BGS Seabed Geology 10k: Anglesey version 1.0

The BGS Seabed Geology 10k: Anglesey digital map portrays the distribution of the different types of bedrock and sediments that are interpreted to represent the dominant geology within to the top 1-2 metres of the seabed to the north-west of Anglesey, at a scale of 1:10 000. It also includes the distribution of the main seabed morphological and geomorphological features (e.g. drumlins, sandwaves) and the principal structural features observed at rockhead (fractures).
This digital map is the result of the interpretation of two high-resolution, multibeam echo-sounder (MBES) bathymetry datasets: (i) the Off Skerries HI1420 survey, collected by Net Survey in 2013 as part of the Civil Hydrography Programme (CHP) surveys managed by the Maritime and Coastguard Agency (MCA) for the UK Hydrographic Office; and (ii) the North St George’s Channel candidate Marine Conservation Zone (rMCZ) survey, collected jointly by JNCC and Cefas in 2012 for the Department for Environment, Food and Rural Affairs (Defra). MBES backscatter, physical samples (e.g. grabs, cores, and boreholes), academic papers and previous BGS geological interpretations at broader scales (250k and 50k scales) were used to further inform this geological interpretation.
The bedrock is divided into three units: (i) Neoproterozoic to Palaeozoic age metamudstones and metasandstones of the Monian Supergroup; (ii) undifferentiated Lower Palaeozoic age rocks (mudstone, volcaniclastics, siltstone, slate); and (iii) limestone and sandstone of the Carboniferous Limestone Supergroup. The superficial deposits are composed of various types of glacial sediments (e.g. glacial till and morainic deposits) that were deposited underneath and around the margins of the last British-Irish Ice Sheet in the area, and also more recently deposited marine sediments.

BGS海底地质10k：安格尔西岛数字地图描绘了安格尔西岛西北部海底表层1-2米内被解释为主要地质的不同类型基岩和沉积物的分布，比例尺为1:10000。该地图还包含主要海底形态和地貌特征（如鼓丘（drumlins）、沙波（sandwaves））以及在岩面观察到的主要构造特征（断裂（fractures））的分布。
该数字地图是对两个高分辨率多波束回声测深仪（MBES）测深数据集进行解释的结果：（i）Off Skerries HI1420调查，由Net Survey于2013年收集，作为海事和海岸警卫局（MCA）为英国水文局管理的民用水文计划（CHP）调查的一部分；（ii）北圣乔治海峡候选海洋保护区（rMCZ）调查，由JNCC和Cefas于2012年联合收集，用于环境、食品和农村事务部（Defra）。MBES反向散射数据、物理样本（如抓斗样本、岩芯和钻孔）、学术论文以及之前BGS在更大比例尺（250k和50k）下的地质解释被用于进一步辅助该地质解释。
基岩分为三个单元：（i）新元古代至古生代的变质泥岩和变质砂岩（属于莫尼安超群）；（ii）未分化的下古生代岩石（泥岩、火山碎屑岩、粉砂岩、板岩）；（iii）石炭纪石灰岩超群的石灰岩和砂岩。表层沉积由多种类型的冰川沉积物（如冰碛物（glacial till）和冰碛沉积（morainic deposits））组成，这些沉积物沉积在该地区最后一次不列颠-爱尔兰冰盖（British-Irish Ice Sheet）的下方及其边缘，此外还包括较新沉积的海洋沉积物。