
Sixteen miles from Grand Canyon's south rim, a cone-shaped butte rises like a lone sentinel 1,000 feet above the Coconino Plateau floor. Thousands of tourists rush past on Arizona Highway 64 without giving it another thought, yet this humble little hill testifies to a remarkable past.
Red Butte is composed of flat-lying shales of the Moenkopi Formation, overlain by Shinarump Conglomerate of the Chinle Formation. Continuous exposures of these two formations are not found for tens of miles around, yet they occur here. These strata sit on a foundation of flat-lying and resistant Kaibab Limestone, the rim rock for most of Grand Canyon and surface of the Coconino Plateau. A basalt (lava) flow tops the butte, protecting the softer layers below from erosion. Lava ordinarily flows downhill, so how did it get on top? Answer: it flowed onto a surface that was once 1,000 feet higher than the present Coconino Plateau! Strata of the Moenkopi, Chinle, and perhaps other formations were stripped away by erosion. Red Butte stands as the most prominent vestige of this once continuous layer.
The butte's shale slopes tell another story. These shales belong to the Moenkopi Formation, a stratum that can be traced across parts of Wyoming, Utah, Colorado, and New Mexico. Lateral equivalents of the Moenkopi may extend to Connecticut, England, Germany, Spain, and Bulgaria.1 Fossil plants, crinoids, brachiopods, gastropods, bivalves, ammonoids, nautiloids, arthropods, fish, reptiles, and labyrinthodont amphibians have been recovered from Moenkopi strata in the Grand Canyon region.2 To explain this odd assortment of terrestrial and marine taxa, and the persistence of the strata, geologists envision for western North America "a broad, continental plain that was periodically flooded by an ocean."3
A global Flood may provide the framework for a more credible depositional model. During the Flood, sediment-choked waters deposited 1,200 meters of flat-lying "Grand Canyon strata" and around 4,000 meters of Mesozoic strata (seen today atop Utah's Grand Staircase to the north, and Arizona's Black Mesa to the east). The unique vertical movements in the earth's crust during the Flood's retreat4 uplifted the region, and an enormous quantity of soft sediment was removed from its top--a volume far greater than that excavated from Grand Canyon proper.5 Red Butte is a tiny remnant from this vast erosion. When the strata gained sufficient internal strength to stand as near-vertical walls, Grand Canyon itself was incised into the plateau.
Deposition and erosion on such scales boggle the mind, yet they unquestionably took place. This humble little butte challenges geologists to think big. Perhaps this is why the Grand Canyon region fits so well with a global Flood model of earth history.6
References
* Mr. Hoesch is Research Assistant in Geology.
Cite this article: Hoesch, W. 2008. Red Butte: Remnant of the Flood. Acts & Facts. 37 (3): 14.
This article was originally published March, 2008. "Red Butte: Remnant of the Flood", Institute for Creation Research, http://www.icr.org/article/3755/ (accessed December 01, 2008).