Mapping is another critical part of the Massachusetts Geological Survey. Before he ended his 22-year term as state geologist, Mabee published a updated bedrock map of the state.

Geological Map of Monte Somma and Vesuvius. Constructed by H. J. Johnston-Lavis., &c., during the Years 1880–88. Scale, 1:10,000 (6˙33 inches = 1 mile).

Back in the early 1700s, Massachusetts saw two fairly severe earthquakes. The first, in 1727, is believed to have been roughly a magnitude 5.6 and centered around Newburyport and Amesbury.

The map combines the best images obtained during flybys conducted by NASA’s Voyager 1 and 2 spacecraft (1979) and Galileo orbiter (1995 to 2003) and is now published by the U. S. Geological ...

A map of Chicago, Illinois, imprinted in 1913 from the United States Geographical Survey’s historical topographic map collection. Image courtesy of the USGS Map lovers, rejoice! The United ...