22 
ANTHROPOLOGY: E. H. MORRIS 
Proc. N. A. S. 
ful groups. These groups, in their several localities, carried Pueblo cul- 
ture to its highest material perfection, at which point, for reasons as yet 
undetermined, Pueblo occupation of the San Juan area came to an abrupt 
close. As a terminating phase of late black-on- white time, there came a 
period of redistribution during which Pueblo culture was carried to the east, 
south and west. 
The correlation of specific San Juan chronology with the chronology 
of the southwest as a whole is a work much of which is still to be done. 
The only other portion of the southwest for which a definite chronology 
has been proposed is that for the upper Rio Grande Valley in New Mexico. 
This area is both historic and prehistoric, in contrast to the area of the 
San Juan, which is exclusively prehistoric. Thus, the systematic series 
for the former presents a sequence, part of which can be historically dated, 
as established by Mr. N. C. Nelson and Dr. A. V. Kidder. The chronology 
of this Rio Grande area contains the following major divisions: 
5. Modern Painted Ware 
4. Historic Two-Color Glazed Ware 
3. Three-Color Glazed and Painted Ware 
2. Two-Color Glazed Ware 
1. Two and Three-Color Ware 
No. 1 of this series is comparable to IV in the San Juan series. Our 
data may, therefore, be interpreted as indicating a shift of cultures from 
the San Juan to the Rio Grande. Since ceramic types are but the horizon 
markers for the cultural epochs to which they belong, the chronologies 
for the San Juan and the Rio Grande areas may be combined and re-cast 
as in the following : 
1. Basket Maker, or Initial Period 
2. Pre-Pueblo, or Formative Period 
3. Early Two-Color Painted Ware, or Period of Development 
4. Late Two-Color Painted Ware, or Period of Culmination and Re- 
distribution 
5. Two-Color Glazed Ware 
6. Three-Color Glazed and Painted Ware 
7. Historic Two-Color Glazed Ware 
It appears, therefore, that the establishment of a chronological scale 
for the area of the San Juan gives us a succession of cultural periods during 
the greater part of the prehistoric period for the southwest. 
A full description of the sites examined, together with a formulation of 
the evidence upon which the preceding chronological sequence rests will 
be presented in future numbers of the Anthropological Papers of the Amer- 
ican Museum of Natural History. 
