The Kentucky Geological Survey (KGS), as part of the United States Geoscience Information Network (USGIN), provides a compilation of geologic maps from the NGCMP-09 database (http://ngcmp.usgs.gov/) covering the United States of America including Hawaii and Alaska. This Service was published by the KGS as part of the USGIN initiative to “create and facilitate discovery and access to geoscience information provided by state and federal geological surveys of the United States”. These data were compiled by the Kentucky Geological Survey. Four (4) layers included in this service are as follows: 1. US-KY_KGS_24K_Geologic_Age is a compilation dataset containing geologic units covering the Commonwealth of Kentucky at 1:24,000 scale. The data table includes geologic name, description, lithology, and geologic history. The data in this layer is portrayed based on geologic age; 2. US-KY_KGS_24K_Lithology is a compilation dataset containing geologic units covering the Commonwealth of Kentucky at 1:24,000 scale. The table includes geologic name, description, lithology, and geologic history. The data in this layer is portrayed based on lithology; 3. US-KY_KGS_24K_Contacts is a compilation dataset containing geologic contacts covering the Commonwealth of Kentucky at a scale of 1:24,000. The table includes contact type, positional accuracy and generic symbolizer (FGDC). Citations are included in the data set. 4. US-KY_KGS_24K_Faults is a compilation dataset containing shear displacement structures covering the Commonwealth of Kentucky at a scale of 1:24,000. The table includes fault type, positional accuracy, and generic symbolizer (FGDC). Citations are included in the dataset.