100 THE IRON ORE DISTRICT OF EAST TEXAS. 



4. Ferruginous sandstone and laminated iron ore in beds of various thicknesses, 



from one inch to twelve or more feet. - 12 feet. 



5. Laminated or thinly stratified white and red sands and sandy clays, merging 



into and forming a part of the mottled sands found in various parts of the 



county, sometimes thickening into six feet deposits of clay 80 feet. 



6. Greensands indurated and laminated and mtcrstratificd with small beds of lami- 



nated iron ore. These sands in the vicinity of Jefferson arc gray, grayish 



brown, greenish, greenish brown, and brown 16 feet. 



1. Black micaceous sands and sandy clays, forming the upper portion of the lig- 

 nitic beds of Eastern Texas, and alternate series of lignites and gray and 

 black clays V* 6 fect - 



916 feet 



ECONOMIC MATERIALS! 



The economic materials of Marion County are chiefly iron ores, clays, and 

 lignites. There are some small deposits of greensands at various places, but 

 these are of comparatively little economic value. 



IRON ORES. 



The iron ore deposits of Marion County belong to the great belt of ores 

 lying in a generally northeast and southwest direction through the various 

 counties composing the eastern division of the State. 



These ores are chiefly of the geode, or nodular concretionary variety of 

 limonite, although the other varieties, laminated and conglomerate, are pres- 

 ent in considerable quantities. 



Northward in Cass County the ores represented are chiefly nodular, with 

 thin scattering deposits of laminated ore and large quantities of conglomerate 

 ore lying as a fringe along the northern boundary of the ore field, and also 

 along the margins of the bottom lands bordering the various creeks and 

 bayous traversing the region. To the southward the ores of Harrison County 

 are mostly of the laminated variety, with a small quantity of nodular ore oc- 

 curring in places, particularly in the northern portion of the county, and 

 quantities of conglomerate are also found occupying a similar relation to the 

 bayous and creeks as they do in Cass County. 



Marion County, from its intermediate position between these two areas, 

 appears to be an area of transition between these two, and the ore beds of the 

 county, while tending to become more and more of a laminated nature, still 

 largely preponderate in favor of the nodular concretionary grade of ore. 



As evidenced from the tables of analyses appended to each of the ore areas 

 from which the specimens analyzed were obtained, the iron ores of Marion 

 County appear to be of very good grade. As a general thing, however, these 

 ores all contain a small percentage of sulphur and phosphorous. Out of 



