MJC, who blogs at Geotripper, has been posting in recent weeks from Cretaceous locales on the Colorado Plateau. His new one from the Black Mesa area on the Navajo Reservation covers geology and a pointed view on the coal development history.
[right, Black Mesa, near Kayenta Arizona, ca. 1978. Photo NAU.PH.95.55.91 by Don Lyngholm courtesy of Cline Library Special Collections, Northern Arizona University]