A specialized obsidian quarry at Otumba, Mexico: implications for the study of Mesoamerican obsidian technology and trade
JE Clark�- Lithic Technology, 1979 - Taylor & Francis
JE Clark
Lithic Technology, 1979•Taylor & FrancisFig. 1. This is an illustration of a plastic measuring device designed by RL Bettinger to
measure edge angles on artifacts. Angles are measured at 5 intervals from 5 to 90. The�
device is somewhat like a goniometer, but the cut out side makes measurements both easier
and more accurate. The swinging arm is painted white to facilitate reading on the scale. The
drawing is approximate.
measure edge angles on artifacts. Angles are measured at 5 intervals from 5 to 90. The�
device is somewhat like a goniometer, but the cut out side makes measurements both easier
and more accurate. The swinging arm is painted white to facilitate reading on the scale. The
drawing is approximate.
Fig. 1. This is an illustration of a plastic measuring device designed by RL Bettinger to measure edge angles on artifacts. Angles are measured at 5 intervals from 5 to 90. The� device is somewhat like a goniometer, but the cut out side makes measurements both easier and more accurate. The swinging arm is painted white to facilitate reading on the scale. The drawing is approximate.
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