DS926 Digital surfaces and thicknesses of selected hydrogeologic units of the Floridan aquifer system in Florida and parts of Georgia, Alabama, and South Carolina -- Geologic units forming the top of the Floridan aquifer system

These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. Digital surfaces and thicknesses of selected hydrogeologic units of the Floridan aquifer system were developed to define an updated hydrogeologic framework as part of the U.S. Geological Survey Groundwater Resources Program. This feature class contains polygons of geologic units forming the top of the Floridan aquifer system. Polygon regions were modified from U.S. Geological Survey Professional Paper 1403B (Miller, 1986).

本数据集发布于2016年10月1日美国地质调查局（U.S. Geological Survey, USGS）科学数据审核、批准与发布政策生效日期之前，该政策的具体要求详见USGS《调查手册》第502.8章《基础科学实践：科学数据发布的审核与批准》。本次生成的佛罗里达含水层系统（Floridan aquifer system）部分选定水文地质单元的数字地表与厚度数据，属于美国地质调查局地下水资源项目的一部分，旨在构建更新后的水文地质框架。该要素类（feature class）包含构成佛罗里达含水层系统顶部的地质单元多边形要素。本数据集所用的多边形区域改编自美国地质调查局专业报告1403B（Miller, 1986）。