About 15 feet of soil removed from the top of Silurian bedrock near Green Bay WI. About 15 feet of soil removed from the top of Silurian bedrock near Green Bay WI. By superadministrator|2019-03-19T18:21:26-05:00March 19th, 2019| Share This Story, Choose Your Platform! FacebookTwitterLinkedInRedditTumblrPinterestVkEmail About the Author: superadministrator