The writers have been studying certain Cretaceous chalks of Texas and Arkansas during the past 4 years. Joseph A. Cushman is now working on the material thus accumulated and as fast as he completes specific identifications and illustrations the writers will discuss the stratigraphy and subsurface aspects of the various chalks. One paper is practically ready for publication. Certain preliminary notes on stratigraphy such as the following may be published in the Bulletin of The American Association of Petroleum Geologists.

Micro-faunas are exceptionally good for accurate correlation, if care is taken to notice variations due to time and character of...

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.