CORRUGATED: Something formed or made into wrinkles, ridges, or grooves. Corrugated pottery is usually corrugated on the exteriors of vessels with the interiors being smooth. Very rarely are vessels corrugated on the interiors, only two examples are currently known. One is a Mogollon Tularosa Fillet Rim bowl with a "normal" exterior fillet rim, and a smeared corrugated smudged interior. The other is a Salado Red bowl with a plain corrugated and blackened interior.
Many corrugated vessels appear lightly to moderately smoothed or polished over the corrugation. Even though corrugated pottery was made with wet clay, many vessels appear dry and rough. Some ceramicists may consider the "polished" and non-polished examples as varieties, but most do not differentiate them as there are several levels of polished, rubbed, or smoothed examples. Below is a list of descriptions of the many styles or varieties of corrugation:
Clapboard: Coils are pushed down over lower coils and appear to "hang over" each other in profile.
Coiled: Coils appear stacked on top of each other, are round in profile, and have nothing externally done to them. AKA: Plain Corrugated.
Festoon: Indented corrugation that appears wavy. Coils appear to have been pushed down at both ends of the "waves". Indentions are usually widely spaced and in somewhat vertical alignment.
Fillet: Fillets are narrow bands, so fillets and corrugation are one and the same when talking about pottery. Fillets in some Mogollon pottery descriptions describe narrow bands of fine corrugation such as Tularosa Fillet Rim. Tularosa Fillet Rim have a few to several "fillets" of fine indented or clapboard corrugation near the rims of bowls. In at least one publication Fillets are described for certain Cibola Neck Corrugated types (Hays-Gilpin, 1998;122) these are coils that have been flattened although photographed sherds of some of these appear not to be flattened, but have rather plain round coils (Hays-Gilpin, 1998;126).
Flattened: Coils that have been flattened and do not "hang over" each other as Clapboard Corrugation does.
Grooved: Coil junctures are grooved. Varieties: Plain or Flattened.
Indented: Coils are indented usually with the end of the finger, fingernail, or a tool. Usually it is indented clapboard corrugation, rarely indented flattened corrugation. Indentions can be shallow or deep.
Obliterated: Technically misnamed, currently in the pottery world it means smeared or partially obliterated corrugation. Totally obliterated corrugation is smooth plainware. For a vessel to qualify as obliterated or smeared variety compared to corrugation that has been smoothed or polished over, it must have many partially obliterated coil junctures or many areas that are totally obliterated. Some vessels may almost be completely obliterated. There are two varieties of smeared or obliterated corrugation: Clapboard and Indented.
Patterned: Angular (rarely curvilinear) motifs of one type of corrugation in another type of corrugation. usually indented corrugated motifs in clapboard corrugation.
Plain: (see coiled)
Smeared: (see obliterated)
Spiral-Rub: Ridges are formed while indenting the corrugation, these ridges run from the bottom to the top of the rim in a spiral pattern and they have been rubbed or polished over.
Wavy: (see festoon)
Zoned: Banded segments of at least two different kinds of corrugation usually clapboard and indented. Occasionally punched pands are included, usually at the rim.
To view examples of each type of corrugation visit the glossary at: http://rarepotteryinfo.siteprotect.net/protect/Glossary.htm
