BOXD COUNTY. 131 



Ft. 



1. Red clay with some sand 10 



2. Beds of clay with some reddish sand, somewhat stratified, with bine sandy clay at bottom 30 



At Greenville the drift extends from the creek to the summit of the 

 hill, a distance of about 100 feet vertically ; on top there is a deep red 

 clay. The road washings disclose beds of coarse sand, pebbles and 

 bowlders. The washings on the hillside filter the sand very much, and 

 towards the bottom there are deposits of very fine clean sand. 



At John Hall's, three miles east of Greenville, there was found 

 in his well conglomerate masses of rounded drift pebbles, evidently 

 cemented together by the silicious matter in solution in the infiltrating 

 water. 1 noticed a fragment of magnesian limestone with many small 

 pebbles and some sand closely adhering to it. 



It is evident that over the whole of this part of the State, including 

 all of the counties I have examined, the suriace was formerly 50 to 100 

 feet higher than at present, the missing portion having been composed 

 of sands, clays, pebbles and bowlders ; that this continued until near 

 the close of the drift period ; that the Pleistocene sea still spread over 

 the country, with the exception of a few of the highest mounds ; that 

 the sea subsided at a rate sufficiently rapid to wear away most of the 

 upper clays and bear them away, leaving finer sands strewn along the 

 surface just as we see exemplified at present at the Greenville hill. 



Coal Measures. 



Outcrops are seen on Shoal creek, Locust Fork, Dry Pork and Lake 

 Pork. The total thickness in this county is about 220 feet, all belonging 

 to the upper series, from No. 26 to No. 53, and include about three coal 

 beds. The following is a general section of the Coal Measure rock in 

 Bond county. [Note. — the numbers used correspond to those used in 

 my general section in this and adjoining counties, see page 128, etseq.\ 



It. In 



No.26. Clayshale 8 



No.27. Dark shaly limestone 10 



So. 28. Coal, No. 12 3 



No. 29. Shale 13 



No. 30. Shale and limestone 8 



No. 31. Limestone 13 



No. 32. Blue and bituminous shale 4 



No.33. CoaLNo. 11 17 



No. 34. Mostly shale 39 



No. 35. Blue and bitnminons shale H 



No. 3ri. Galcareo-bituminous shale, fossils 2 



No.37. Coal, No.10 7 



No. 33. Fireclay 4 



No. 39. Sandy shale 3 



No. 40. Tutenmergel 2 



No. 41. Iron stone 1 



No. 42. Argillaceous shale and flattened ironstone noddles 20 



