RT @AZGeology: Coal Mine Mesa, situated ~12 miles southeast of Tuba City in northeast Arizona, owes its name to #coal seams in the #Cretace…
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Coal Mine Mesa, situated ~12 miles southeast of Tuba City in northeast Arizona, owes its name to #coal seams in the #Cretaceous #Mancos Shale and the underlying Dakota Sandstone. Billingsley G.B., Stoffer, P.W. and Priest, S.S., 2012, https://t.co/B4bdGt58
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RT @AZGeology: Hunting for Sinkholes on the Walhalla Plateau, N Arizona. Billingsley et. al. (2012) Geologic Map of the Tuba City 30’x60’ Q…
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RT @AZGeology: Hunting for Sinkholes on the Walhalla Plateau, N Arizona. Billingsley et. al. (2012) Geologic Map of the Tuba City 30’x60’ Q…