CORRELATION OF THE MIDDLE AND UPPER DEVONIAN 
AND THE MISSISSIPPIAN FAUNAS 
OF NORTH AMERICA? 
STUART WELLER 
V 
INTRODUCTION. 
NortH AMERICAN DEVONIAN PROVINCES. 
The Eastern Border Province. 
The Eastern Continental Province. 
Middle Devonian of the Eastern Continental Province. 
Upper Devonian of the Eastern Continental Province. 
The Interior Continental Province. 
Middle and Upper Devonian of the Interior Continental Province. 
Junction of the Eastern Continental and Interior Continental Provinces. 
The Western Continental Province. 
NortH AMERICAN MISSISSIPPIAN PROVINCES. 
The Mississippi Valley Basin. 
The Southern Kinderhook Fauna. 
The Northern Kinderhook Fauna. 
Early Mississippian Faunas of the Appalachian Basin. 
Post-Kinderhook Faunas of the Mississippi Valley Basin. 
Mississippian Faunas of the Appalachian Basin. 
Mississippian Faunas of the Rocky Mountain Basin. 
Mississippian Faunas of the Western Continental Province. 
INTRODUCTION 
In its essential features a problem in geologic correlation is an 
investigation in the parallel histories of two or more regions, basins, 
or provinces, involving the points of contact between these areas. 
Since it is the fossil faunas which most satisfactorily indicate these 
points of contact, correlation problems, as applied to the stratified 
rocks of an age younger than the pre-Cambrian, are largely questions 
in paleontologic interpretation. 
All questions in correlation become progressively more complex 
as the territory occupied by the faunas under consideration is extended. 
t Read before Section E of the American Association for the Advancement of 
Science, Baltimore, Md., December, 1908. 
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