WildGeeseAdventure.com |
The Grand Canyon Backcountry Guide |
Natural History |
Home · Trips · Navigation · Weather · Gear · Water · Food · Cigars ·
Books & Maps · Transport & Shuttles · Lodging · Guide Services · Natural History · Human History · Other Canyon Links · The Info Exchange · Contact Us |
Natural HistorySorry... Still trying to get our heads around the concept of 2 Billion years old... |