April 15 at 7pm
Navajo Sandstone – A Flood Deposit ?
By Geochemist, Raymond Strom
For more than a decade a research team has studied the famed Coconino Sandstone which is commonly presented as a the result of wind blown desert sand dunes. Since the Coconino is so large that it covers part of fourteen states in the Western USA, a desert that large would preclude the idea that most of that geology was generated by a worldwide flood like that in the Bible. The Coconino produced many lines of evidence that indicate the deposition of all that sand was under water. One can read a summary of the details in the current GHCA newsletter for 4/15.
There are several other large crossbedded sandstones in the Western USA so these need to be studied as well. So, the research team has begun work on the Navajo sandstone next. The Navajo sandstone will be familiar to many because it makes up a large part of the canyon walls at Zion National Park which is awe inspiring indeed. The Navajo is important for the same reasons as the Coconino but the two are different is some interesting ways also. The only way to answer the flood question is to diligently do the field work, the laboratory analysis, modeling and publication. Raymond Strom will introduce us to the nature of the Navajo and the problems and opportunities it offers the research team.
Eventually we will gain a more thorough understanding of these crossbedded sandstones and how they were deposited. Even more is the question of where did all of the sand and other minerals come from, and how did it get from that place to its present location and form?
Join us each month to continue our adventure of discovery by carefully following the data.
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