il 



GEOLOGICAL EEPORT. 



1*112 



R. 7 E., and in dug wells on S. 33, T. 4, R. 9 E., on the heads of Little Brown's 

 Creek. Further S., however, as well in the middle of the belt, on Big Brown's 

 Creek, the character of the material changes more and more to that of the 

 common greenish micaceous sand, which further S. alone characterizes the 

 group. It is thus at Boyer's mill (about S. 27, T. 5, R. 7 E.), where the 

 material could hardly be distinguished from that of the Columbus bluff ; and at 

 Hare's mill on Big Brown's Creek, S. 10, T. 5, R. 8 E., where we obtain the 

 following section : 



(Sec. 8.) 



SECTION AT HARE'S MILL, BIG BROWN'S CREEK, TISHOMINGO CO. 



Ledge No. 1 of this section forms the bed of the creek here, and for some 

 distanco around the same appears in the branches. On S. 30, T. 4, R. 9 E., 

 about 4 miles N. E. of the locality just mentioned, on a very high ridge, we find 

 a ledge 18 inches thick, of black micaceous clay, containing cretaceous fossils, 

 underlaid by the non-effervescent sands of stratum No. 4 of the above section, 

 overlaid by 6 feet of reddish sandy clay, and blue sand. — The sand in question 

 forms the main mass of the ridge, and the section recalls to mind that given 

 above from Bell's contract (TI 109, Sec. 6). 



Sections similar to that at Hare's mill, frequently occur on the waters of Big 

 Brown's Creek, down to the Itawamba line, both in wells and on the bluffs of 

 streams, which very commonly flow on the indurate ledges of greenish 

 calcareous sand. On S. 8, T. 6, R. 8 E., a section of about CO feet occurs on a 

 washed hillside, where large blocks of the greenish micaceous sandstone are seen. 



112. On Okalilly Creek near Carrollville, S. 22, T. 6, R. 6 E., there is a bluff 

 30 feet high, the lowest 20 of which exhibit the cretaceous strata, to-wit : 6 

 feet of blue and yellowish, non-efFervescent, micaceous sand, forming the bed of 

 the creek, overlaid by about 14 feet of whitish calcareous strata stocked witij 



