A 2004 paper by Dennis Curry and Maureen Kavanagh (available online here) describes excavations at the Rosenstock Village site (18-Fr-18) in Frederick County, Maryland.  The main deposits at the site are associated with the Late Woodland Montgomery Complex, dating to the fourteenth century AD.  Again I thank Dr. Dennis Curry for bringing the site and report to my attention.

Two "keyhole" structures (Features 2 and 27) were identifed.  Feature 27 is shown in the illustration to the right (from Curry and Kavanagh 2004:14, Figure 19).  At the Rosenstock site, these small (< 5 square meters) elliptical, semi-subterranean structures were interpreted as the probable remains of sweat lodges.  While similar structures have been interpreted as sweat lodges at other sites, there has been some debate about whether "keyhole" structures may be the remains of houses or storage features (see MacDonald 2008; Smith 1976).

The two structures from Rosenstock will be added to the database as Structures 2253 and 2254.

Excavations in 2002 and 2003 exposed two domestic post structures at the Winslow Site (18-Mo-9) in Montgomery County, Maryland.  These structures are described in a 2005 report by Richard Dent in Maryland Archaeology.  I thank Dr. Dennis Curry for making me aware of the structures and sending me a copy of the paper.

The outlines of both structures can be seen in the illustration to the right (Figure 5 from Dent 2005:11).  Various features and segments of a palisade were also exposed.  The structures were attributed to the Montgomery Complex and believed to date to the mid-fourteenth century AD.  They will be added to the database as Structures 2251 and 2252.