This map showing the regional characteristics of the Amburgy coal bed was prepared as part of the U.S. Geological Survey's National Coal Assessment program, which compiles regional maps and databases that provide a comprehensive assessment of the most important coal beds in the nation. The Amburgy coal zone is composed of a number of distinct coal beds that merge in some areas to form mineable coal bodies. For the purpose of this assessment, the zone has been divided into two beds; the Lower Amburgy (A) and Upper Ambury (B). The lower bed is of greatest economic significance and is the subject of this publication. The map shows the total coal thickness, minus partings, of the lower or main Amburgy bed for the eastern Kentucky region. It is not a traditional isopach map, because the mineable bed is not composed of the same benches in all areas (Figs. 1-3). Discontinuities, delineated by facies boundaries on the map, indicate abrupt changes in thickness caused by splitting. Discontinuities were classified on the basis of the nature, as well as the confidence in location, of the discontinuity (Fig. 1). The Lower Amburgy bed is the main bed north of the Pine Mountain Overthrust Fault, where it is also known as the Williamson, Gun Creek, and Cannel City coal. South of the Pine Mountain Overthrust Fault, the lower bed has complex bench architecture, and is known locally as the Creech coal.
Map and Chart 62
Digital Object Identifier (DOI)
This work was supported by grants from the U.S. Geological Survey's Coal Availability and National Coal Assessment programs.
Shultz, Michael G.; Esterle, Jeffery A.; and Thacker, Ernest E., "Total Thickness of the Amburgy Coal in Eastern Kentucky" (2003). Map and Chart--KGS. 61.