The Organization of Chipped-Stone Economies at Piedras Negras ...

6.2: Examples of possible pressure-flakers and bits from Piedras Negras. .. 211
6.3: Diagram of hypothetical blade-core reduction at Piedras Negras. …… 213
6.4: Examples of polyhedral cores and macrocores from the El Chayal
source in highland Guatemala. …………………………………………….. 216
6.5: Percussion flakes removed to regularize and prepare the central
face of the core for pressure reduction. ……………………………………. 217
6.6: Percussion blade removed to prepare the central face of the core. …… 218
6.7: Distal rejuvenation blades removed to regularize the face of the core. . 219
6.8: Original percussion scars on the dorsal surface of a percussion blade. . 220
6.9: Obsidian eccentrics that were made from percussion blades removed
from the side of the core after pressure reduction had begun. …………….. 223
6.10: First-series pressure blades from Piedras Negras. …………………... 224
6.11: Second-series pressure blades and flakes. …………………………... 225
6.12: Third-series blades that feature platform planes, which are not
perpendicular to the pressure scars on the dorsal surface of the blades. ….. 228
6.13.1: Platform rejuvenation flake, faceting. ……………………………...229
6.13.2: Platform rejuvenation flake, tabular. ……………………………… 229
6.14: Obsidian eccentric made from a core rejuvenation blade, which was
removed by percussion. …………………………………………………… 230
6.15: Medial rejuvenation pressure-blade fragment (bottom) and
flake (top). …………………………………………………………………. 232
6.16: Crested blade from Piedras Negras. …………………………………. 233
6.17: Lateral rejuvenation flake from Piedras Negras. ……………………. 234
6.18: Distal rejuvenation flakes (left) and blades (right) from Piedras
Negras. …………………………………………………………………….. 235
6.19: Evidence of overshot termination on pressure blades from Piedras
Negras. …………………………………………………………………….. 236
6.20: Exhausted obsidian-core from Tres Islas that was reduced on
one or more sides, but not in the round. …………………………………... 238
6.21: Pressure-notched flake. ……………………………………………… 242
6.22: Pressure and indirect-percussion notched cores (two views
of three eccentrics separated by upper and lower series). ………………… 243
6.23: Partially-bifaced cores. ……………………………………………… 244
6.24: Completely-bifaced flakes and cores. ……………………………….. 245
6.25: Evidence for the bipolar reduction of exhausted blade-cores. ……… 248
Chapter 7: Distributional Analysis
7.1: Map of Piedras Negras depicting the spatial groupings used in this
study (1=Acropolis; 2=City Center; 3=Near Periphery). …………………. 254
7.2: Map of the acropolis at Piedras Negras. ……………………………… 255
7.3: Map of Piedras Negras depicting excavated areas of the site. ……….. 257
7.4: Burial 66 from the R Group at Piedras Negras. ……………………… 264
7.5: Map of microcrystalline-quartz production locales at Piedras
Negras during the Yaxche phase. …………………………………………. 267
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