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Gigapans

NEW! Print your gigapan now!

  1. The open pit at the top of the Homestake Gold Mine in Lead, South Dakota beautifully exposes a series of Tertiary rhyolite dikes that were the focus of the hydrothermal system that formed this rich gold deposit. The open pit is no longer active, but it is a great opportunity for geologists to get a glimpse into the up...

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