As the Woodland period progressed, local and interregional trade of exotic materials greatly increased to the point where a trade network covered most of the Eastern United States. Throughout the Southeast and north of the Ohio River, burial mounds of important persons were very elaborate and contained a variety of mortuary gifts, many of which were not local to the area. Because of the similarity of earthworks and burial goods, researchers assumed a common culture called the Hopewell c ...

See also:

Woodland period in southeastern North America, Woodland period in southeastern North America - Early Woodland Period 1000 to 300 BCE, Woodland period in southeastern North America - Middle Woodland Period 300 BCE to 500 CE, Woodland period in southeastern North America - Late Woodland Period 500 to 1000 CE

Read more here: » Woodland period in southeastern North America: Encyclopedia II - Woodland period in southeastern North America - Middle Woodland Period 300 BCE to 500 CE