Radiocarbon ages measured 2011 to 2021 on corals, shells, and plant fragments pertaining to sea floods of the past 1,000 years on Anegada, British Virgin Islands

This part of the data release provides an updated georeferenced list of radiocarbon ages pertaining to evidence for a catastrophic precolonial sea flood on Anegada, a low Caribbean island perched south of the Puerto Rico Trench. The list contains 64 ages measured on carbonate materials and 3 ages measured on plant fragments. Among the total of 67 ages, 43 are among the 47 ages previously tabulated on page 318 of https://doi.org/10.1130/GES01356.l. The 67 ages exclude those from previous work on deposits attributable to the 1755 Lisbon tsunami (https://doi.org/10.1007/s11069-010-9622-6). Among the 67 ages listed, the 24 ages previously unreported were measured mainly on samples collected in 2017. The main material dated is the aragonitic skeleton of coral boulders, particularly of the brain coral Pseudodiploria strigosa. Also dated are shells of the marine bivalve Codakia orbicularis (tiger lucine) and of the iconic Caribbean gastropod Aliger gigas (queen conch). All 67 ages were measured by the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) laboratory in Woods Hole, Massachusetts. One pair of columns give the ages and one-standard-deviation error as reported, rounded to the nearest 5 radiocarbon years). A second pair expand the error term by adding variance, sample-by-sample, using a procedure described by the NOSAMS Staff (https://www2.whoi.edu/site/nosams/client-services/radiocarbon-data-calculations/). The added variance increases the error terms by factors ranging from 1.1 to 1.8, and averaging 1.4.

                                            [
  "010:12"
]
                                        

                                            {
  "fn": "Brian F Atwater",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:atwater@usgs.gov"
}
                                        

                                            [
  {
    "@type": "dcat:Distribution",
    "title": "Digital Data",
    "format": "XML",
    "accessURL": "https://doi.org/10.5066/P9TLLBOC",
    "mediaType": "application/http",
    "description": "Landing page for access to the data"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Original Metadata",
    "format": "XML",
    "mediaType": "text/xml",
    "description": "The metadata original format",
    "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.64929d23d34ef77fcb008df0.xml"
  }
]
                                        

                                            [
  "British Virgin Islands",
  "Caribbean Sea",
  "USGS:64929d23d34ef77fcb008df0",
  "biota",
  "bivalves",
  "carbon-14 analysis",
  "corals",
  "gastropods",
  "geoscientificInformation"
]
                                        

                                            {
  "name": "U.S. Geological Survey",
  "@type": "org:Organization"
}
                                        

                                            [
  "Geospatial"
]