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Table of Contents - Special Paper 489

Grand Canyon Geology: Two Billion Years of Earth’s History

Edited by J. Michael Timmons and Karl E. Karlstrom

Acknowledgments		v
Introduction to Grand Canyon geology Karl E. Karlstrom, J. Michael Timmons, and Laura J. Crossey		1
1.	Vishnu basement rocks of the upper Granite Gorge: Continent formation 1.84 to 1.66 billion years ago Karl E. Karlstrom, Bradley R. Ilg, David Hawkins, Michael L. Williams, Gregory Dumond, Kevin Mahan, and Samuel A. Bowring	7
2.	The Grand Canyon Unkar Group: Mesoproterozoic basin formation in the continental interior during supercontinent assembly J. Michael Timmons, John Bloch, Kathryn Fletcher, Karl E. Karlstrom, Matt Heizler, and Laura J. Crossey	25
3.	The Neoproterozoic Earth system revealed from the Chuar Group of Grand Canyon Carol M. Dehler, Susannah M. Porter, and J. Michael Timmons	49
4.	Many unconformities make one ‘Great Unconformity’ Karl E. Karlstrom and J. Michael Timmons	73
5.	Geologic history and paleogeography of Paleozoic and Early Mesozoic sedimentary rocks, eastern Grand Canyon, Arizona Ronald C. Blakey and Larry T. Middleton	81
6.	Faulting and uplift in the Grand Canyon region Karl E. Karlstrom and J. Michael Timmons	93
7.	The Laramide and post-Laramide uplift and erosional history of the eastern Grand Canyon: Evidence from apatite fission-track thermochronology Shari A. Kelley and Karl E. Karlstrom	109
8.	A review of the Quaternary geomorphology of eastern Grand Canyon Joel L. Pederson	119
9.	Travertines and travertine springs in eastern Grand Canyon: What they tell us about groundwater, paleoclimate, and incision of Grand Canyon Laura J. Crossey and Karl E. Karlstrom	131
Afterword Karl E. Karlstrom, Laura J. Crossey, and J. Michael Timmons		145
References Cited		149