50 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I47 



the famed hachured varieties of the Late Bonitians are both generally 

 missing. At Penasco Blanco, on the other hand, Roberts's stratigraphy 

 reveals Transitional and Degenerate-Transitional from bottom to top, 

 Chaco-San Juan and other late varieties in the upper strata only 

 (U.S.N.M. Nos. 334166-168). This sherd record, coupled with a 

 section of first-type, or Old Bonitian, masonry visible on the north- 

 west side (the only ruin other than Pueblo Bonito where such 

 masonry is known to occur in Chaco Canyon) suggested to Roberts 

 that Penasco Blanco was founded about the same time as Pueblo 

 Bonito but may have been abandoned a bit earlier. 



Potsherds we gathered in 1920 and 1925 from the surface at 

 Chettro Kettle, Hungo Pavie, Una Vida, Weje-gi, and Pueblo Pintado 

 likewise include relatively few Transitional and associated Old 

 Bonitian fragments in proportion to later varieties such as the three 

 hachured types, our organic-paint Chaco-San Juan or McElmo 

 Black-on-white, and Corrugated-coil Culinary. This preponderance 

 of late over early varieties of pottery suggests to me an outward move- 

 ment from Pueblo Bonito — an outward movement which other stu- 

 dents will dispute and which, admittedly, is not fully substantiated by 

 our too-short list of constructional dates. 



The number and range of tree-ring dates from major Chaco Canyon 

 ruins, originally reported for the Pueblo Bonito Expeditions by 

 Douglass (1929, 1935), have recently been reviewed by Smiley 

 (1951) and Bannister (1959) and are Hsted herewith, from Penasco 

 Blanco eastward to Pueblo Pintado, the out-of -canyon sites being 

 grouped at the end: 



Range of 



Ruin Number cutting dates 



Penasco Blanco (18) 898-1087 



Ruin 9 (Casa Chiquita) (1) -1060 



" 8 (Kin Kletso) (17) 1059-1178 



Pueblo del Arroyo (35) 1025-1117 



Pueblo Bonito (71) 828-1126 



Chettro Kettle (351) 911-1116 



Hungo Pavie (14) 942-1077 



Una Vida (8) 847-1048 



Weje-gi (1) -1027 



Pueblo Pintado (2) -1060 



Pueblo Alto (N. cliff) (0) 



Sin-kle-sin (S. cliff) (2) -1111 



Kinklizhin (Black House) (1) -1084 



Kinbiniyol (9) 941-1124 



Kinya-a (Pueblo Viejo) (6) 1097-1106 



