The Most Similar States to the Great Plains Region

1. Nebraska, 2. South Dakota, 3. Iowa, 4. Kansas, 5. North Dakota

The Most Similar States to the Great Lakes Region

1. Ohio, 2. Michigan, 3. Wisconsin, 4. Illinois, 5. Indiana

The Most Similar States to the Midwest

1. Wisconsin, 2. Iowa, 3. Ohio, 4. Minnesota, 5. Indiana

The Most Common Types of Mines per State

2 most common types of mines per state