The Geologic Time Spiral

"The Geologic Time Spiral: A Path to the Past" by Joseph Graham, William Newman, and John Stacy. Available from the U.S. Geological Survey Website, https://pubs.usgs.gov/gip/2008/58/
Abstract/Description: "The Geologic Time Spiral: A Path to the Past" by Joseph Graham, William Newman, and John Stacy. Available from the U.S. Geological Survey Website, https://pubs.usgs.gov/gip/2008/58/
Subject(s): environmental sciences