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pottery analysis |
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by Sarah E. Price
In addition to the traditional assignment of sherds to types, the Madison Park ceramic analysis concentrated on three questions. First, since Dead River and Hope Hull phase ceramics are not usually recovered from the same site, why are both present in the Madison Park assemblage? In essence, do these types represent distinct Late Woodland phases? Second, what functions/uses did the ceramics serve at Madison Park? Third, did vessel function change through time? The following chapter presents a discussion of the Madison Park ceramic assemblage in regard to these research questions.
Culture Historical Types Dead River Phase Kilby Plain is one of two principal pottery types associated with the Dead River phase. This sand tempered ware occurs in a jar form, described by Chase as “an amphora-shaped vessel with a deeply indented rim which formed a collar” (Chase 1998c:68). These jars have a sharp inflection at the neck forming a flaring everted rim. There are often deep tool marks or finger-smoothed grooves in the inflection (Figures 5-1 and 5-2). Vessel walls are almost straight sided until meeting a rounded or conoidal base (Figure 5-3). The exterior surface is smooth, often with pebble smoothing marks (Chase 1998c:48). Kilby Plain vessels vary greatly in size.
Figure 5-3. Reconstruction of a Kilby Plain jar. The other principal diagnostic pottery type associated with this phase is Dead River Red Filmed, which are deep hemispherical bowls with round bases and straight sides. The sand tempered ware is similar to that of Kilby Plain, but surfaces are smoother and often burnished. Interior and exterior surfaces are covered with reddish-orange film (Figures 5-4 and 5-5). This type subsumes an earlier defined type, Dead River Plain. Neither Kilby Plain nor Dead River Red Filmed vessels are decorated (Chase 1998c:48).
Hope Hull Phase Chase defined two principal Hope Hull ceramic types, Adams Plain and Montgomery Red Filmed. In his last writings on Hope Hull, he further refined those ceramic types to define early and late varieties of each. Adams Plain is a sand tempered ware on large, plain, conoidal jars (Figure 5-6). Chase defined Adams Plain, var. Kennedy, the early variety, as having a “somewhat grainy” surface texture, smooth inside and out but not burnished, with pebble “streaks” visible on the exterior (Figures 5-7 and 5-8). The rim flares and necks are tooled and slightly constricted (Chase 1998b:20, 1998:48). From his descriptions, it is difficult to visualize how Adams Plain, var. Kennedy, differs systematically from Kilby Plain. The later variety, Adams Plain, var. Adams, has a harder and more compact paste than var. Kennedy, and occurs on larger vessels (e.g., 60 cm tall and 30 cm diameter mouth). Vessel exteriors are pebble streaked and often burnished. The rim is everted, but the sharp neck inflection seen on Kilby Plain is replaced by a gradually curved neck. Lips are rounded, squared, and sometimes beveled (Chase 1998b:21, 1998c:48).
Figure 5-6. Reconstruction of an Adams Plain jar.
Montgomery Red Filmed occurs on a sand tempered ware that has reddish-orange slip on interior and exterior smoothed, often burnished, surfaces. This type is distinguished from Dead River Red Filmed by vessel form, which is invariably an inverted rim bowl in Montgomery Red Filmed. The early variety, Montgomery Red Filmed, var. Montgomery, is undecorated while the later Montgomery Red Filmed, var. Froggy Bottom has fine lined (“scratchy”) rectilinear or curvilinear incising or engraving on the exterior surface (Figures 5-9 and 5-10). Punctations (often as short slashes) co-occur with this shallow incising, frequently in incised zones. Bowl shape is often elongated, not circular. A rare form of Montgomery Red Filmed, var. Froggy Bottom bowl, known colloquially as a “pillow pot,” (Figure 5-11) has four appliqué knobs or projections at the vessel shoulder (Chase 1986a, 1998a, 1998b:21, 1998c:49).
Figure 5-10. Reconstruction of a Montgomery Red Filmed bowl.
Madison Park Ceramic Assemblage The following attributes were recorded for all sherds: surface treatment, presence or absence of surface film, decoration, and vessel part (i.e., body [n=89,641], rim [n=4,012], or base [n=441]). For rim sherds (n=4,012), additional attributes were recorded when possible: temper inclusions, vessel form, vessel diameter, rim thickness, rim profile, rim angle, tool impressions, and lip type. For the FWW analysis, a small sample (n=2,582, including rims [n=918], body sherds [n=1,613], and bases [n=51]) was measured for vessel wall thickness and observation of wear (fire clouded, erosion, and carbonization). Results Vessel Form Vessel form is best determined by rim sherds; therefore the rim analysis subset was used for the following discussion. Vessel form could not be determined for 108 of the sherds in the rim analysis subset. Bowl rims (n=2,735) are the most frequent vessel type found in the assemblage at just over 70 percent of the assemblage. Jars account for under 30 percent (n=1,141), and plates are the rarest of the three forms (n=28). The counts and percentages of the three broad vessel types appear in Table 5-1. Table 5-1. Vessel forms (based on rim sherds only).
Vessel Size Vessel thickness is directly related to overall vessel size. Wall thickness also varies depending on the intended use of the vessel (Rice 1987:227). Taller vessels need thicker walls to support the weight of wet clay while drying; if the walls are too thin, then the vessel will collapse. On the opposite end, thinner walls disperse heat better, cook food faster, and reduce the amount of time and fuel needed to process food. When vessel rim thickness was examined for each of the types, there were no statistically significant differences between any of the vessel forms. In sum, all jars had slightly thicker walls than bowls, which was expected. Vessel rim thickness is positively correlated with orifice diameter; in other words, as diameter increases, so does thickness of vessel.
Figure 5-12. Distributions of orifice diameters by vessel type (diameter in cm).
Vessel Function
Figure 5-13. Example of red slip on a Dead River bowl (FS 586).
The Hope Hull phase Montgomery Red Filmed bowls have a restricted orifice, or inverted form. Restricted forms are typically used for keeping things inside a vessel for an extended period of time or for containing liquids. Like the Dead River phase bowls, the majority of the Hope Hull bowls have both an interior and exterior slip, indicating that permeability was a consideration in the function of the vessels. Slips are more often functional than decorative, and greatly reduce evaporation of contents, or prevent moisture from getting into the contents. Montgomery Red Filmed bowls all have a wall thickness greater than 5 mm and an average orifice diameter of 24.97 cm. Dead River jars have a flared rim, and based on vessel thickness and orifice diameter are relatively large. Vessel diameters fall between 22 and 46 cm and all of the sherds measured for rim thickness yielded values greater than 6 mm. Vessels with curved necks are adapted for storing and transport of liquids; the restriction of the vessel prevents spilling. On the other hand, flares are interpreted as spouts or funnels to make pouring or filling easier. The Hope Hull phase jars from Madison Park are curved without a flare. The orifice diameters of this set of jars ranges from 26 to 38 cm, and the rim thickness for all vessels is greater than 6 mm. None of the Hope Hull jars are slipped on the exterior or interior. Vessel Decoration A majority (95.0%, n=3,812) of the rim sherds from Madison Park do not exhibit any decoration (Table 5-2). Of the decorated rims (n = 200), most are incised (n=104). Thirty-two rims are punctated and incised, and 18 are zone punctated. Twelve rims have stab-and-drag decorations, and three have a combination of punctations, stab-and-drag, and incising. One rim has incised lines and an appliqué node, and another rim is incised, scraped, and brushed. Table 5-2. Counts and percents of decorated sherds (from rim subset).
Of all the decorated rims, bowl rims (n=184) make up most of the sample. Only 4 percent of the decorated rims are jar forms. These data correspond with our current understanding of Dead River/Hope Hull ceramics, with bowls generally exhibiting a higher frequency of decorations and slip than do jars (Chase 1998a). When bowls are separated by form, the results are similar to the general bowl pattern, except for a spike in the incised incurved bowl category. Chi-square indicates that these distributions are significant. We expect to see a higher frequency of decoration on bowls than jars, but bowl rim shape (straight, incurved, or excurved) does not determine the type of decoration exhibited. David Chase’s observation—that decoration occurs only on incurved late Hope Hull (Montgomery Red Filmed, var. Froggy Bottom) bowls and not at all on earlier Dead River and Hope Hull bowls—evidently needs correction. The presence of decoration on straight-sided bowls indicates either some Dead River Red Filmed bowls are in fact decorated, or some straight-sided bowls date to the Hope Hull phase. Decoration on body and base sherds was recorded for the sherd subset analysis (Table 5-3). As expected, none of the bases (n=51) exhibit any decoration, and a majority of the body sherds (88.9%, n=1,434) do not have decoration either. The most frequent type of decoration on body sherds is incised lines (n=54) or combinations of incised lines with punctation (n=28) and stab-and-drag (n=1), all or nearly all from bowls. Two body sherds are decorated with stab-and-drag only, 28 are punctated, and one red filmed interior-exterior sherd has a drilled hole. Table 5-3. Counts and Percents of Decorated Sherds (from body subset).
Many of the decorated body sherds classified as Montgomery Red Filmed have remnants of red slip on at least one surface. Of the 356 body sherds with red slip on the interior only, two are incised. Of the 94 body sherds with red slip on the exterior only, one is incised and another is punctated. In contrast, body sherds with red slip on interior and exterior exhibit more surface decorations. Twenty-seven red slipped body sherds are incised, seven are punctated, and one is double roulette punctated. There are combinations of these, such as punctated and incised (n=5), and stab-and-drag and punctated (n=1). The distribution of slip and decoration from the rim analysis is similar to their distribution on bodies and bases. Incised lines appear more frequently across all slip application categories. However, most of the decorated rims (n=263) do not exhibit slip. Decoration on the ceramics at Madison Park occurs on all types of sherds regardless of the application of slip. Wear and UseDocumentation of wear on sherds allows for the interpretation of function and use of particular vessels and vessel forms. During this analysis, three types of wear on sherds were documented: fire clouding, exterior erosion, and charcoal encrusted on the exterior. Of the wear on sherds, fire clouding was most common, but appears on a tiny number of sherds: rims (n=4), body sherds (n=2), and bases (n=2). Fire clouds generally indicate that parts of a vessel were exposed to reducing (non-oxidizing) conditions during firing, and fire clouding above the base indicates that the vessel was placed directly in a fire during the final stage of production (Rice 1987:235). All but two of the fire-clouded sherds are decorated or exhibit slip, so nearly all are from bowls. One of the base sherds has no evident slip, but is zone punctated and incised. Of the two body sherds with fire clouding, both have red slip on the interior and exterior but no decoration. One was recovered from the same unit as an undecorated incurved bowl rim with fire clouding, though they do not seem to be part of the same vessel. The last fire clouded bowl rim is also incurved with red slip on the interior and exterior. Two jar rims exhibit fire clouding. One is plain and another zone punctated and incised. Although the sample is very small and inferences are general at best, minimally we can state that decorated and slipped bowls were exposed directly to fire during the final stages of manufacturing. Erosion on the exterior of a vessel suggests movement of a vessel while sitting upright, possibly during mixing of contents (Rice 1987:234). Two sherds (one body and one base) exhibit erosion on the exterior surface. Both were found in the same unit and level. Neither have an apparent slip on either surface, but the body sherd has stab-and-drag decoration on the exterior. The plain base with fire clouding was found in the same unit and level as the eroded sherds. Finally, one incurved bowl rim was recovered with encrusted charcoal on the exterior. This vessel does not exhibit decoration or slip. The lip is square with overhanging paste on the exterior and the vessel has an orifice diameter of approximately 30 cm. Discussion The vertical distribution of types was examined across the whole site. Dead River Phase ceramics dominate every level (Figure 5-14); particularly Kilby Plain jars (Figure 5-15).
The vertical distribution of ceramics in the rim subset at Madison Park indicates that the largest proportion (n=1,046, 30.8 percent) of the sherd assemblage came from Level 2. Eighty-five percent of the sherds (n=2891) were recovered from the top three levels (the upper 15 cm of the site beneath the plowzone). All variables were analyzed per level, but distributions do not differ significantly from the overall assemblage. For example, the frequency of bowl forms does not fluctuate greatly between levels, suggesting little change through time; therefore the assemblage can be treated as representing a single phase (Figure 5-15). This pattern appeared again and again for every variable (overhanging paste, decoration, slip, rim shape, tooling etc) recorded in this study.
Dead River phase ceramics (Kilby Plain and Dead River Red Filmed) appear throughout the levels, as well as ceramics traditionally interpreted as Hope Hull (Montgomery Red Filmed and Adams Plain). Theoretically, Dead River phase should predominate in the lower levels. But Kilby Plain appears throughout the levels in a similar distribution as all the other ceramic types; Levels 1-3 contained the majority of the sherds and Levels 4-6 yielded smaller numbers. Since Hope Hull is considered a later manifestation of Dead River, these similarities are surprising. Based on a traditional interpretation of the ceramic types present, occupation at Madison Park started during the Dead River phase and continued into the Hope Hull phase. However, the stratigraphic distribution of ceramics at Madison Park suggests continuity of all vessel types throughout the occupation. Further research on refining or combining these phases is warranted given the outcome of this study. The Hope Hull occupation at Madison Park temporally overlaps with the Autauga occupation of central Alabama. The stab-and-drag decoration seen on a tiny number of Montgomery Red Filmed sherds at Madison Park share that decorative mode with Autauga phase Bear Creek Incised vessels. This is the first documentation of stab-and-drag decoration in a Hope Hull or Dead River ceramic assemblage. We propose that these stab-and-drag decorated vessels and similarly ornamented vessels found at Autauga sites have a common origin in contact with Weeden Island populations near the Gulf coast. The stratigraphic distribution of stab-and-drag sherds at Madison Park, albeit a small sample, indicates this mode of decoration existed throughout the Madison Park occupation. This suggests that stab-and-drag should be added to the type descriptions of Dead River and Hope Hull ceramic assemblages. In conclusion, it appears that the original phase distinction between Dead River and Hope Hull based on the types presented by Chase needs revisions. Dead River phase ceramics dominate the entire ceramic assemblage. In conjunction with the radiocarbon dates obtained from this excavation, the site appears to have been occupied around AD 975, and again around AD 1009. Based on the previous date ranges proposed by Chase, this would place the site within the Hope Hull phase, not Dead River which dominates the ceramic assemblage. Unfortunately, none of the attributes examined here appear to have value in delineating phases of the Late Woodland occupation of 1MT318. |
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Last Updated:
Thursday, January 27, 2011 8:35 AM