PANOLA COUNTY. 243 



GRAND BLUFF DISTURBANCE. 



East of Beckville, on the eastern part of the Lagrone headright 7 near the 

 old Dixon place, in the Grand Bluff road, was seen evidence of an apparently 

 later disturbance, and as part of the iron series is involved it must have oc- 

 curred after its deposition. 



The red and gray mottled clay, its superimposed red clay, and the overly- 

 ing thin stratum (two inches) of iron sandstone have been displaced. Instead 

 of being horizontal, as when deposited, the series is now tilted and twisted, 

 having in some places a dip varying from fifty to ninety degrees. In addi- 

 tion to this, the iron sandstone in places has on one side distinct grooves, 

 which indicate great lateral pressure and simultaneous sliding motion. Sev 

 eral specimens of crusty and botryoidal limonite, which no doubt were the 

 local representative of the buff crumbly ore, were seen mixed up with the 

 disturbance. A few fragments of wavy laminated limonite were found, some 

 of which were still adhering to the thin iron sandstone, confirms the opinion. 



Returning to Beckville on the Grand Bluff and Harmony Hill road, two 

 miles northwest from Grand Bluff, on the W. N. Lee place, Antoine Duboise 

 head right, m the bed of Dillard Creek, a tributary of Martin's Creek, an 

 upturned outcrop of siliceous limestone was seen. Strike, east by north and 

 west by south. Dip about forty-five degrees, nearly south. 



At Grand Bluff, on the Sabine River, about a mile above the ferry, a fault 

 or slide involving the two beds of laminated and massive siliceous limestone 

 already described under "Fresh Water Siliceous Limestone" was seen. The 

 fault occurs at the mouth of a little ravine on the west side of the river, and 

 shows the laminated limestone out of place, the throw being about twenty 

 feet. This, in connection with the foregoing observations, has been named 

 "the Grand Bluff Disturbance," to distinguish between what appears to have 

 been a later without metamorphism and an earlier disturbance accompanied 

 with metamorphism as shown on Twoomey Creek. 



23— geol. 



