264 



THE IRON ORE DISTRICT OF EAST TEXAS. 



2 feet. 



1. Red clay, with overlying scattered iron gravel 8 feet. 



2. Orange loam 6 feet. 



3. Sand bed 15 feet. 



4. Lighter orange yellow loam 6 feet. 



5. Mottled red and gray clay . 5 feet. 



6. Oray clay to bed of creek. 



At Millville Postoffice, on the northern slope of the hillside, is the follow- 

 Eocene? section: 



Sandy soil 



Hard stratum of fossiliferous iron sandstone containing Cardita planicosta. 



Turritella sp. ind 



Orange sand, typical (see analysis) 



Red clay, with overlying scattered iron pebbles and iron gravel, some of 



which are magnetic 



Mottled red and gray clay 



Under bed of orange loam 



Washed soil, from all the above, to bed of creek 



At the chalybeate spring (so-called Sulphur Spring), eighteen miles south- 

 east of Henderson, is a fault showing disturbance. The following is the 

 section : 



A. Reddish sandy clay soil 5 feet. 



B. Local pebble drift 2 feet. 



1 



2£ inches- 



10 feet. 



8 feet. 



6 feet. 



5 feet. 



3 feet. 



C. Clay 



foot. 



D. Lignitic micaceous clay shale to bed of creek .... 3 feet, 



A section seventy feet further up the stream shows the following: 



A. Red sandy clay soil , 5 feet. 



I. Clay 4 feet. 



F. Local drift pebbles of iron clay stone to bed of branch 4 feet. 



Another section fifty feet further north shows the following: 



A . Reddish sandy clay soil 5 feet. 



.1 . Yellowish sandy clay , 8 feet. 



K. Gray sand, with interstratified crusts of ferruginated shale, to bed x>f branch. . 5 feet. 



jb c jd t A r j a J K A •? 



Fig. 21. 



SECTION AT SULPHUR SPRING. RUSK COUNTY. 



A. Reddish soil 5 feet. 



B. Pebbles, drift 2 feet 



C. Clay ] foot. 



D. Micaceous sandy shale (lignitic series). 



E. Conglomerate bowlders. 

 G. Fault in sandy shale. 

 11. Hard gray sand. 



