lake mead area near boulder hoover dam |
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| navigate by keyword : arizona black boulder dam exposed fortification hill hoover islands lake land mead mountains nevada receding southwest volcanic water |
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| The image shows a part of Lake Mead near Boulder Dam (Hoover) Dam. The land in the foreground, as well as the islands were at one time under water but because of the drought in he southwest and receding water levels they are now exposed, The large, black hill in the upper, right center is called Fortification Hill and was formed from volcanic activity about 13 million years ago. The foreground land in in Nevada and the background mountains are in Arizona. |
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