104 Tuscaloosa Formation [302 



iron oxide pebbles have not been observed in the Tusca- 

 loosa. This is another feature which serves to distinguish 

 the Upper Cretaceous gravels from the more recent terrace 

 gravels in this part of the Embayment Region, even though 

 the latter may rest directly on the former as is frequently the 

 case in the Western Tennessee Valley. 



South of McEwen, as stated above, the isolated Tuscaloosa 

 gravel areas may be traced along the Highland Rim across 

 Lewis County into Wayne and Hardin Counties and farther 

 into Mississippi and Alabama where, they are overlain by 

 marine Eutaw deposits and consequently paleontologic evi- 

 dence may be obtained. 



The Tuscaloosa extends also north of McEwen. About 3 

 miles west of Canton in Trigg County, Kentucky, at a point 

 just east of where the Fulton and Nashville Highway crosses 

 the divide between the Tennessee and Cumberland Rivers is 

 an exposure of Upper Cretaceous which has not heretofore 

 been reported. The locality is about 7 miles each of the 

 Upper Cretaceous belt as shown by the Geological Map of 

 Kentucky. 4 At this locality the following section may be 

 observed : 



River Terrace, sandy clay and leached soil which 

 becomes thicker 14 mile to the 

 west where it contains thick beds 

 of ferruginous conglomerate. .0 12 ft. 



Eutaw, red micaceous sand containing 

 streaks and pellets of white clay 

 and remains of Halymenites ma- 

 jor Lesquereux 10% ft. 



Tuscaloosa, well rounded white chert pebbles 

 and cobbles. The base of the 

 Tuscaloosa was not exposed here 

 but Mississippian chert occurs in 

 place some distance below in the 

 hollow leading northward +31 ft. 



4 Sellier, L. M. " State Geological Map." Kentucky Geological 

 Survey, 1915. 



