Skehan, J. W. Roadside Geology of Massachusetts. (Mountain Press, 2001).

Geologic Fieldtrip Guidebook database for North America. at <http://guide.georef.org/dbtw-wpd/guidens.htm>

Zen, E. -an et al. Bedrock Geologic Map of Massachusetts. USGS Unnumbered Series (1983). at <http://ngmdb.usgs.gov/Prodesc/proddesc_16357.htm>

Robinson, P. & Fernandez, M. Preliminary bedrock geologic map of the Orange 7.5' quadrangle, Massachusetts (including portions of the Millers Falls and Athol 7.5' quadrangles). Open File Report (2008).

Barosh, P. J., Fahey, R. J. & Pease, Maurice Henry, J. Preliminary compilation of the bedrock geology of the land area of the Boston 2 degree sheet, Massachusetts, Connecticut, Rhode Island and New Hampshire. USGS Open File Report (1977). at <http://pubs.er.usgs.gov/publication/ofr77285>

The American Geological Institute - News and Resources for geoscientists and teachers. at <http://www.agiweb.org/index.html>

Geology Tours of National Parks. at <http://www2.nature.nps.gov/geology/tour/index.htm>

List of geology and science blogs on About.com. at <http://geology.about.com/od/blogs/Geology_Weblogs.htm>

National Park Service Teacher Resources. at <http://www2.nature.nps.gov/geology/education/index.cfm>

News and Current events in Earth Science on Geology.com. at <http://geology.com/news/>

Tapestry of Time and Terrain. at <http://tapestry.usgs.gov/Default.html>

The U-Mass Geosciences publication series. at <http://www.geo.umass.edu/dept_info/contrib_series/list.html>