GREGG COUNTY. 163 



Great Northern Railway, crossing the Sabine River. This section gives the 

 following : 



1. Brown ferruginous sand, with siliceous pebbles and small quantities of 



nodular iron ore .... 20 feet. 



2. Dark greenish gray micaceous sands 10 to 15 feet. 



3. Thin seams of earthy lignite and alternate layers of dark colored sand 



(the thickest bed of lignite does not exceed ten inches at any point) ... 2 to 5 feet. 



4. Dark bluish or slate colored sandy clay to water 2 to' 8 feet. 



These strata have an apparent dip to the south (or with the course of the 

 river, which is here a few degrees to the east of south), but are somewhat 

 irregular and wavy in their form. 



At the iron bridge on the Longview and Kilgore public road a bluff on 

 the south side of the river gives the following section : 



1. Brown sand, with broken fragments of laminated iron ore and ferruginous sand- 



stone with a few broken nodules of concretionary iron ore 5 feet. 



2. Brown sand with streaks of white sand 20 feet. 



3. Light colored, almost white, sand of same texture as No. 2 and apparently be- 



longing to the same deposit 10 feet. 



4. Light blue micaceous sand 25 feet. 



5. Gray sand . 20 feet. 



6. Blue sandy clay to water 10 feet. 



90 feet. 

 The next most prominent section is taken from a bluff on the south side of 

 the Sabine River, at Iron Bridge Postoffice. This bluff follows the course of 

 the river for nearly half a mile, and its wall-like face forms a formidable ob- 

 struction to the river's tendency to turn southward. The following is a sec- 

 tion of this bluff taken at the bridge: 



1. Surface deposit of dark brown or coffee colored sand, with broken fragments of 



sandstone 6 feet. 



2. Heavy bed of yellowish brown sandstone, soft when freshly cut but weather- 



ing hard on exposure. (This bed has been quarried at different places farther 



down the river, as well as at this place, and used for building purposes.). ... 6 feet. 



3. Brown sand, similar to No. 1 6 feet. 



4. Brown or yellowish brown sandstone, similar to No. 2 but softer and more fri- 



able, with alternate strata of a similarly colored sand 10 feet. 



5. Brown or yellowish brown colored sand, containing occasional nodules of iron 



ore, to level of water. (This sand strongly resembles, in color and texture, the 

 underlying roughly stratified sands in the northern part of the county.) .... 12 feet. 



40 feet. 



The trestle supporting the south end of the bridge rests upon the upper 

 side of No. 2. 



The extent, position, and formation of these two bluffs — the upper one at 

 the crossing of the Longview and Kilgore road and the other or lower one at 



18-geol, 



