The Devonian - Carboniferous boundary was realigned based on research from Europe .
Various geologists were not aware of the changes and so incorrectly assigned Berea Sandstone to the Kinderhookian ( early Mississippian ) .
The Devonian - Carboniferous boundary was realigned based on research from Europe , but various geologists were not aware of the changes and so incorrectly assigned Berea Sandstone to the Kinderhookian ( early Mississippian ) .