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Located in Hot Springs, South Dakota, the Mammoth Site is the site of 27000 year old sinkhole and hot springs. Mammoths (mostly Columbian, but a couple of Woolly Mammoths too) occasionally wandered into the sinkhole and became stuck in the mud and unable to escape. As a consequence many mammoth skeletons were preserv...
Carved from the Precambrian Harney Peak Granite by Gutzon Borglum and a host of stonemasons, the Mount Rushmore memorial portrays the likenesses of Presidents George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln.
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 The open pit is no longer active, but it is a great opportunity for geologists to get a glimpse into the up...
A view of the erosional features of the White River Badlands in eastern Badlands National Park, near Interior, South Dakota. There's a remarkably high contrast between the shadows and the sunlight, but I did my best with the exposure.