Garrison et al. (2010) are the latest among several authors to claim significant Gulf level fluctuations in the last several millennia (see discussions inOtvos 2001, 2004, 2005a). The onus in their particular case rests on the rather unusual assumptions by Tanner (1992), who linked granulometric kurtosis values and his subjective age estimates of the progradation rate of a St. Vincent Island, NW Florida ridgeplain sequence to late Holocene climate and sea-level changes. The recurring major sea-level and shoreline shifts proposed by Garrison et al. can not be reconciled with the straightforward subsurface documentation presented.

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