Assertion: obsidian | /r/HasProperty | critical material
Facets:
value: in precolumbian mesoamerican economies
type: LOCATION
Source sentences:
text: It is clear that obsidian was a critical material in Precolumbian Mesoamerican economies; it is ubiquitous throughout the region, and found in the material record of all cultures and time periods.
text: It is clear that obsidian was a critical material in Precolumbian Mesoamerican economies; it is ubiquitous throughout the region, and found in the material record of all cultures and time periods.