2010 GSA Annual Meeting Field Trip #413

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I-70 Road Cut — The geologically famous I-70 road cut through the Dakota Hogback west of Denver beautifully exposes (from left to right) ever older, east-dipping South Platte, Lytle, Morrison and Ralston Creek strata in this shot of the south side. The same Mesozoic strata arch discontinuously across the Rockies to the opposing west-dipping Grand Hogback at Newcastle, 155 miles to the west. Photo © Jeremy McCreary.
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