Identification_Information: Citation: Citation_Information: Originator: Marci E. Marot Originator: Christopher G. Smith Originator: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Publication_Date: 20150801 Title: Radiochemistry Data from Sediment Cores and Surface Samples Collected in 2013 from Vermilion Bay, Louisiana Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 2015-1143 Online_Linkage: http://dx.doi.org/10.3133/ofr2015XXX/downloads/13CCT01_Radiochemistry.xlsx Larger_Work_Citation: Citation_Information: Originator: Marci E. Marot Originator: C. Scott Adams Originator: Kathryn A. Richwine Originator: Christopher G. Smith Originator: Lisa E. Osterman Publication_Date: 20150801 Title: Biological and Geochemical Data along Indian Point, Vermilion Bay, Louisiana Edition: 1.0 Geospatial_Data_Presentation_Form: multimedia presentation Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 2015-1143 Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Online_Linkage: http://dx.doi.org/10.3133/ofr20151143 Description: Abstract: Scientists from the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center collected shallow sediment cores and surface samples from a coastal salt marsh environment next to Vermilion Bay in southwest Louisiana in January 2013. The sampling was part of a larger USGS study to gather data for assessing environmental changes over the past 150 years. The objective of the study was to expand upon the historical context of sea level and storms affecting coastal systems and how these systems might change under persistent or varying conditions. The data from this report add to a regional environmental change database that aids with the continuing effort to understand the evolution of coastal systems. This report serves as an archive for sedimentological, radiochemical, and microbiological data derived from the sediment cores and surface samples. Data is available for the sampling period in January 2013. Data is available in downloadable spreadsheet, Joint Photographic Experts Group (JPEG) and Portable Document File (PDF) formats. Additional files included: ArcGIS shape files of the sample locations, detailed results of sediment grain size analyses, and formal Federal Geographic Data Committee (FDGC) metadata. Purpose: The 13CCT01_Radiochemistry.xlsx file includes all radiochemistry analysis results from back-barrier wetlands collected on or around the Vermilion Bay region of Southwest Louisiana in January 2013 by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center. Supplemental_Information: This publication contains data collected during field activity number (FAN) 13CCT01. For additional information associated with the activity, please go to http://cmgds.marine.usgs.gov/fan_info.php?fan=13CCT01. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20130119 Ending_Date: 20130119 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -92.041702 East_Bounding_Coordinate: -92.0400912 North_Bounding_Coordinate: 29.61824 South_Bounding_Coordinate: 29.617237 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: wetland Theme_Keyword: sediment Theme_Keyword: core Theme_Keyword: radiochemistry Theme_Keyword: gamma spectroscopy Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Southwest Louisiana Place_Keyword: Gulf of Mexico Place_Keyword: Vermilion Bay Place_Keyword: Indian Point Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: sediment Stratum_Keyword: subsurface Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: January 2013 Access_Constraints: none Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Contact_Person: Marci E. Marot Contact_Position: Geologist 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) 502-8057 Contact_Electronic_Mail_Address: mmarot@usgs.gov Data_Set_Credit: U.S. Geological Survey Native_Data_Set_Environment: Microsoft Windows 7 Enterprise Service Pack 1; Microsoft Excel Version 2010 Use_Constraints: The U.S. Geological Survey requests that it be referenced as the originator of this dataset in any future products or research derived from these data. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The radioisotopic activities reported in the Excel spreadsheets include the counting error for all samples. The critical level is also reported for each core set. Logical_Consistency_Report: Each spreadsheet includes core-specific data include sample depth interval in core (cm), date of collection, Be-7 activity and error, Cs-137 activity and error, Pb-210 activity and error, Ra-226 activity and error, Th-234 activity and error, K-40 activity and error. Completeness_Report: This is a complete processed radiochemistry data file for the 13CCT01-M01, -M02, and -M03 core series archive. Lineage: Process_Step: Process_Description: Core lengths varied from 45 to 53 cm and compaction was less than ten cm in all cores. Cores were stored cold, upright and returned to the St. Petersburg Coastal and Marine Science Center where they were sub-sectioned. Cores were sectioned at 1-cm interval over the entire length of the core. Process_Date: 2013 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Person: Marci E. Marot Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: (727) 502-8057 Contact_Electronic_Mail_Address: mmarot@usgs.gov Process_Step: Process_Description: Each subsample (approximately 80 g of wet sediment) was oven-dried at 60 °C for 48 hours. The dried sediment was homogenized to a fine powder with a porcelain mortar and pestle. Dried ground sediments (15–30 g) were sealed in airtight polypropylene containers. The sample weights and counting container geometries were matched to pre-determined calibration standards. The sealed samples sat for a minimum of 3 weeks to allow Ra-226 to come into secular equilibrium with its daughter isotopes Pb-214 and Bi-214. The sealed samples were then counted for 48–72 hours on a planar-style, low energy, high-purity germanium, gamma-ray spectrometer (Canberra Industries, Inc., http://www.canberra.com/). The standard suite of naturally-occurring and anthropogenic radioisotopes measured at the SPCMSC radioisotope lab along with their corresponding photopeak energies in kiloelectron volts (keV) are Pb-210 (46.5 keV), Th-234 (63.3 keV), Pb-214 (295.7 and 352.5 keV; proxies for Ra-226), Be-7 (477.6 keV), Bi-214 (609.3 keV; proxy for Ra-226), Cs-137 (661.6 keV), and K-40 (1640.8 keV). Sample count rates were corrected for detector efficiency determined with IAEA RGU-1 reference material, standard photopeak intensity, and self-absorption using a U-238 sealed source (Cutshall and others, 1983). Process_Date: 2013 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Person: Marci E. Marot Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: (727) 502-8057 Contact_Electronic_Mail_Address: mmarot@usgs.gov Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Core ID Entity_Type_Definition: Gamma spectroscopy radiochemistry results of sediment push cores collected from Vermillon Bay in southwest Louisiana. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: Depth (cm) Attribute_Definition: Sample interval depth measured from top of the core (cm) Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 53 Attribute: Attribute_Label: Be-7 Activity (pCi/g) Attribute_Definition: Beryllium-7 specific activity measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: Not detected Range_Domain_Maximum: Not detected Attribute: Attribute_Label: Be-7 Error (+/- pCi/g) Attribute_Definition: Beryllium-7 specific activity counting error measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: Null Range_Domain_Maximum: Null Attribute: Attribute_Label: Cs-137 Activity (pCi/g) Attribute_Definition: Cesium-137 specific activity measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: Not detected Range_Domain_Maximum: 1.03 Attribute: Attribute_Label: Cs-137 Error (+/- pCi/g) Attribute_Definition: Cesium-137 specific activity counting error measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: Null Range_Domain_Maximum: 0.05 Attribute: Attribute_Label: Pb-210 Activity (pCi/g) Attribute_Definition: Lead-210 specific activity measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.83 Range_Domain_Maximum: 2.63 Attribute: Attribute_Label: Pb-210 Error (+/- pCi/g) Attribute_Definition: Lead-210 specific activity counting error measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.09 Range_Domain_Maximum: 0.23 Attribute: Attribute_Label: Ra-226 Activity (pCi/g) Attribute_Definition: Radium-226 specific activity measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.69 Range_Domain_Maximum: 0.99 Attribute: Attribute_Label: Ra-226 Error (+/- pCi/g) Attribute_Definition: Radium-226 specific activity counting error measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.03 Range_Domain_Maximum: 0.07 Attribute: Attribute_Label: Th-234 Activity (pCi/g) Attribute_Definition: Thorium-234 specific activity measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.03 Range_Domain_Maximum: 2.52 Attribute: Attribute_Label: Th-234 Error (+/- pCi/g) Attribute_Definition: Thorium-234 specific activity counting error measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.11 Range_Domain_Maximum: 0.37 Attribute: Attribute_Label: K-40 Activity (pCi/g) Attribute_Definition: Potassium-40 specific activity measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 14.94 Range_Domain_Maximum: 19.58 Attribute: Attribute_Label: K-40 Error (+/- pCi/g) Attribute_Definition: Potassium-40 specific activity counting error measured in picocuries per gram of dry sediment at the date of field sample collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.58 Range_Domain_Maximum: 1.24 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Person: Marci E. Marot Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: 502-8057 Contact_Electronic_Mail_Address: mmarot@usgs.gov Distribution_Liability: This publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Standard_Order_Process: Fees: none Digital_Form: Digital_Transfer_Information: Format_Name: Microsoft Excel Worksheet 2010 Format_Version_Number: 1 Format_Specification: .xlsx Transfer_Size: 0.035 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.3133/ofr20151143/images/tables/13CCT01_Radiochemistry.xlsx Resource_Description: Downloadable data Custom_Order_Process: none Technical_Prerequisites: The spreadsheet, 13CCT01_Radiochemistry.xlsx, was created for use with Microsoft Excel 2010. It may also be viewed with the Microsoft Excel viewer or by downloading a Microsoft Compatibility Pack to view with older versions of Microsoft Excel. Metadata_Reference_Information: Metadata_Date: 20150701 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Person: Marci E. Marot Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: (727) 502-8057 Contact_Electronic_Mail_Address: mmarot@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None Metadata_Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.