These basic aggregates are found throughout the United States and Canada as noted on the map in the areas shown.
Click an aggregate below to change the map.
Soft Limestone, Sandstone, Dolomite Limestone, Siliceous, Soft Shell
Pit Gravel, Limestone, Dolomite
Medium Hard River Rock, Medium Traprock, Decomposed Granite, Medium Crushed Gravel
Granite, Slate, Traprock, Basalt, Quartzite
Hard Chert, Quartz, Flint Rock, Hard River Rock
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