| OCR Text |
Show Table 5.14. Proportion of flakes within various raw material classes that retain dorsal cortex, also proportion of flakes with cortex by temporal period (excludes flakes of sandstone and indeterminate material, as well as those with indeterminate cortex). Raw Material Total Flakes Cortical Flakes Percent Cortical Archaic % Cort BM II % Cort Puebloan % Cort Chert NSF 209 49 23.4 5.6 19.5 35.7 Other chert 228 25 11.0 3.3 8.3 25.9 Owl Rock chert Navajo/local lag chert Glen Canyon chert 14678 701 4.8 2.4 3.7 7.5 7817 1959 25.1 9.6 10.4 46.7 15806 1657 10.5 3.6 13.4 15.5 Chalcedony 2285 159 7.0 4.8 6.5 8.0 Petrified wood 2288 153 6.7 3.8 5.0 16.2 Quartzite 3610 300 8.3 3.7 7.5 11.9 Silic. conglom 1999 84 4.2 0.0 0.0 4.4 Igneous 47 10 21.3 25.0 25.7 25.0 Obsidian 890 28 3.1 3.2 5.9 0.0 Siltstone 489 15 3.1 2.9 0.5 18.2 Limestone 270 9 3.3 10.0 3.8 5.0 50616 5149 10.2 4.1 7.8 17.0 Total V.5.49 |
