C. R. Gordon — Chalk Formations of Northeast Texas. 373 



chalk formations occur in lenses rather than as persistent 

 formations. 



Conclusions. 



1. The stratigraphic relations of the Annona chalk shows 

 conclusively that it is the equivalent of the upper part of the 

 Austin chalk formation of central Texas. 



2. That the Brownstown marl, which underlies the Annona 

 in northeast Texas and western Arkansas, is the stratigraphical 

 equivalent of the lower portion of the Austin. 



3. That the term Austin should be used for the formation 

 as a whole, while the names Annona and Brownstown may be 

 used to designate the chalk and marl members respectively. 



4. For the sands at the top of the Eagle Ford formation, 

 which are of importance in certain areas as a source of water, 

 the name Blossom is here proposed. The Clarksville wells 

 draw their supply of water from these beds, in view of which, 

 in the absence of knowledge of the outcrop of the formation, 

 Yeatch called them the Sub-Clarksville Sands. 



Knoxville, Term. 



