It looked challenging to begin with, but it turned out to take me less than five minutes. It feels so good to put geologic understanding of the landscape to work (plus a good familiarity with Google’s satellite coverage). Here’s my answer.
yep, you got it again….that is the northeastern part of the San Rafael swell, a Laramide structure in central Utah that exposes Triassic strata in its core (if i remember) up to Cretaceous stuff on its edges. Interstate 70 goes right through it, and the San Rafael river, which you can see in that image, cuts a beautiful canyon creating a Canyonlands-like landscape.
i thought this one might take more than a day…i’ll have to step it up a notch next time
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