Welcome Geo Detectives!
introduction
minerals
rocks
plate tectonics
geological time periods
fossils
earth processes
teachers' guide
contact us
Geological Time Periods
Be a GeoSci
http://cuip.uchicago.edu/wit/2000/teams/geomod/geologicaltimeline1.html
entist
(grades PreK-1)
Be a GeoDetective
(grades 2-4)
Be a GeoHero
(grades 5-6)
