LIMESTONES OF WESTERN TENNESSEE 567 



referred to the Lego bed. The Dixon bed is 421^ feet thick. 

 It consists chiefly of red, clayey rock, but contains also layers 

 of whiter rock. It is overlaid by the layer of white clay, i^ 

 feet thick, forming the base of the Brownsport bed. 



About a quarter of a mile southeast of Cerro Gordo, at the 

 Cave Spring on the road to Savannah, the upper part of the 

 Lego limestone, 28 feet thick, is exposed above the spring. 

 Along the road leading up hill there is red clayey rock, 35 feet 

 thick, referred to the Dixon bed. At the Landing at Cerro 

 Gordo the white clay layer at the base of the Brownsport bed is 

 underlaid by a layer of massive, indurated clay, 2 feet thick, 

 and this, in turn, by a section 26 feet thick, red and clayey at 

 the top, less red and clayey below, consisting near the base of 

 fairly solid limestone. Beneath this is whitish limestone, 42 

 feet thick. It is difificult to determine where to draw the line 

 between the Dixon and the Lego bed. 



On Horse Creek, about a quarter of a mile below the Paulk 

 or Watson mill, at a cave locally well known, there is a section 

 of red clay and limestone, 34 feet thick, which may belong to the 

 Dixon bed. The top of this section is exposed at water's edge 

 at the mill. As in the case of the section at the Cerro Gordo 

 landing, there is only a general resemblance to the Dixon bed. 



A lithologically more typical exposure of the Dixon red clay 

 rock is seen at the Sulphur Spring on the Ike Ross and Arnold 

 place, about a mile above Dodd's mill. Here the Dixon bed is 

 35 feet thick. It is overlaid by the white clay layer forming the 

 base of the Brownsport bed, and underlaid by white limestone, 5 

 feet thick, forming the top of the Lego bed. 



The Dixon bed is exposed about half a mile north of Martin's 

 mill, on the northern bank of Indian Creek, directly opposite the 

 site of the old Craven mill. It here consists of about 44 feet of 

 reddish clay and clayey limestone, overlaid by the white clay 

 layer forming the base of the Brownsport bed. The top of the 

 Lego limestone is well exposed about a mile down stream. 



At the Webb or Rise mill, ly^, miles south of Linden, reddish 

 rock about ii feet thick, forms the base of the section. It may 

 belong to the top of the Dixon bed. 



