Geology
Geology Online Learning Centers
Lessons, Courses, Units, and Texts
Geology: http://learninglynx.blogspot.com/2009/12/geology-lessons-from-usgs.html
Soil Science
Soil Science: http://learninglynx.blogspot.com/2009/12/free-soil-science-curriculum.html
Soil Science from AMSER: http://learninglynx.blogspot.com/2010/02/soil-science-and-environmental-ed-from.html
Soil Science Interactives: http://learninglynx.blogspot.com/2010/03/who-knew-dirt-could-be-so-interesting.html
Rocks
Fossils and our evolving planet: http://learninglynx.blogspot.com/2010/01/evolving-planet.html
Jade: http://learninglynx.blogspot.com/2010/02/jade.html
Diamonds: http://learninglynx.blogspot.com/2010/02/diamonds.html