Eco Explorers
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Students learning about the Ponderosa pine forest during an Eco Explorers program at Grand Canyon National Park. For a detailed Eco Explorers lesson plan, click here. The lesson plan includes the Arizona State Teaching Standards addressed by the program. |
Did You Know?
The more recent Kaibab limestone caprock, on the rims of the Grand Canyon, formed 270 million years ago. In contrast, the oldest rocks within the Inner Gorge at the bottom of Grand Canyon date to 1.84 billion years ago. Geologists currently set the age of Earth at 4.5 billion years.