Mining quartzite bedrock Mining river gravel Concrete


aggregate, mining, Baraboo, photo
Mining quartzite bedrock for aggregate. Near Baraboo, Wisconsin. The nested cones of recently sorted
material makes a good example of the Angle of Repose.


aerial, photo, gravel, mine
Gravel mining operation on edge of Chippewa River, Wisconsin.


photo, concrete, aggregate
Concrete: a combination of aggregate and cement! Image is about 20 cm across.


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