|2010 GSA Denver Annual Meeting (31 October –3 November 2010)|
|Paper No. 60-7|
|Presentation Time: 3:05 PM-3:20 PM|
APPLICATION OF LIDAR DATA TO MAPPING GLACIAL LANDFORM/SEDIMENT ASSOCIATIONS, CHAMPAIGN COUNTY, ILLINOIS
SHILTS, William W., Prairie Research Institute, 615 E. Peabody Drive, MC-650, Champaign, IL 61820, email@example.com, BERG, Richard C., Illinois State Geological Survey, 215 Natural Resources Building, 615 E. Peabody Drive, Champaign, IL 61820, LUMAN, Donald E., Office of the Director, Illinois State Geol Survey, 615 E. Peabody Drive, Champaign, IL 61820, and MCKAY, E. Donald III, Illinois State Geological Survey, 615 E. Peabody Drive, Champaign, IL 61820|
The recently-compiled LiDAR image of Champaign County, Illinois provides new understanding of landform/sediment relationships in this low-relief, glaciated terrain. Conventional 7.5’ topographic maps with a 1.5m contour interval provide evidence of the major landforms, but more subtle and important geomorphic features stand out on the LiDAR image. A quick glance at the prominent end moraines on the image confirms that north-northeastward-trending moraines of a lobate, late Wisconsin Episode (~20,000 cal yr BP) ice front were partially overridden by two distinctive southwestward advances and retreats, all from the Lake Michigan Lobe. The subtle textures of the terrain on the ground moraine deposited during each of these events are distinctly different, but the processes that created these textures, whether glacial or periglacial, are not obvious at this writing. Some of the geomorphic features that are particularly well-displayed or recognized for the first time are:
Most of these features were not previously known or described, despite the intense study of glacial features in the county over the past century. LiDAR adds an order of magnitude more detail to the surface textures on this low-relief glacial landscape and will prove to be a valuable tool in mapping surficial geology and understanding glacial and periglacial processes in similar landscapes.
2010 GSA Denver Annual Meeting (31 October –3 November 2010)
General Information for this Meeting
|Session No. 60|
Seeing the True Shape of Earth’s Surface: Applications of Airborne and Terrestrial LiDAR in the Geosciences
Colorado Convention Center: Room 205
1:30 PM-5:30 PM, Sunday, 31 October 2010
Geological Society of America Abstracts with Programs, Vol. 42, No. 5, p. 154
© Copyright 2010 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.