Alton Quadrangle
Surficial Geology
Title: Surficial Geology of Alton Quadrangle, Madison County, Illinois
Author: David A. Grimley
Description: 32" × 88" map sheet; includes legend, descriptive text, inset maps (2), photographs (3) and cross sections (2)
Year: 1999; originally STATEMAP 1997
Series ID: IGQ Alton-SG
File size: 23.3 mb
Paper: $10.50
GIS data: 15 mb zip file (contains ArcGIS geodatabase and metadata, ArcReader map document, and published map in PDF format)
Bedrock Geology
Map image not yet available.
Authors: F. Brett Denny and Joseph A. Devera
Description: Please contact authors for information.
Year: 1997 STATEMAP
Series ID:
File size:
Paper:
Ordering information for Illinois State Geological Survey publications
Updated 07/11/2012 SLD