The Goodall Focus was a Hopewellian culture from the Middle Woodland period peoples that occupied Western Michigan and northern Indiana from around 200 BCE to 500 CE. Extensive trade networks existed at this time, particularly among the many local cultural expressions of the Hopewell communities. The Goodall pattern stretched from the southern tip of Lake Michigan, east across northern Indiana, to the Ohio border, then northward, covering central Michigan, almost reaching to Saginaw Bay on the east and Grand Traverse Bay to the north. The culture is named for the Goodall Site in northwest Indiana.
Goodall Focus Wikipedia
Ceramics tend to come from middens and contain expanding and contracting stemmed projectile points and obsidian flakes. Research has been on-going through the 1990s at sites in northwest Indiana, the Galien River Basin, the Kalamazoo River Basin and the Grand River basin.