Any spurious data points were removed during creation of the spreadsheet file. The data are related to whole-core or grab sample determinations.
This report contains all the samples collected during 2008. There are missing core numbers because each site was given a number regardless if it was a failure or a success. The 27 successful sites from the R/V Seward Johnson 2008 cruise were: 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 17, 18, 20, 21, 22, 23, 24, 28, 31, 32, 33, 34, 35, 38, and 40. There are eleven archive cores from LDEO that had radiocarbon age dates in the area of investigation. These were: RC08-115, RC08-116, RC08-118, RC09-38, RC09-39, RC09-40, RC09-42, RC09-43, VM20-002, VM22-18, and VM24-261.
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The 2008 latitude and longitude were taken from the R/V Seward Johnson's DGPS system which gives about 20 centimeter accuracy. The location of the archive cores were provided through the NGDC log report. Since these cores were collected in the 1960's we assume they used a LORAN navigation system. The LORAN system has less accuracy than the DGPS. Because of the variety of horizontal datums of the originally collected data, the horizontal datum will be defined as WGS 84 to agree with the most recent and largest concentration of the data.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The R/V Seward Johnson was not equipped with a multibeam echosounder during the 2008 cruise. The depths were taken from a 50 m resolution grid bathymetric map with a Instantaneous Sea Level datum (Andrews and others, PR Bathymetry OFR (in prep)). Where cores fell outside the bathymetry map, the depth was taken from the 3.5 kHz echosounder (local surface). The depths for the archive cores were provided through their original report. We cannot be sure of what system was used to get depths, however we compared the reported depth with the same bathymetric grid and the greatest difference in depth was 660 meters for the RC08-118 core. The rest of the archive cores had no more than a 100 meter difference. Because of the variety and uncertainty of the depth information, the vertical datum will be defined as Instantaneous Sea Level, as defined in (Andrews and others, in prep).
Source_Information:
Source_Citation:
Citation_Information:
Originator: NGDC
Publication_Date: Unknown
Title:
Robert Conrad Cruise 08- Preliminary Megascopic Descriptions of Split Cores
Edition: 1.0
Other_Citation_Details:
Original core descriptions provided by Lamont-Doherty Earth Observatory and released by NGDC. MGG id: 01015088
Online_Linkage:
Type_of_Source_Media: Online data download
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19640521
Ending_Date: 19640523
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: NGDC_RC08
Source_Contribution:
Core descriptions, photos, and general information about core site (Latitude, Longitude, Depth, etc.) for RC08-115, RC08-116, and RC08-118.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NGDC
Publication_Date: Unknown
Title:
Robert Conrad Cruise 09- Preliminary Megascopic Descriptions of Split Cores
Edition: 1.0
Other_Citation_Details:
Original core descriptions provided by Lamont-Doherty Earth Observatory and released by NGDC. MGG id: 01015009
Online_Linkage:
Type_of_Source_Media: Online data download
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19641215
Ending_Date: 19641222
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: NGDC_RC09
Source_Contribution:
Core descriptions, photos, and general information about core site (Latitude, Longitude, Depth, etc.) for RC09-38, RC09-39, RC09-40, RC09-42, and RC09-43.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NGDC
Publication_Date: Unknown
Title:
Vema Cruise 20 - Preliminary Megascopic Descriptions of Split Cores
Edition: 1.0
Other_Citation_Details:
Original core descriptions provided by Lamont-Doherty Earth Observatory and released by NGDC. MGG id: 01035020
Online_Linkage:
Type_of_Source_Media: Online data download
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19640302
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: NGDC_VM20
Source_Contribution:
Core descriptions, photos, and general information about core site (Latitude, Longitude, Depth, etc.) for VM20-002.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NGDC
Publication_Date: Unknown
Title:
Vema Cruise 22 - Preliminary Megascopic Descriptions of Split Cores
Edition: 1.0
Other_Citation_Details:
Original core descriptions provided by Lamont-Doherty Earth Observatory and released by NGDC. MGG id: 01035022
Online_Linkage:
Type_of_Source_Media: Online data download
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19660126
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: NGDC_VM22
Source_Contribution:
Core descriptions, photos, and general information about core site (Latitude, Longitude, Depth, etc.) for VM22-18.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NGDC
Publication_Date: Unknown
Title:
Vema Cruise 24 - Preliminary Megascopic Descriptions of Split Cores
Edition: 1.0
Other_Citation_Details:
Original core descriptions provided by Lamont-Doherty Earth Observatory and released by NGDC. MGG id: 01035024
Online_Linkage:
Type_of_Source_Media: Online data download
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19671210
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: NGDC_VM24
Source_Contribution:
Core descriptions, photos, and general information about core site (Latitude, Longitude, Depth, etc.) for VM24-261.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Andrews, B.D.
Originator: ten Brink, U.S.
Originator: Danforth, W.W.
Originator: Chaytor, J.D.
Originator: Granja Burna, J.L.
Originator: Llanes Estrada, P.
Originator: Carbo-Gorosabel, A.
Publication_Date: 2014
Title:
Bathymetric Terrain Model of Puerto Rico Trench and the Northeast Caribbean Region: Marine Geological Investigations
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2013-1125
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.3133/ofr20131125
Type_of_Source_Media: Open File Report
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2014
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: PR Bathymetry
Source_Contribution:
The 50 meter grid was used for depth information in the sample area
Source_Information:
Source_Citation:
Citation_Information:
Originator: Shannon K. Hoy
Originator: Jason D. Chaytor
Originator: Uri S. ten Brink
Publication_Date: 2014
Title: Core data from offshore Puerto Rico and the U.S. Virgin Islands
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2014-1227
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/of/2014/1227/
Type_of_Source_Media: physical samples
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20080317
Ending_Date: 20080324
Source_Currentness_Reference: ground condition of core collection
Source_Citation_Abbreviation: GGC
Source_Contribution:
The gravity cores collected during U.S. Geological Survey field activity 2008-008-FA. The Woods Hole Oceanographic Giant Gravity Corer (GGC) was used to collect the 20 cores in 2008. The gravity corer is a large diameter (10 centimeter) sampler that collects cores up to 6.5 meters in length. During field activity 2008-008-FA the corer was not rigged with liner longer than approximately 3 meters. Although cores were attempted at 40 core sites, core was recovered at only 20 sites. Seven additional sites yielded only samples (bagged) from the core catcher or cutting head. Of the 20 successful cores, three also have cutter/catcher bag samples.
Process_Step:
Process_Description:
For the 2008 SJ8 cores, core locations from the R/V Seward Johnson's DGPS system were recorded in the PRcore_locations spreadsheet (Microsoft Office Excel 2010) along with water depth information, field notes, cruise information, and core length. Jason Chaytor performed this and the subsequent process steps, unless otherwise noted.
Process_Date: 2013
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jason D. Chaytor
Contact_Organization: U.S. Geological Survey
Contact_Position: Research Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2351
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: jchaytor@usgs.gov
Process_Step:
Process_Description:
Archive core log sheets were downloaded from NGDC and core information and location were entered into the PRcore_locations spreadsheet (Microsoft Excel 2010). These depths were taken from the original log sheets from the attribute "Corr. depth" which is the "P.D.R depth" converted from fathoms to meters and corrected for sound velocity.
Source_Used_Citation_Abbreviation: NGDC_RC08
Source_Used_Citation_Abbreviation: NGDC_RC09
Source_Used_Citation_Abbreviation: NGDC_VM20
Source_Used_Citation_Abbreviation: NGDC_VM22
Source_Used_Citation_Abbreviation: NGDC_VM24
Process_Date: 2013
Process_Step:
Process_Description:
2008 Gravity core and archive core information was exported from the spreadsheet (Microsoft Office Excel 2010) as a comma-separated value (CSV) file and imported to ArcCatalog (version 9.3) by right clicking on the CSV file and selecting 'create feature class' --> from XY table'. Parameters for import are: X Field- Long_DD and Y Field- Lat_DD. This process created and Esri point shapefile where each sample is a unique record with core specific attributes
Process_Date: 2013
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Shannon K. Hoy
Contact_Organization: U.S. Geological Survey
Contact_Position: Research Associate
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2297
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: shoy@usgs.gov
Process_Step:
Process_Description:
Additional fields were added to the point shapefile and populated. These additional fields contain information regarding what subsampling occurred on the core including MSCL, XRF, radiographs, grain-size, and radiocarbon dating. Other fields include the presence or absence of core summary sheets and sample type (core, archive, or bag).
Process_Date: 2013
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Shannon K. Hoy
Contact_Organization: U.S. Geological Survey
Contact_Position: Research Associate
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2297
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: shoy@usgs.gov
Process_Step:
Process_Description:
Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Added additional online links in the Identification section. Updated a cross-reference citation to go from "in prep" to published. In the case of the depth resolution, the value of 9999 was entered to indicate that the original metadata did not contain the required information. Minor fixes to the attribute format for some attributes were needed to meet the standard. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.
Process_Date: 20171003
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description: USGS Thesaurus keywords added to the keyword section.
Process_Date: 20180720
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20200908
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
