284 



THE IRON ORE DISTRICT OF EAST TEXAS. 



Fig. 25. 



OIL BEARING GREENSAND MARL. 



A. Sandy soil. 



B. Hard greensand .... 3 to 1 2 inches. 



C. Soft greensand and trace of oil 2 feet. 



D. Softer greensand, with grains of glauconite containing nodules of iron 



sandstone and some globules of oil 3 feet. 



E. Softer greensand shell marl, containing a large percentage of oil 1 to 12 inches. 



F. Close textured glauconitic green clay with less oil 2 feet. 



G-. Aluminous fossiliferous greensand marl (no oil). 15 feet. 



In the railway cut, on the Houston East and West Texas Railway, two and 

 one-half miles northeast of the town of Garrison, is the following section : 



A. Red sandy clay soil 3 feet. 



B. Yellow gray sandy shale eight feet to bed of road, with parting' seam of iron oxide one- 



half inch, and projecting nodule of siliceous limestone. 



The dip of this section is northeast about 15°, and the beds show a slight 

 flexure. 



About one hundred yards northeast of the last locality, in another railway 

 cut, is a section similar to the upper part of the last, but in which the iron 

 seam has been folded and pushed up out of its usual place, nearly cutting in 

 two the upper thirty-inch exposure of yellow gray sandy shale. 



About five miles southeast of Nacogdoches, in the Melrose road, was seen 

 dark red clay mixed with nodular masses of orange colored clay. 



About six miles southeast of Nacogdoches, on the same road, was seen on 

 the roadside a bed of orange loam, considerably broken and crumbled by ex- 

 tensive erosive agency. There is evidence that at least a portion of this bed 

 is fossiliferous. A specimen of this material was secured which contained 

 a cast of Cardita planicosta, diameter about one and one-half inches, with 

 broken casts of several other shells which could not be identified, as only 

 small portions of the casts were visible. 



On Simpson's Hill, four miles northwest of Melrose, the sixty feet of red 

 clay is overlaid by five feet of orange loam, and this in turn by twenty feet 



