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Neolithic Danish Dagger as a model to replicate parallel, edge-to-edge pressure flaking
Figure 21. Photograph of dagger
number eight.
Presentation of data
Grinding
Figure 22(a) Completed obsidian
dagger number three; (b) completed
by Greg Nunn and Joe Pachak.
The number of grinding strokes to complete each dagger was recorded. An
average of 1,700 strokes per hour was accomplished. It is possible to com
plete more strokes per hour, but one is continuously evaluating and record
ing the progress. Evaluating the progress reduces grinding time.
All obsidian daggers were ground on Chinle sandstone enhanced with ap
greatest length was 40 cm, greatest width 23 cm, and greatest thickness 6.5
cm. Upon completion of grinding four obsidian daggers, a total of 4 cm in
thickness was lost from the grindstone. Weight data was not retrieved.
105