142 FLORIDA CEOLOGIC.\L SURVEY-I5TH ANNUAL REPORT


















 FIG. 13.-Layer of liionite overly ing cross-bedded ba nd. The sand is underlain 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 typical 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 practically 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 exposed 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 northwest of Pensacola. These clays range in thickness from a few inches to