7 Geologic Maps, Digital Geologic Maps, Geophysical Maps, and Derivatives from Geologic Maps (Posters)

Thursday, 12 March 2009
8:30 AM - 12:30 PM

GEOLOGIC MAPPING SECTION PROJECTS AT THE KENTUCKY GEOLOGICAL SURVEY

Paper number: 7-5
Program: Theme Sessions
Time: 8:30 AM – 12:30 PM

Authors

Abstract

The Geologic Mapping Section at the Kentucky Geological Survey is currently creating digital geologic maps, derivative maps, and databases for use in GIS. Since 2004, KGS has created 1:24,000-scale Quaternary geologic maps along the Ohio and Green Rivers in western Kentucky. Paleozoic bedrock in western Kentucky is overlain by glacial outwash deposits, fluvio-lacustrine deposits along tributaries, and loess deposits in upland areas. To support this mapping project, a database is being created to determine subsurface lithologies and depth to bedrock values. From this subsurface database, a bedrock topographic map for the region will be created as a derivative product. Information from this study is also being used for seismic hazard studies in the region. Subcrop geologic maps at a scale of 1:100,000 are also being created for western Kentucky using the subsurface lithologic and depth-to-bedrock information in areas where bedrock is covered by unconsolidated sediments.

The KGS Geologic Mapping Section is also creating surficial geologic maps for eastern Kentucky. The geology in eastern Kentucky consists of Pennsylvanian clastic sedimentary rocks, and the landscape is characterized by narrow stream valleys with thin alluvial deposits and steep valley walls. This project involves mapping surficial deposits and residual soils for engineering purposes. An inventory of landslides is also being developed in conjunction with this research.

A fracture mapping project has evolved in response to Kentucky Transportation Cabinet requests for geologic input in road construction and improvements. The fracture mapping will also contribute information that relates to the possible causes of landslides.

The maps and data associated with the projects mentioned above will be available in the future via the KGS map page: kgsmap.uky.edu/website/KGSGeology/viewer.asp.