PETROLEUM POSSIBILITIES OR FLORIDA 
73 
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THE CRETACEOUS SEDIMENTS 
The nearest Cretaceous sediments exposed at the surface are found in 
Alabama some 50 or 60 miles north of the Florida state line. These sedi¬ 
ments, the Ripley, Selma, and Eutaw formations of the Upper Cre¬ 
taceous and the Tuscaloosa formation of the Lower Cretaceous, dip 
toward the coast and presumably underlie the Tertiary sediments of 
west Florida. 
Of these formations, the Ripley and Eutaw in Alabama include chiefly 
calcareous sands and clays. Tire Tuscaloosa likewise is a formation 
consisting largely of sands with beds of clay. The Selma, on the con¬ 
trary, is chiefly a chalk formation with some clay. The Selma chalk, in 
Alabama, according to Smith, extends but a short distance east of Mont¬ 
gomery, and hence in eastern Alabama, north of the area under consid¬ 
eration in Florida, consists largely of calcareous sands and clays. 
WELL RECORDS 
A well was begun June 29, 1919, by the Chipley Oil Company about 
four miles south of Chipley as a test for oil. The exact location of this 
well is the NWJ4 of the NWJ4 of Sec. 27, T. 4 N., R. 13 W., and is 
near the locality known as Falling Water sink. Fortunately, a very 
complete and accurate record has been preserved, based on samples of 
the drillings taken at five-foot intervals, and these were submitted to the 
Florida Geological Survey for study through the courtesy of Mr. E. C. 
Butler. The well has a total depth of 4,912 feet, being abandoned at 
that depth on May 31, 1921. 
The successive formations penetrated in this well are scarcely to be 
recognized by the lithology of the formations and can be identified, if at 
all, apparently only by the minute fossils which have not yet been studied 
in detail. All data relating to the geologic succession of formations as 
revealed by a study of these samples will ultimately become available. 
EXTREME WEST FLORIDA-PENSACOLA AREA 
The part of the State here described as the Pensacola area includes . 
Escambia, Santa Rosa and Okaloosa Counties. In this area the surface 
formations include Miocene and later formations. The south and south¬ 
west dip observed in the formations of the Marianna-Chipley district 
