1. Surficial geologic map of the Monson quadrangle, Massachusetts and Connecticut [cartographic material] Yale Public content 1977. 2012-06-06T14:13:41Z. 2012-06-13T15:04:48Z. Peper, John D. U.S. Geological Survey. English. Public. Massachusetts, Hampden County, Connecticut, Tolland County, and Monson Region.