range_Domain_Maximum: 0.36
Attribute_Units_of_Measure: millions of years
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: height
Attribute_Definition:

Height in meters of terrace tread above modern river channel. Values of -9999 represent no-data (the single entry of -9999 occurs for a sample collected from a gravel deposit that is unrelated to a modern river channel and hence height cannot be directly determined as for the other samples).

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 50
Range_Domain_Maximum: 175
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: thickness
Attribute_Definition: Measured gravel thickness in meters.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3.0
Range_Domain_Maximum: 150.0
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: depth
Attribute_Definition:

Depth in meters of the bottom of the approximately 30 cm-thick sample horizon below the landform surface.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2.4
Range_Domain_Maximum: 23.0
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.1

Detailed_Description:

Entity_Type:

Entity_Type_Label: geology_burialDating_aluminum26_centralAK_bender.csv
Entity_Type_Definition:

Table with measurements of aluminum isotope concentations. Presented in a Comma Separated Value (CSV) formatted table.

Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: site_id_short
Attribute_Definition:

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BC1
Enumerated_Domain_Value_Definition: Beaver Creek site 1.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BC2
Enumerated_Domain_Value_Definition: Beaver Creek site 2.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ1
Enumerated_Domain_Value_Definition: Circle quarry site 1.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ2
Enumerated_Domain_Value_Definition: Circle quarry site 2.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ3
Enumerated_Domain_Value_Definition: Circle quarry site 3.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ4
Enumerated_Domain_Value_Definition: Circle quarry site 4.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: NG1
Enumerated_Domain_Value_Definition: Nenana Gravel site 1.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute:

Attribute_Label: sample_id
Attribute_Definition:

Unique alphanumeric sample identifier consisting of site_id_short appended by a number.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain:

See column definition and enumerated domain value definitions for the site_id_short field.

Attribute:

Attribute_Label: qtz_mass_g
Attribute_Definition:

Mass of quartz aliquot from which aluminum-26 and/or beryllium-10 have been extracted and measured.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 5.0217
Range_Domain_Maximum: 22.1709
Attribute_Units_of_Measure: grams

Attribute:

Attribute_Label: total_27Al_ug
Attribute_Definition: Total aluminum-27 measured in sample.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1286.6915
Range_Domain_Maximum: 4776.0141
Attribute_Units_of_Measure: micrograms
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: uncorr_26Al_27Al
Attribute_Definition:

Isotope ratio of aluminum-26 to aluminum-27, not corrected for background aluminum-26. Values given in scientific notation.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7.53e-15
Range_Domain_Maximum: 3.32e-13
Attribute_Units_of_Measure: dimensionless ratio

Attribute:

Attribute_Label: uncorr_26Al_27Al_err
Attribute_Definition:

Uncertainty (1-sigma) of isotope ratio aluminum-26 to aluminum-27 not corrected for background aluminum-26. Values given in scientific notation.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.51e-15
Range_Domain_Maximum: 1.50e-14
Attribute_Units_of_Measure: dimensionless ratio

Attribute:

Attribute_Label: corr_26Al_27Al
Attribute_Definition:

Isotope ratio of aluminum-26 to aluminum-27 corrected for background aluminum-26 via blank subtraction described in Bender and others, 2022. Values given in scientific notation.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7.00e-15
Range_Domain_Maximum: 3.32e-13
Attribute_Units_of_Measure: dimensionless ratio

Attribute:

Attribute_Label: corr_26Al_27Al_err
Attribute_Definition:

Uncertainty (1-sigma) of isotope ratio aluminum-26 to aluminum-27 corrected for background aluminum-26. Values given in scientific notation.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.53e-15
Range_Domain_Maximum: 1.5e-14
Attribute_Units_of_Measure: dimensionless ratio

Attribute:

Attribute_Label: conc_26Al_atoms_g
Attribute_Definition: Concentration of aluminum-26 in quartz aliquot.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 84238.1471
Range_Domain_Maximum: 916582.0397
Attribute_Units_of_Measure: atoms per gram
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: conc_26Al_atoms_g_err
Attribute_Definition:

Uncertainty (1-sigma) of concentration of aluminum-26 in quartz aliquot.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 5529.9136
Range_Domain_Maximum: 34789.1285
Attribute_Units_of_Measure: atoms per gram
Attribute_Measurement_Resolution: 0.0001

Detailed_Description:

Entity_Type:

Entity_Type_Label: geology_burialDating_beryllium10_centralAK_bender.csv
Entity_Type_Definition:

Table with measurements of beryllium isotope concentations. Presented in a Comma Separated Value (CSV) formatted table.

Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: site_id_short
Attribute_Definition:

Short, unique alphanumeric site identifier consisting of two letters indicative of the site location and a number. Presented in a Comma Separated Value (CSV) formatted table.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BC1
Enumerated_Domain_Value_Definition: Beaver Creek site 1.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BC2
Enumerated_Domain_Value_Definition: Beaver Creek site 2.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ1
Enumerated_Domain_Value_Definition: Circle Quarry site 1.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ2
Enumerated_Domain_Value_Definition: Circle Quarry site 2.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ3
Enumerated_Domain_Value_Definition: Circle Quarry site 3.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CQ4
Enumerated_Domain_Value_Definition: Circle Quarry site 4.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: NG1
Enumerated_Domain_Value_Definition: Nenana Gravel site 1.
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute:

Attribute_Label: sample_id
Attribute_Definition:

Unique alphanumeric sample identifier consisting of site_id_short appended by a number.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain:

See column definition and enumerated domain value definitions for the site_id_short field.

Attribute:

Attribute_Label: qtz_mass_g
Attribute_Definition:

Mass of quartz aliquot from which aluminum-26 and/or beryllium-10 have been extracted and measured.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 5.0217
Range_Domain_Maximum: 22.1709
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: mass_9Be_added_ug
Attribute_Definition:

Mass of beryllium-9 added to sample during preparation at the University of Vermont.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 249.5383
Range_Domain_Maximum: 282.3000
Attribute_Units_of_Measure: micrograms
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: uncorr_10Be_9Be
Attribute_Definition:

Isotope ratio of beryllium-10 to beryllium-9, not corrected for background beryllium-10. Values given in scientific notation.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.68e-14
Range_Domain_Maximum: 2.75e-13
Attribute_Units_of_Measure: dimensionless ratio

Attribute:

Attribute_Label: uncorr_10Be_9Be_err
Attribute_Definition:

Uncertainty (1-sigma) of isotope ratio beryllium-10 to beryllium-9 not corrected for background beryllium-10. Values given in scientific notation.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.65e-15
Range_Domain_Maximum: 9.30e-15
Attribute_Units_of_Measure: dimensionless ratio

Attribute:

Attribute_Label: corr_10Be_9Be
Attribute_Definition:

Isotope ratio of beryllium-10 to beryllium-9 corrected for background beryllium-10 via blank subtraction described in Bender et al. (2022). Values given in scientific notation.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.33e-14
Range_Domain_Maximum: 2.71e-13
Attribute_Units_of_Measure: dimensionless ratio

Attribute:

Attribute_Label: corr_10Be_9Be_err
Attribute_Definition:

Uncertainty (1-sigma) of isotope ratio beryllium-10 to beryllium-9 corrected for background beryllium-10. Values given in scientific notation.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.81e-15
Range_Domain_Maximum: 9.33e-15
Attribute_Units_of_Measure: dimensionless ratio

Attribute:

Attribute_Label: conc_10Be_atoms_g
Attribute_Definition: Concentration of beryllium-10 in quartz aliquot.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 27033.2092
Range_Domain_Maximum: 208888.1733
Attribute_Units_of_Measure: atoms per gram
Attribute_Measurement_Resolution: 0.00000001

Attribute:

Attribute_Label: conc_10Be_atoms_g_err
Attribute_Definition:

Uncertainty (1-sigma) of concentration of beryllium-10 in quartz aliquot.

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2010.4506
Range_Domain_Maximum: 7196.4346
Attribute_Units_of_Measure: atoms per gram
Attribute_Measurement_Resolution: 0.00000001

Central Alaska Cosmogenic Isotope Burial Age Data Collected 2020-2022

Metadata: