HARRISON COUNTY. 



135 



and orange-red sand at depths varying from five to twelve feet, and close to 

 the town of Marshall beds of laminated ore occur in broken and fragmen- 

 tary conditions at various depths beneath an orange-red sand. These beds, 

 however, are thin and of no practical value. 



Thinly scattered deposits of laminated ore m a broken condition or thinly 

 bedded are also found at other places throughout the county; but while some 

 of them may be of use, the greater proportion of these beds will be found of 

 no practical value, many of them being mere shells not exceeding two or 

 three inches in thickness. 



TABLE SHOWING ANALYSES OF LAMINATED IRON ORES FROM HARRISON COUNTY, TEXAS. 



No. 



Peroxide of 

 Iron. 



Silica. 

 Alumina. 



l 



1 



■g 



CO 



o . 



03 « 



Water and 



Loss on 

 Ignition. 



3 



o 

 H 



^ g 



747f. . 



749f.. 



750-f.. 



752*.. 



753f. . 



804f.. 



806f. 



807*. . 



808*. 



67.91 



61.22 



! 47.53 



i 64 03 



69.65 



64.90 



: 67.75 



44.07 



63 . 95 



11.60 

 15.15 

 35.65 

 16.70 

 13.20 

 26 70 



7.09 

 10.18 



6.37 

 10.77 



2.05 



70 





Trace. 



Trace. 



Trace. 



Trace. 



0.32 



0.08 



0.27 



Trace. 



0.56 



0.35 



1.14 



0.07 



0.26 



0.15 



0.12 



13.20 



13.50 

 9.90 

 7.90 



14.00 

 7.81 

 9.60 

 7.20 



14.20 



100.07 

 100.05 

 100.01 

 100 07 

 100.12 

 100.18 

 99.96 

 99.78 

 100.19 



47.53 

 42.85 



Trace. 

 Trace. 



Trace. 

 Trace. 

 Trace. 

 Trace. 



33.27 

 44.82 

 48.75 

 45 43 



16.80 

 39.70 

 13.40 



5.45 



8 33 



-8.30 



Trace. 

 Trace. 



Trace. 

 Trace. 

 Trace. 



0.10 

 0.33 

 0.22 



47.42 

 30.84 

 44.76 



Analyses made in the Laboratory of the Geological Survey of Texas by fL. E. Magnenat, *J. H. Herndon. 



Localities. 



No. 747. Hynson's Mountain. 



No. 749. E. Tally lieadright. 



No. 750. C. Grillet headright. 



No. 752. Six miles northwest of Marshall, near railway crossing. 



No. 753. J. B. Hall, C. Grillet headright. 



No. 804. Walnut Creek, near stand pipe of Marshall Water Works. 



No. 806. R. Hightower headright. 



No. 807. L. Watkins headright. 



No. 808. J. Decker headright. 



2. GEODE OR NODULAR CONCRETIONARY ORE. 



The occurrence of geode or nodular concretionary iron ore in Harrison 

 County is somewhat limited in extent, and although it is found scattered 

 more or less over the entire county, it does not appear to be developed to any 

 great extent upon the higher lands, but is almost exclusively confined to the 

 region of dark brown or red sands, and even there, is only sparingly de- 

 veloped. 



The nodular ore of Harrison County is usually found in small quantities 

 lying near the base of the higher central region and among the brown sands, 

 from which they appear to have been washed out by the extensive erosion 

 going on within the area of their occurrence. 



