| Geology of Lory State Park | |
| Lory State Park Information | From State of Colorado Parks |
| Colorado Geology Summary | |
| Teacher Activities on Relative & Absolute Dating:How Geologists Tell Time |
University of Vermont |
| Teaching about Geologic Time |
- Journal of Geological Education (National Association of Geology Teachers)
- The Earth Scientist (National Earth Science Teachers Association)
- The Space Educator (National Space Society)
| US Geological Survey | Activities for k-6 and 7-12 |
| Colorado Geological Survey | Articles and tools to help understand Colo. geology |
herbsearth 
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