THE ARKANSAS COAL MEASURES IN THEIR RELA- 

 TION TO THE PACIFIC CARBONIFEROUS 

 PROVINCE.^ 



CONTENTS. 



Introduction. 



Comparison with the Permo-Carboniferous of Kansas and Nebraska. 



Relations to the Texas Upper Carboniferous. 



Comparison with Foreign Upper Carboniferous. 



The Lo-ping Fauna, of China. 



The Salt Range Beds, India. 



The Itaituba Fauna, Brazil. 

 Classification and Age of the Arkansas Coal Measures. 



Provisional Classification. 



The Lower Coal Measures. 



The Upper Coal Measures. 



Paleobotanic Evidence. 

 The Pacific Carboniferous Sea. 



Revolution in Devonian Time. 



The Carboniferous Sea. 



Upper Carboniferous in the West. 



The Pawhuski Limestone. 



Interchange of Life between East and West. 



Replacement of Limestones by the Coal-bearing Formations in Western 

 Europe. 



Land Areas in the West. 

 The Permian Pacific Ocean. 

 The Triassic Pacific Ocean. 



Correlation table of the Arkansas Coal Measures with the Pacific Carboniferous 

 Province. 



INTRODUCTION. 



Marine fossils of Coal Measure age were found by the Geo- 

 logical Survey of Arkansas in eighteen places, fourteen in the 

 lower division and four in the upper. These localities extend 

 from Independence county westward to Indian Territory, and 



^ From an unpublished report of the Geological Survey of Arkansas, by permis- 

 sion of the Director, John C. Branner. 



187 



