Tetons and Snake River, Autumn, Wyoming

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The 9 million year old the Teton range is one of the youngest mountain ranges in North America but rocks on its eastern face are among the oldest, having formed 2.5 billion years ago. The mountains soar above the Snake River as it winds through the rocky flats to their east. In this photograph the sun shines through gaps between clouds illuminating water and other particulate matter in the air showing the shafts of light, or sunbeams, against darker areas of the background.