CRETACEOUS FORMATION. 93 



are many exposures of the clays of this formation in 

 <the gullies facing the river bottom. In one of these 

 gullies the section is as follows : 



Section in Tuscaloosa. 



1. Pebbles, sand, and red loam of the Lafayette 



forming the plateau on which the city of 

 Tuscaloosa stands 15 feet 



2. Light gray, somewhat massive clays, mottled 



with yellow, but becoming laminated below 3 " 



3. Dark blue, nearly black laminated clays, lam- 



inae half an inch thick, separated by thin 

 partings of white sand. The clay contains 

 leaf impressions 3 " 



4. Yellowish gray laminated clays, also containing 



impressions of variable thickness, average 2 " 



5. Strongly cross-bedded sands, yellowish to 



white, sharp, with a few streaks of clay ir- 

 regularly distributed through it 20 " 



At the proper depth below the surface, the clays 

 above mentioned are encountered in most parts of the 

 plain, though naturally the -thickness of the beds and 

 their character vary from place to place. 



Eastward from the city the cuts of the A. G. S. rail- 

 road exposes these clays at numerous) points. Some 

 four miles from town they have been utilized 1 by Mr. 

 Harvey Cribbs in the manufacture of flower vases, 

 jugs and similar wares. Below about twenty feet of 

 the surface red loam and pebbles, we find at this place 

 one to twelve feet of white clay, free from streaks; 

 then -fhree feet of yellow sand and a bed of blue clay 

 of undetermined thickness.* 



D. Eies' analysis and tests of the Cribbs' clays are 

 given below under No. 1, S., where it is classed among 

 the pottery clays. 



At the Box Spring, about five miles east of Tusca- 

 loosa, the railroad cuts expose about six or eight feet 

 of laminated gray clays marked with purple streaks. 

 Beyond Cottondale, nine miles from Tuscaloosa, 



*Notes of Dr. George Little. x 



