II 2 FLORIDA GEOLOGICAL SURVEY ELEVENTH ANNUAL REPORT. 
Shell marl 14 36 
Shell marl and sand 18 54 
Limestone, soft, cream-colored, .with shell fragments 36 90 
Limestone, gray i 20 no 
Limestone, hard, gray and cream-colored 60 170 
Limestone, hard, light brown 39 209 
Limestone, hard, white to brown 21 230 
Limestone, hard, white to brown, porous- 20 250 
Limestone, soft, white, fossiliferous 14 264 
“From the samples obtained between 22 and 54 feet, Vaughan 
identified Pliocene fossils. In the sample obtained between 54 and 
70 feet, he identified Miocene shells. This indicates that both the 
Nashua and Choctawhatchee marls are present at DeLand, and 
gives some idea of their minimum thickness at that locality.” 
“Samples of marl from a well at DeLand were found by 
Vaughan to contain: Pecten (type of madisonius ) and Chione 
(type of cancellata ) . From the presence of the madisonius type of 
Pecten, the marl is believed to be Miocene.”* 
Following is a section at the marl pit owned by the city of 
DeLand, about one mile south of the city, made December 7, 1908, 
supplemented by a section made March 4, 1915, by Dr. E. Ft. Sel- 
lards, who kindly furnished them for this publication: 
5. Light colored incoherent sand 4 to 10 feet 
4. Sandy clay, yellow, drab and blue, in places containing oyster 
shell marl 6 to 10 feet 
3. Shell marl, very irregular top surface 2 to 4 feet 
2. Clay stratum with concretions 2 to 6 inches 
1. Shell marl with slightly irregular top surface 3^2 to 4 feet 
Dr. Sellards also furnished the following notes on the section : 
“The shell marl, No. 1 of this section, has a slightly irregular or 
undulating top surface, the variation in level amounting to as much 
as 6 inches vertical in 6 feet horizontal, possibly more, in places. 
The change from the shell marl to the clay stratum above is abrupt, 
and the largest concretions in the clay are found just above the 
marl. The clay stratum in turn passes gradually into the overlying 
shell marl.” 
“This shell marl, No. 3 of the section, has an extremely irregular 
* Matson and Sanford, Water Supply- Paper No. 319, p. 133, 1913. 
