README.TXT PATTERN PALLETES As an easy way to assign patterns to geologic map units, several palettes have been designed that contain the patterns shown on the Pattern Chart (plate B). The patterns shown on this chart have been used for many years on geologic maps published by the U.S. Geological Survey. The pattern palettes were created in Adobe Illustrator 8.0.1 on a Macintosh and saved in Illustrator EPS format. To download the pattern palletes, return to the main page and then click on the appropriate links.