Fig 1.
A. Central East Polynesia; B. Marquesas Islands; C. Nuku Hiva, major valleys and volcanic zones (after [26]).
Fig 2.
Scatterplot of Sr versus Nb for Marquesan rock samples by island.
The reference dataset combines the specimens analyzed for this study with those in the GEOROC database (n = 905). Fig 2A shows the entire range of concentrations; Fig 2B shows the region including the majority of the artifacts. The main artifact cluster is enclosed in gray.
Fig 3.
Bivariate plot of Sr against Nb for the fine-grained reference samples.
Fig 4.
Classification tree for the reference specimens.
Terminal nodes are identified in gray.
Table 1.
Node membership for classification tree analysis.
Modal sources are underlined; terminal nodes are shaded.
Fig 5.
Examples of 2D and 3D projections for the initial discriminant function analysis.
Fig 6.
Scatterplots of the discriminant functions.
1. division into three groups; 2. separation of Group A; 3. separation of Group B; 4. separation of Group C. Classification boundaries are shown as dashed lines.
Table 2.
Comparison of the results for the discriminant function and classification tree analyses.
Fig 7.
Distributions of adze, chisel, and preform specimens by valley.
Bar lengths indicate proportions (%); numbers show counts. The red dashed line shows the approximate supra-tribal alliance boundary as known in the 19th century.
Table 3.
Artifact source assignments by valley.
Modes for each source are underlined.
Fig 8.
Distributions of cross-section area by source island, separated by cross-section shape.
Normal curves are superimposed over the distributions.
Table 4.
Adze cross-section shapes by assigned source.
Modes for each source are underlined.
Table 5.
Frequencies of tools associated with small and medium/large domestic structures by assigned source.