Thornton Quarry...here you're looking at rock 450 million years old. The rock here is made of coral reefs from when Chicago was

Cool erosion in the quarry.

Waterfall at one of our sites

Woods outside of Chicago.

Ice Age Earth class

People attempting to cross the stream without getting soaked.

Waterfall on the other side

Stratiated bedrock grinded by glaciers.

Glacial Till dumped in Chicago 15,000 years ago