Culture and Ecology of Chaco Canyon and the San Juan Basin

Figures1.1. Map outlining the San Juan Basin, which is located at the southeastern edge of .the Colorado Plateau .............................................. 21.2. Map of the Chaco Basin ............................................ 31.3. Map of Chaco Culture NHP, locating Pueblo sites excavated by the Chaco Project ....... 51.4. 1929 oblique aerial photograph of Chetro Ketl .............................. 91.5. 1929 aerial photograph of small house site and unfinished great house (29S12384)excavated by Frank H. H. Roberts, Jr. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 102.1. Map of the 19 sub-basins of the Chaco Basin . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 232.2. Geomorphic features of the Chaco arroyo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 272.3. Schematic cross-section of alluvial fill in the Chaco Wash ..................... 292.4. Precipitation contours for the San Juan Basin ............................. , 332.5. Vegetation map of Chaco Canyon prepared by Potter and Kelley (1980) ............ 392.6. Environmental changes in Chaco Canyon ................................ 482.7. Environmental reconstruction based on study of macrobotanical remains recoveredfrom pack rat middens ............................................ 492.8. PDSI plotted in 25-year increments from A.D. 901 through 1325 ................ , 543.1. Archaic and Basketmaker II sites recorded during the inventory survey . . . . . . . . . . . .. 653.2. Examples of Archaic and Basketmaker III dart points and preforms ............... 693.3. Location of Archaic sites near Cly's Canyon . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 713.4. Location of Archaic rockshelters and dune sites investigated in the rincon westof Cly's Canyon ................................................ 723.5. Overview of 29SJ1118, a stone masonry quarry . . . . . . . . . . . . . . . . . . . . . . . . . . .. 733.6. Overview of 29SJ116 ............................................ , 733.7. Map of excavations at 29SJ116 ...................................... , 743.8. Overview of 29S1126 ............................................. 753.9. Map of excavations at 29SJl26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 763.10. Map of trenches at 29SJl26, indicating materials recorded during excavation . . . . . . . .. 773.11. Overview of Atlatl Cave and Owl Roost Shelter . . . . . . . . . . . . . . . . . . . . . . . . . . .. 793.12. Overview of AtIatl Cave with steep talus visible in foreground .................. 793.13. Map of Atlatl Cave, showing grid layout and excavated areas ................... 803.14. Map of Atlatl Cave, showing areas A and B, the locations of artifact concentrations. . . .. 813.15. Pictographs in Atlatl Cave, including the broad-shouldered man. . . . . . . . . . . . . . . . .. 833.16. Sandal and atlatl fragment recovered from Grid 30, Area B, of Atlatl Cave .......... 833.17. Overview of dune ridge location of Sleeping Dune " ...................... " 843.18. Map showing relationship of Ant Hill Dune and Sleeping Dune . . . . . . . . . . . . . . . . .. 853.19. Map of grid system at Sleeping Dune ................................. " 863.20. Map of grid system and artifacts recovered at Ant Hill Dune .................. " 87vii