9). McKee identified the depositional environment of the Coconino as eolian (1934), the Tapeats as shallow marine (1945), and the Wescogame as fluvial (1982). The analysis showed that there is no statistically significant difference between the sets of data (p=0.75), despite the three formations having different cross-bed set thicknesses (Fig. 8) and different supposed depositional environments. IV. DISCUSSION A. Limitations of the data set The data set is certainly not perfect. Although many of my dune data points come from weighted means, much of that data was not used in the comparisons because it was not collected in the same Fig. 8. A comparison of sandstone cross-bed inclinations arranged by set thickness. Small (thinner) cross-bed sets are at the bottom and larger (thicker) cross-bed sets are at the top. “Steep” cross-beds in thick sets are apparently an optical illusion. Compare the small sets of the Tapeats with the thick sets of the Navajo. WHITMORE Cross-bed inclinations 2023 ICC 605
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