142 FLORIDA GEOLOGICAL SURVEY—I5TH ANNUAL REPORT 
Fig. 13. —Layer of limonite overlying cross-bedded sand. The sand is under¬ 
lain by clay. Barrineau Bros. Brick Co., Quintette, Escambia County. 
ferruginous sediments and in places they may mark the upper limit of 
a former ground water table. 
Chemical analyses of these clays are not available and therefore 
the iron content is not known, but if any is present, as is to be expected 
in clays associated with limonite, its coloring influence is surprisingly 
weak. Pink, cream, light buff and gray colors predominate and no typi¬ 
cal red-burning clays are found, except in the case of those in the vicinity 
of Molino which are not apparently associated with limonite. Mica is 
present in small amounts in practically all of the Escambia County clays 
observed. 
A sand-clay mantle, used locally for road material, overlies most 
of the county. Some of the clays are quite sandy and others are practi¬ 
cally free from sand. 
At Magnolia Bluff, Red Bluff and Gull Point, on Escambia Bay, and 
at Dexland Bluff on the Escambia River, several strata of clay are ex¬ 
posed which in their raw state are red, pink, or gray, but which have 
practically the same color and qualities when burned. Some of these 
strata are also exposed in a cut on the Gulf, Florida and Alabama 
Railroad about three miles east of Muscogee and near Eleven Mile 
Creek on the Pensacola and Alabama Railroad about eleven miles north¬ 
west of Pensacola. These clays range in thickness from a few inches to 
