116 FLORIDA GEOLOGICAL SURVEY-15TH ANNUAL REPORT 

portions of Escambia and Santa Rosa counties in the western extremity of the State. It is in most places overlain by Pleistocene deposits. An exposure which may be regarded as typical of the Floridian areas is seen at Dexland Bluff on the Escambia River east of Gonzales (see Fig. 10). The lower half of this section consists of interbedded gray, pink, buff and white micaceous clays intercalated with thin lentils of yellowish sand. This lower half is the Citronelle formation and is separated by an erosional unconformity as well as lithologically from the Pleistocene above. The Pleistocene consists of yellow and brown cross-bedded sands with some silt. Similar exposures exhibiting the same features may be seen at Gull Point, Red Bluff, and at Magnolia Bluff on Escambia Bay east of the city of Pensacola.
 The clay deposits now being worked at Quintette and Molino are probably Citronelle. These are gray to brown in color, dense, and highly plastic. In the vicinity of Pensacola the Citronelle clays are thin and variable in lateral extent being interbedded, and even cross-bedded, with sands. These clays have been formerly used for stoneware in a pottery in Pensacola and are now being used in a pottery in St. Petersburg.
 Citronelle clays are also exposed at several points northwest of Pensacola, near Muscogee and along the Perdido River.
 Berry' says the physiography and vegetation during the deposition of the Citronelle sediments may be compared with that of the present time along the east coast of Florida north of latitude 28 degrees, or along the Gulf coast west of the Ocklocknee River. He says: "We may picture a more or less straight series of barrier beaches, probably with active sand dunes, a mile or more in width, and broken in places by inlets. Back of these beaches there were wide lagoons, of variable width, perhaps not less than a mile and certainly reaching a much greater width where some river expanded into a broad estuary, with its shallow and muddy bayous. The water in the lagoons varied from fresh to salt according to the presence or absence of inlets and the positions of the rivers."
 The Lafayette formation (Pliocene) is not known definitely to exist in Florida, but some of the sands and clays of north and west Florida may represent this formation.
 The beds of recognized Pleistocene age are the Fort Thompson Beds, Lostmans River Limestone, Key West Limestone, Key Largo

 lBerry, E. W., The Flora of the Citronelle Formation, U. S. Geol. Survey Prof. Paper 96, p. 194, 1917.