Bedrock summary lithologies across the UK Continental Shelf (2014 Version)

The Bedrock summary lithologies dataset is digital geological map across the bulk of the UK Continental Shelf (UKCS), for areas up to a water depth of 200m, which groups the bedrock lithologies (rock types) into classes based on similar engineering geology characteristics. The map is derived from the 1:250,000 scale digital bedrock map of the UKCS, called DiGRock250k, which is available separately from the BGS. The map was produced in 2014 in collaboration with, and co-funded by, The Crown Estate as part of a wider commissioned project to assess seabed geological constraints on engineering infrastructure across the UKCS. The divisions on the map combine the bedrock formations into 8 classes (with several subdivisions) of similar strength and lithological variability, each with a ‘Category’ title that summarises their main lithological character: Class1 – Igneous; Class 2 - Tertiary Sandstone and Limestone; Class 2.5 - Tertiary Sandstone and Limestone Interbedded; Class 3 - Tertiary Mudstone; Class 4 - Mesozoic Sandstone and Limestone; Class 4.5 - Mesozoic Sandstone and Limestone Interbedded; Class 5 - Mesozoic Mudstone; Class 6 – Chalk; Class 7 – Metamorphic; Class 8 - Palaeozoic Sedimentary. The data are held by the BGS as an ESRI ArcGIS Shapefile.

《英国大陆架基岩岩性概要数据集》系一项数字化地质图，覆盖英国大陆架（UKCS）大部分区域，水深至200米，该数据集依据相似工程地质特性将基岩岩性（岩石类型）划分为不同类别。该图基于1:250,000比例尺的英国大陆架数字化基岩图——DiGRock250k编制而成，该图可单独从英国地质调查局（BGS）获取。该图于2014年制作，并由王室地产公司合作资助，作为一项更大规模委托项目的一部分，旨在评估英国大陆架海底地质对工程基础设施的限制。图中的分类将基岩构造合并为8个类别（包含多个子类别），每个类别具有相似强度和岩性变化，并配有“类别”标题，概括其主要岩性特征：类别1 - 岩浆岩；类别2 - 第三纪砂岩和石灰岩；类别2.5 - 第三纪砂岩和石灰岩互层；类别3 - 第三纪泥岩；类别4 - 中生代砂岩和石灰岩；类别4.5 - 中生代砂岩和石灰岩互层；类别5 - 中生代泥岩；类别6 - 白垩岩；类别7 - 变质岩；类别8 - 古生代沉积岩。数据由英国地质调查局以ESRI ArcGIS Shapefile格式保存。