The Grand Canyon is a layer cake that tells the geological story of the last two billion years. The canyon gives visitors a rare opportunity to see the distinct layers that form the Earth.
The Grand Canyon is a layer cake that tells the geological story of the last two billion years. The canyon gives visitors a rare opportunity to see the distinct layers that form the Earth. Brad Branan bbranan@sacbee.com
The Grand Canyon is a layer cake that tells the geological story of the last two billion years. The canyon gives visitors a rare opportunity to see the distinct layers that form the Earth. Brad Branan bbranan@sacbee.com