Field evidence noted in 2008 to 2023 that pertains to sea floods of the past millennium on Anegada, British Virgin Islands

This release provides inventories of georeferenced evidence pertaining to extreme waves on Anegada, a low Caribbean island perched south of the Puerto Rico Trench: CORAL BOULDERS AND COBBLES -- Derived offshore, found inland. Boulder star coral Orbicella franksii (37 localities), brain coral Pseudodiploria strigosa (171), elkhorn coral Acropora palmata (36), mustard hill coral Porites astreoides (29). LIMESTONE BOULDERS AND COBBLES -- Derived and found onshore (633). MOLLUSCAN SHELLS -- Queen conch Aliger gigas, discarded by precolonial fishers (12 onshore heaps) and by modern fishers (40 offshore heaps); individual conch shells deposited inland by precolonial sea flood (59); tiger lucine Codakia orbicularis, also strewn in precolonial time (18). SAND -- Precolonial deposit pervasive (132), patchy (195), scarce or absent (256); younger sheet of sand and shell (42); autochthonous sand weathered from Pleistocene deposits (22). HURRICANE DEPOSITS -- Wrack of plant fragments from 2010 Hurricane Earl (13). RADIOCARBON AGES on precolonial deposits (67). ROCK WALLS -- About 90 km total length among mapped 2249 segments that likely represent about half of the full network. LIMESTONE SINKS -- Closed depressions in Pleistocene limestone, in some cases extending downward into groundwater; 1508 mapped from lidar topography. These various kinds of evidence are grouped into 12 categories. Each of these 12 child items is explained with its own metadata, rendered as a shapefile, tabulated also in comma-separated value file (except for the walls), and illustrated with a summary map and a field photograph. James Luke Blair improved the release by carefully checking its metadata and content.

本数据集发布了坐落于波多黎各海沟以南的加勒比低矮岛屿阿内加达岛（Anegada）极端海浪相关的地理配准证据清单：
——珊瑚砾石与卵石——源自近海、出露于内陆。包含巨块星珊瑚（Orbicella franksii，37处样点）、波纹双脑珊瑚（Pseudodiploria strigosa，171处样点）、鹿角轴孔珊瑚（Acropora palmata，36处样点）、芥状山孔珊瑚（Porites astreoides，29处样点）。
——石灰岩砾石与卵石——源自并出露于陆上，共633处。
——软体动物壳体——女王凤凰螺（Aliger gigas）：前殖民时期（precolonial）渔民遗留的12处陆上堆积、现代渔民遗留的40处近海堆积；前殖民时期海侵带入内陆的单个螺壳共59件；虎满月蛤（Codakia orbicularis），同样在前殖民时期散布分布，共18处。
——砂质沉积物——前殖民时期沉积：广泛分布（132处）、斑块状分布（195处）、稀少或缺失（256处）；年轻的砂壳混合席状沉积（42处）；源自更新世（Pleistocene）沉积风化的原地砂质沉积物（22处）。
——飓风沉积——2010年“厄尔”飓风带来的植物碎屑堆积，共13处。
——放射性碳定年数据——前殖民时期沉积物的放射性碳定年结果，共67组。
——石墙——已测绘的2249段石墙总长度约90公里，推测仅占完整石墙网络的一半左右。
——石灰岩封闭洼地（落水洞）——更新世石灰岩中的封闭洼地，部分延伸至地下水位以下；通过激光雷达（lidar）地形测绘共识别出1508处。
上述各类证据共划分为12个类别。12个子类别均配有专属元数据，以形状文件（shapefile）格式存储，除石墙类外均以逗号分隔值文件（comma-separated value, CSV）制表汇总，并配有概述地图与野外实拍照片作为说明。詹姆斯·卢克·布莱尔（James Luke Blair）通过仔细核查元数据与内容完善了本数据集的发布。