REVIEW OF PREVIOUS WORK 455 



are every one in tlie form of wood opal or in an opalized condition, vitreous 

 and clear when broken, breaking with sharp cutting edges, and retaining every 

 mark and line of growth as it appeared in the tree. The outside of these 

 woods is generally a dull white, showing a process of decay. This form of 

 wood is peculiar to the Fayette (Corrigan) sands and occurs nowhere else 

 within the Texas regions." 



Dumble/^ describing the section along the Texas & New Orleans Bail- 

 way between Beaumont and Rockland, refers the clay beds around Wood- 

 ville, described by Kennedy-*^ as Fleming, to the Lagarto on account of 

 their stratigi-aphic position and lithologic resemblance. The contact of 

 these Lagarto clays with the underlying Oakville was described as cross- 

 ing the line of road 21/2 miles south of Eockland. The Lapara was not 

 recognized in this section. 



Veatch, in connection with his investigations of the water resources of 

 Louisiana and Arkansas, studied the geology of a portion of eastern- 

 Texas. Examining the beds-' 4 miles north of CoiTigan, he found, in 

 addition to the fossils collected by Kennedy, a number of others which 

 made necessary the reference of this portion of the beds to the Jackson. 

 These included :^^ 



Levifusus 'branneri Maszalina var, oweni 



Just below Robinsons Ferry, on the Sabine River, he foimd the Jack- 

 son clays well exposed. Two other fossiliferous beds are noted farther 

 down the river. He also mentions Jackson fossils near Caddell and large 

 bones (probably Zeuglodon) east of the Sabine, on Caney Creek.^^ 



The sands immediately overlying the Jackson, beginning just south of 

 Piney Creek and extending south of Corrigan to Moscow, he refers to 

 the Catahoula, which, as shown by the geologic map accompanying his 

 report, also includes the sands at Rockland. 



He states that, in order to furnish a name not likely to be misunder- 

 stood,^" the name Catahoula formation is \ised as a synonym for the 

 "typical Grand Gulf,"' or the "Grand Gulf proper," which immediately 

 overlies tlio Yicksburg and is of Oligocene age. East of the Mississippi 

 the sands a])parently gi-ade into the Chatalioochee group of sands and 

 clays. 



He also describes the Fleming clays of KouDcdy which overlie his 

 Catahoula, and since no marine fossils were IouikI in them except near 



^Dumble: Disc. Lucas Well. Trans. A. I. M. E., 1001. vol. :U, p. 4031. 



-■" Kennpfl.v : Thli-tl Ann. Ucpt- fieol. .Surv. Texas, p. (;:.'. 



=7 Voatcli : U. S. Geological Survey Prof. Taper No. IC. |i. :!0. 



^Harris: Ct-ol. Surv. Louislan:!. 1002. p. '-!.">. 



=» Veatcb : Geol. Surv. Louisiana, 19012, p. 130. 



*>Veatcli: U. S. Geological Survey Prof. Paper No. 40, p. 42. 



