Borehole data for pre-Middle Jurassic basement rocks beneath the Atlantic and Gulf Coastal Plains, Florida and Alabama

Data from 316 boreholes (including coreholes) that penetrated buried pre-Middle Jurassic basement rocks that lie beneath Atlantic and Gulf Coastal Plain sedimentary deposits in Florida and Alabama were compiled from non-proprietary, mostly published sources in order to support subsurface geologic mapping, geologic interpretation of geophysical data (aeromagnetic, gravity, seismic), topical studies as in geochronology, and applications ranging from mineral, energy, and water resources to earthquake hazards. Boreholes into bedrock beneath the coastal plain near the Fall Line in Alabama reveal buried extensions of geologic units exposed in the Piedmont, and those near the Gulf coast and beneath Florida provide rare insights into deeply buried rock units that have no surface exposures. Data for each borehole include the State, a unique identifier (well_ID), borehole name or location, year drilled, land surface elevation in feet, top-of-basement depth in feet, total depth of borehole in feet, top-of-basement elevation in feet, basement penetrated by drilling in feet, depth reference (ground level, Kelly bushing, or derrick floor), lithology code, basement type, quality of lithologic data, description of pre-Cretaceous basement rock, sample (drill core or cuttings), latitude and longitude (NAD27), county or city, and reference citations. The data in comma separated values (.csv) format are accompanied by an explanation (.txt), references (.txt), and metadata (.xml). The data file uses standard abbreviations for mineral names where necessary to save space.

本数据集整合了来自佛罗里达州与阿拉巴马州境内大西洋及墨西哥湾沿岸平原（Atlantic and Gulf Coastal Plain）沉积地层（sedimentary deposits）下方、穿透埋藏型中侏罗世前（pre-Middle Jurassic）基底岩（basement rocks）的316个钻孔（borehole，其中包括取心钻孔（corehole））的数据，所有数据均来自非专有（non-proprietary）且多为已发表的文献源，旨在支撑地下地质填图（subsurface geologic mapping）、地球物理数据（geophysical data，含航空磁测（aeromagnetic）、重力（gravity）、地震（seismic））的地质解译、地质年代学（geochronology）等专题研究，以及矿产、能源、水资源乃至地震灾害（earthquake hazards）防控等多类应用。
阿拉巴马州瀑布线（Fall Line）附近沿岸平原下方基岩（bedrock）钻孔揭示了皮德蒙特高原（Piedmont）出露地质单元的埋藏延伸体；而墨西哥湾沿岸及佛罗里达州下方的钻孔，则为研究无地表出露（no surface exposures）的深部埋藏岩组提供了珍贵的研究视角。
每个钻孔的数据集包含以下信息：所属州、唯一标识符（unique identifier，well_ID）、钻孔名称或位置、钻井年份、地表高程（land surface elevation，单位：英尺）、基底顶面埋深（top-of-basement depth，单位：英尺）、钻孔总深度（total depth of borehole，单位：英尺）、基底顶面高程（top-of-basement elevation，单位：英尺）、钻井穿透的基底厚度（basement penetrated by drilling，单位：英尺）、深度基准面（depth reference，含地面、凯莉补心器（Kelly bushing）或钻台（derrick floor））、岩性编码（lithology code）、基底类型（basement type）、岩性数据质量（quality of lithologic data）、白垩纪前（pre-Cretaceous）基底岩描述、样品类型（sample，含岩心（drill core）或岩屑（cuttings））、经纬度（采用北美大地基准27（NAD27））、所属县/市，以及参考文献（reference citations）。
本数据集以逗号分隔值（comma separated values, .csv）格式存储，附带说明文档（.txt）、参考文献文档（.txt）与元数据（metadata）文档（.xml）。
为节省篇幅，数据文件在必要时使用矿物名称标准缩写。