NJ, the OP for this thread states:
I'd like for us to discuss the Grand Canyon, beginning with the lowest, oldest layers and then working up to the top, layer by layer. I'd like to see explanations for each layer, it's composition, the environment when it was created, and get questions about that layer answered before we move up to the next layer.
If you want to discuss a non-mainstream hypothesis please start a new thread.
AdminAsgara Queen of the Universe
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