. Bulletins of American paleontology. 14 Bulletin 314 with tips facing either way. A current from the south is suggested at section 4 and possibly section 11 on the western side of the Cincinnati Arch region. The distributions at sections 5 and 12 on the northwestern side of the region are somewhat bilaterally symmet- rical. This could reflect oscillating southwest-northeast and southeast-northwest currents at sections 5 and 12, respectively, if orientation was parallel to these direc- tions. If the corals were rolled perpendicularly, the currents may have been from the southeast and (or) nort
. Bulletins of American paleontology. 14 Bulletin 314 with tips facing either way. A current from the south is suggested at section 4 and possibly section 11 on the western side of the Cincinnati Arch region. The distributions at sections 5 and 12 on the northwestern side of the region are somewhat bilaterally symmet- rical. This could reflect oscillating southwest-northeast and southeast-northwest currents at sections 5 and 12, respectively, if orientation was parallel to these direc- tions. If the corals were rolled perpendicularly, the currents may have been from the southeast and (or) northwest at section 5, and southwest and (or) north- east at section 12. On the northeastern side of the region at sections 13, 14, and 1, orientations suggest currents from the south and west. Unfortunately, few paleocurrent data from the Richmond Group of the Cincinnati Arch region are available for comparison. Bucher (1919, fig. 14h-k) presented a small number of pararipple strike directions. The predominant direc- tion in Indiana is east-northeast, but the significance of this is uncertain because localities from which data were combined are widely separated. Strike directions in Oldham County, Kentucky, are predominantly east-west. This is consistent with solitary coral ori- entations at section 4. Strike directions in Adams County, Ohio, and Fleming County, Kentucky, are predominantly north-northwest and north-south, re- spectively. These trends are consistent with coral ori- entations at section I. Potter and Pettijohn (1963, fig. 4-15) found that megaripples in limestones of the Cin- cinnatian Series, including a few from the Richmond- ian Stage in the vicinity of section I, commonly strike approximately north-south. The average cross-bed- ding direction is to the west, although directions in quadrants containing Richmondian strata are to the north, south, and east. G. canadensis does not have a base of attachment, and clusters of individuals growing in lateral contact are
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