24K Dominant Lithology

This layer contains polygons representing the 1:24,000-scale geologic formations. Digitized from the 1:24,000 Geologic Map Series maps (original maps published by Kentucky Geological Survey - U.S. Geological Survey from 1960 to 1980). Polygons in this layers are styled by dominant lithology as determined from the descriptions by the original mapper for each quadrangle.本图层包含用于表示1:24000比例尺地质地层的多边形要素。本图层的数据源自1:24000比例尺地质图系列地图的数字化成果，原始地图由肯塔基地质调查局与美国地质调查局于1960年至1980年间发布。本图层内的多边形要素依据原始制图者针对各图幅的描述所确定的主导岩性进行符号化配置。