92 • PBOCEEDINGS OF THE ACADEMY OF [1895. 



Stages. Sub-stages. Thickness. 



Feet. 



Frio Clays 160 



Fayette Sands 400 



Yegua Clays 1,000 



Marine Beds 650 



[ Queen City Beds 60-70 



( Lignitic Beds 1,000 



AT . i ( Basal or Wills Point 

 Midway < ™ „„.. 



J { Clays . 260 



v 

 o 



W 



■r. 



w 



Lower Claiborne 

 Lignitic 



The above section includes the whole of the Eocene deposits 

 recognized in east Texas. As noted by Dr. Loughridge 11 the white 

 limestones of the Claiborne are absent and neither the Vicksburg 

 nor Jackson stages have been recognized, either paleontologically or 

 stratigraphically, although both of these are reported as occurring 

 a few miles to the eastward in Louisiana. The celebrated Claiborne 

 sands are also absent. 



No strata that might lithologically be referred to the Ostrea sel- 

 Iceformis beds have been recognized. O. selheformis var. divari- 

 cata Lea, occurs in considerable numbers throughout the upper 

 division of the Marine beds, and although increasing, in number as 

 this fossil ascends the scale, it can nowhere be said to be more chaiv 

 acteristic of any of the beds than many of the other species found 

 in association with it. This form of Ostrea has a vertical range of 

 a little over two hundred feet. 



It may also be said that no deposits corresponding to the Buhr- 

 stone of the Alabama section have been recognized anywhere 

 throughout East Texas. The only deposits that might possibly be 

 referred to this stage are the Queen City beds of red and white 

 sands and clays, and even these, although filling the position occu- 

 pied by the Buhrstone, do not correspond to any member of that stage 

 lithologically, and besides, they are altogether unfossiliferous. 



The lignitic formation, as recognized in the Texas sections, contains 

 no such divisions as those characterizing the Alabama lignitic. 

 From its base to contact with the overlying marine beds the Texas 

 lignitic is made up entirely of sands, clays and lignites, and with 

 the exception of a few broken plant remains the extended investiga- 

 tions of the Geological Survey have disclosed neither fossils nor green 

 sands. It may be said to be altogether unfossiliferous. 



11 Cotton Production of Southern States, Tenth Census, Vol. V, Part II. 



