| This layer appears to correspond to the Westphalian-Stephanian Series boundary of western Europe and the Desmoinesian-Missourian boundary in the midcontinent of North America. |
| The Ordovician faunas described herein represent both the Midcontinent and Atlantic faunal realms. |
| Lake Superior in North America, the largest freshwater lake by area, lies in the ancient and dormant Midcontinent Rift. |
| Coeval cyclothems in the western midcontinent have better development of the marine portion of the sequence with fewer and thinner coals. |
| In this short time those figures were insufficient to have an effect on overall snow goose survival, and population size of the midcontinent region. |
| Midcontinent is one of the nation's largest independent cable companies, with more than 250,000 customers in North Dakota, South Dakota, and Minnesota. |
