The presence of chert and chert chips ... The presence of stones, such as obsidian, that are non-native to Minnesota and from locations in Wyoming and North Dakota, supports the contention ...

Cole Premo is digital manager for CBS Minnesota. For more than a decade, he's been covering breaking news and weather, daily topics, stories from the Native community and more in Minnesota.

However, the chert from the quarry has been found across a wide region, including the Dakotas, Iowa, Minnesota and Wisconsin, which shows how this quarry impacted the lives of American Indians ...

You’re going to die while exploring here. Kind of often. A quick note: Chert will say that the sand eventually drains off of Ember Twin. While this may be true, it doesn’t happen within the ...