University of Virginia Library

Summary

The refuse mound just to the east of Chaco Mound 50 represents
the sweepings of three periods, Basket Maker III, Pueblo I, and Pueblo

II. The only spot in which the Basket Maker III material is conspicuously
free from later contact is the small mound in the southeast corner
of the portion excavated. The Pueblo I sweepings cover over this
mound and extend roughly from the northeast to the southwest, with
a sharp ridge at the two ends and a wider slope in the center. The peak
of this dump in Section I is at the most eastern edge of the present excavations.
Material from this peak was undoubtedly washed onto and
mixed with the growing refuse of Pueblo II at the foot of and just to
the west of the peak of earlier material and accounts for the mixture of
material of the two periods which is more marked in Section I than
elsewhere.

The refuse of Pueblo II finally covered that of Pueblo I and spread
out beyond it, but the exact peripheries of this later mound are beneath
the drift which has since accumulated over it. The peak of the Pueblo
II refuse has been eroded until the top of the present mound is a gentle
slope on all sides.

The complexes of pottery types representing the three periods are
distinctive, although types from earlier periods are held over and types
prominent in later periods are found in small percentages in earlier
sweepings. The lack of marked profiles in the dump and this merging
of one period into the other in pottery types indicates continuous occupation
of the mound over the periods of Pueblo II and I and probably
through Basket Maker III, this first occupation being certain in the
near environs of Mound 50 if not directly upon it.

The complex which marks Basket Maker III here is made up of
Lino Gray and of La Plata Black on White.

That which marks Pueblo I is made up of Lino Gray, Red Mesa
Black on White, a smaller proportion of Escavada Black on White,
and some Exuberant Corrugated and a small amount of Gallup Black
on White.

The complex marking Pueblo II here consists of that of Pueblo I
plus a preponderant proportion of Gallup and Escavada, some Chaco
as well as Exuberant Corrugated, and a small amount of Chaco Black
on White.

Trade for Pueblo I is indicated by shards from the Mogollon districts,
from the Little Colorado and the Arizona Puerco, and from the
Flagstaff district.

Trade for both Pueblo I and Pueblo II is indicated by shards from
the Upper Gila and the Mogollon areas, from the Mesa Verde, Kayenta,
and Flagstaff districts of the San Juan, and from the Little Colorado.

There is no evidence that Mound 50 was occupied during the main
part of Pueblo III nor that the dump was used during Pueblo III.
Although it is impossible to state the exact date of abandonment of the
site, that should be set as at the end of Pueblo II or during the very

beginning of Pueblo III in the Chaco. The wall series and the pottery
complexes of Mound 50 tie in perfectly with those of Chetro Ketl and
thus amplify the sequences to extend from Basket Maker III to the
abandonment of Chetro Ketl after 1116 A. D. in Pueblo III.