Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Archaeological Monuments Zone of Xochicalco' has mentioned 'Obsidian' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| In 1976 archaeologist Kenneth Hirth of Pennsylvania State University began a multi-season fieldwork project in which he mapped the entire site and conducted excavations of houses and obsidian workshops. | WIKI |