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Sheepridge Site
Sheepridge was a medium-large surface mine pit In Johnstown, PA area. It was mapped in Sept 2013. As with all surface mines, it is a man-made structure with short-lived... -
Fieg Site
The Fieg site was a surface coal mine in Somerset County, PA. These artificially shaped pits were used for early robot testing and mapped several times in late 2012 through... -
Indian Tunnel - COTM
Indian Tunnel is the largest of the lava tubes in the caves area of Craters of the Moon park. It was formed by the Blue Dragon Flow 2100 years ago. The tunnel is over 10m in... -
King's Bowl - COTM
This dataset from Craters of the Moon National Monument and Preserve covers the King's Bowl pit and immediate vicinity. King's Bowl is a phreatic explosion pit caused by...