Summary:
- The article explores the geological history of the Grand Canyon, specifically investigating the "Great Unconformity," a massive gap in the rock record where over a billion years of geological time are missing.
- Researchers are utilizing thermochronology—analyzing how heat affects minerals—to determine if the erosion that created this gap was caused by the breakup of the supercontinent Rodinia or by the movement of massive glaciers during "Snowball Earth" events.