1. Reconnaissance bedrock geologic map of the Randolph Center quadrangle, Vermont [microform] Yale Public content 1991. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Hatch, Norman L. U.S. Geological Survey ; Books and Open-File Reports Section, distribution. English. Public. Vermont, Orange County, and Windsor County.