Maps, Data, Publications, and Resources
Geologic Fieldtrip Guidebook database for North America. at <http://guide.georef.org/dbtw-wpd/guidens.htm>
Water Science for Schools (USGS). at <http://ga.water.usgs.gov/edu/>
Voted one of the 10 Best Websites by Government Computer News!
Roadside Geology of Massachusetts. (Mountain Press, 2001).