Digital Geologic Map of the Guinea Quadrangle, Virginia (NPS, GRD, GRE, FRSP)

The Digital Geologic Map of the Guinea Quadrangle, Virginia is comprised of GIS data layers, two ancillary GIS tables, a Windows Help File with ancillary map text,...弗吉尼亚州几内亚图幅数字地质图由地理信息系统（GIS）数据图层、两份辅助GIS数据表，以及一份附带配套地图文本的Windows帮助文件组成。