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.

本数据集发布了加勒比海波多黎各海沟以南低矮岛屿阿内加达岛（Anegada）上与极端海浪相关的地理配准证据清单：
珊瑚砾块与砾石——源自近海、被搬运至内陆。涉及的珊瑚类群包括：团块星珊瑚（Boulder star coral，Orbicella franksii）37个采样点、脑珊瑚（brain coral，Pseudodiploria strigosa）171个采样点、鹿角珊瑚（elkhorn coral，Acropora palmata）36个采样点、芥末丘珊瑚（mustard hill coral，Porites astreoides）29个采样点。
石灰岩砾块与砾石——源自近海并被搬运至陆上，共计633处。
软体动物贝壳——女王凤凰螺（Queen conch，Aliger gigas）：前殖民时期渔民丢弃的贝堆共12处（陆上），现代渔民丢弃的贝堆共40处（近海）；前殖民时期海侵搬运至内陆的单枚女王凤凰螺贝壳共59枚；虎满月蛤（tiger lucine，Codakia orbicularis）在史前时期被广泛散布，共计18处。
砂质沉积——前殖民时期砂质沉积分布广泛（132处）、斑块状分布（195处）、稀少或缺失（256处）；较年轻的砂与贝壳混合层共42处；源自更新世沉积物风化形成的原地砂质沉积共22处。
飓风沉积——2010年厄尔飓风（Hurricane Earl）产生的植物碎屑堆积物，共计13处。
放射性碳定年数据——针对前殖民时期沉积物的定年结果，共计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。
石灰岩洼地——更新世石灰岩中的封闭洼地，部分可延伸至地下水位以下；通过激光雷达（lidar）地形数据共测绘出1508处。
上述各类证据共划分为12个类别。每个子类均配有专属元数据，以形状文件（shapefile）格式存储，除石墙类外均以逗号分隔值（CSV）文件制表，并配有汇总地图与野外照片进行说明。