101 American Geo-Sites You've Gotta See geology map Geochemical samples were grouped into

Geochemical samples were grouped into nine units based on the calculated water type

and Cambrian age formations in San Juan County

Colorado’s multihued rocks—from white and red sandstones to green shales and pink granites—are vividly splashed across the pages in stunning color photographs

supernovas

This geologic map and report explain the diverse geology of this region

101 American Geo-Sites You've Gotta See geology map Geochemical samples were grouped intoBy Albert B. Dickas Rocks racing across a lakebed in Death Valley. Perfectly preserved 36 million year old tsetse flies in Colorado. Dinosaur trackways cemented into ancient floodplains in Connecticut. A gaping rift in the Idaho desert. What do these enigmatic geologic phenomena have in common? Besides initiating a profusion of head scratching over the years, these sites of geologic wonder appear side by side, for the first time, in a single