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Limestone boulders and cobbles noted 2009 to 2017 that pertain to sea floods of the past 1,000 years on Anegada, British Virgin Islands

Dates

Publication Date
Start Date
2008-03-15
End Date
2017-03-15

Citation

Atwater, Brian F., compiler, 2023, Field evidence noted in 2008 to 2023 that pertains to sea floods of the past millennium on Anegada, British Virgin Islands: U.S. Geological Survey data release, https://doi.org/10.5066/P9TLLBOC.

Summary

This part of the release provides an updated georeferenced catalog of limestone boulders and cobbles pertaining to extreme waves on Anegada, a low Caribbean island perched south of the Puerto Rico Trench. Tabulated are 660 limestone clasts, along with clast dimensions and long-axis trend in many instances. Fewer than one-fifth of the clasts were reported previously in https://doi.org/10.1007/s11069-011-9725-8 and https://doi.org/10.1130/GES01356.1. Most were surveyed in 2017.

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Limestone_clasts_example.jpg thumbnail 2.4 MB image/jpeg
Limestone_clasts.jpg thumbnail 1.79 MB image/jpeg
Limestone_clasts.csv 61.32 KB text/csv
Limestone_clasts.zip 21.93 KB application/zip

Purpose

As explained further in the Overview, the full data release is intended to support assessments of hazards from unusually large tsunamis generated in the northeast Caribbean. In an example reported previously, modelers compared simulated inundation by Puerto Rico Trench and Lisbon tsunamis with the sizes and locations of 105 limestone boulders and cobbles that had been derived and deposited onshore in central Anegada (https://doi.org/10.1007/s11069-011-9725-8). Further examples were presented in the unpublished dissertation cited below as reference 7.
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