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Ice Age Earth Field Trip...10/16
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Thornton Quarry...here you're looking at rock 450 million years old. The rock here is made of coral reefs from when Chicago was
Thornton Quarry...here you're looking at rock 450 million years old. The rock here is made of coral reefs from when Chicago was
Date: 10/16/2004
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Ice Age Earth Field Trip...10/16
1. Thornton...
2. Cool...
3. Waterfall...
4. Woods...
5. Ice Age...
6. People...
7. Waterfall...
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20. Doc...