Presence and absence of a widespread unit of Holocene marine sand observed in 2008 to 2017 in tsunami-hazard assessments on Anegada, British Virgin Islands

This part of the data release provides an updated georeferenced guide to the main unit of Holocene sand ascribed to a sea flood on Anegada. Much of the data was previously summarized in Figure A4 of https://doi.org/10.1130/GES01356.1 . Plotted here, on the accompanying map, are all 573 localities in the updated compilation <Sand_main.csv>—nearly half of which do not provide much if any evidence for marine inundation. The main attribute of each locality is one of four summary categories:
Pervasive—Sand covers more than 3/4 of area and typically thicker than 5 cm (132 localities). Patchy—Sand covers less than 3/4 of area and typically thinner than 5 cm (185 localities). Scant—Called “Sand scarce or absent” in https://doi.org/10.1130/GES01356.1 (256 localities). Pleistocene—Sand grains evidently weathered from Pleistocene limestone (23 localities). The sand, particularly where pervasive, commonly accompanies coral erratics and anomalous limestone clasts. Where patchy it extends farther inland than they do. Locally this mapping is ambiguous. Some of the sand has probably been redistributed by wind. The sand designated Pleistocene includes, in a correction, 8 sites mistakenly interpreted in https://doi.org/10.1130/GES01356.1 as Holocene marine sand.