with the dam-breach hypothesis. Creation Research Society Quarterly 46: 290–307. Oard, Michael J. 2016. A Grand Origin for Grand Canyon. Chino Valley, Arizona: Creation Research Society Books. Oard, Michael J. 2021. A dam breach unlikely for the origin of Grand Canyon. Creation Research Society Quarterly 57:206-222. O’Connor, J.E. 1993. Hydrology, hydraulics, and geomorphology of the Bonneville Flood. Geological Society of America Special Paper 274, 83 pp. DOI: https://doi.org/10.1130/SPE274 O’Connor, J.E., V.R. Baker, R.B. Waitt, L.N. Smith, C.M. Cannon, D.L. George, and R.P. Denlinger. 2021. The Missoula and Bonneville floods—A review of ice-age megafloods in the Columbia River basin. Earth-Science Reviews 208:103-181. Oviatt, C.G. 2020. G.K. Gilbert and the Bonneville shoreline. Geology of the Intermountain West 7: 301-320. Oviatt C.G., and P.W. Jewell. 2016. The Bonneville shoreline: Reconsidering Gilbert’s interpretation. In C.G. Oviatt and J.E. Shroder, Jr. (editors), Lake Bonneville: A Scientific Update. Developments in Earth Surface Processes. 20:88-104. Pedley, M., M. Rogerson, and R. Middleton. 2008. Freshwater calcite precipitates from in vitro mesocosm flume experiments: A case for biomediation of tufas. Sedimentology 56:511-527. Reagan, A.B. 1924. Stratigraphy of the Hopi Buttes volcanic field, Arizona. Pan-American Geologist 41(5):355–366. Scarborough, R.B. 1989. Cenozoic Erosion and Sedimentation in Arizona. In Geologic Evolution of Arizona. Edited by J.P. Jenney, and S.J. Reynolds, 515–537. Arizona Geological Society Digest, Vol.17. Scarborough, R.B. 2001. Neogene development of Little Colorado River Valley and eastern Grand Canyon: Field evidence for an overtopping hypothesis. In R.A. Young and E.E. Spamer (editors). Colorado River: Origin and Evolution. Grand Canyon, Arizona: Grand Canyon Association Monograph 12. Scarborough, R.B., and Jon E. Spencer. 1998. Uranium levels and radon potential in selected areas north of Phoenix, in the St. Johns area, and north of Tuba City, Arizona. Arizona Geological Survey Open-File Report 98-10. Tucson, Arizona: Arizona Geological Survey. Vennin, E., and ten coauthors. 2018. The lacustrine microbial carbonate factory of the successive Lake Bonneville and Great Salt Lake, Utah, USA. Sedimentology. Doi: 10.111/sed.12499. Williams, Howel. 1936. Pliocene volcanoes of the Navajo-Hopi country. Bulletin of the Geological Society of America 47:111-172. THE AUTHORS Steven A. Austin has Ph.D. degree in sedimentary geology from Pennsylvania State University. He serves as adjunct faculty at Cedarville University and researches special projects with Logos Research Associates. He has specialized in modeling catastrophic sedimentary process with specific application to strata of Grand Canyon. His 36-year investigation of a single fossil-bearing stratum within the Redwall Limestone has allowed him to camp two years below the rim of Grand Canyon. He is author of three books and more than a hundred technical geology papers. His wife is Dr. Kelly A.Austin, professor of pediatric surgery at Children’s Hospital, University of Pittsburgh. Edmond W. Holroyd, III earned his Ph.D. degree in atmospheric science from State University of New York. He specialized in cloud physics and weather modification working 31 years for the U.S. Bureau of Reclamation. Specialization in remote sensing allowed him to publish many technical science papers. He teaches adjunct at high schools and universities, and does volunteer work. Thomas F. Folks is a retired U.S. Department of Interior, Bureau of Land Management Wilderness/Outdoor Recreation Planner who has lived, worked, and explored the lands north of Grand Canyon for over 50 years. He continues to make use of his regional knowledge and extensive experience in aerial photography interpretation, mapping, land use planning, government permitting and resource management to assist a number of scientists in planning and executing research field operations in the region. Nate Loper is the Executive Director of Canyon Ministries and has spent nearly 1,000 days teaching at the Grand Canyon and throughout the Southwest, including leading dozens of river trips on the Colorado River. His background includes leading tours through national parks and museums and speaking at conferences and events throughout the US and UK on geology and biblical archaeology. A former pastor for many years, he is currently working on a master’s degree in Ancient Civilizations and Egyptology. AUSTIN, HOLROYD, FOLKS, AND LOPER Shoreline Transgressive Terraces 2023 ICC 362
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