Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Monumental Earthworks of Poverty Point' has mentioned 'Trade' in the following places:
Occurrence Sentence Text Source
Archaeologists such as Sherwood Gagliano and Edwin Jackson support the interpretation that Poverty Point was a site where groups came to meet and trade on an occasional basis.
Based on the distant geological sources of different kinds of stone used to make lithic artifacts recovered at Poverty Point, archaeologists conclude that the inhabitants were active in trade with other Native Americans.
Other materials derived from trade that included soapstone from the southern Appalachian Mountains of Alabama and Georgia, and galena from Missouri and Iowa.
Archaeologists assumed that the presence of copper artifacts indicated trade with copper-producing tribes in the upper Great Lakes region.
Thus, an extensive trade network for rocks and minerals from hundreds of kilometres away played a key role in the Poverty Point phenomenon.