[Herbert C. Kraft et al. (1994)] Much of the charcoal submitted for species identification was unidentifiable due to mineralization, further suggesting that the charcoal from this site is unsuitable for typical archaeological analyses. formation of an argillic horizon in the site's sedimentology, a mature soil profile, and the lack of bone. A mature soil profile is one that "coarses upward, fines downward." Column 5, taken from the west wall opposite what was probably Brennan's square 10N4W, represented such a soil profile. With no exception, each successively lower level of the 12 levels excavated was composed of finer materials than the level above it. No historic or prehistoric human or animal digging had disturbed this spot in the site. While every sedimentologist asked was loath to quantify the amount of time required for such a textural distribution, all agreed that it is a long process. A shell from the small oyster horizon in Level 3 (10-15 cm bs) resulted in a raw date of 5470 ± 70. A humic acid date from Level 12, the deepest shell-matrix level, is pending. Argillic horizons, or clay bulges, form as the soils continue to mature, indicative of even greater age. Argillic horizons are visible in all the columns. Saunders et al. (1992) have used the presence of argillic horizons to substantiate the Late Archaic age of earthen mounds in Louisiana with a bulk carbon-in-soil radiocarbon date of 5345 ± 235 B.P.