118 
FLORIDA STAFF GEOLOGICAL SURVEY. 
670 feet from surface. 1 
Conus pygmaeus Reeve. Neverita duplicata Say. 
Cancellaria smithii Dali var. Area idonea Say. 
Astyris profundi Dali var. Cardium laqueatum Conrad. 
Geologic Horizon:—Fossils mixed, Miocene represented. 
890 feet from surface. 2 3 
Natica sp. (fragment). Venus large sp. (fragments). 
Cardium laqueatum Conrad. 
Geologic Horizon:—Miocene fossils present. 
Dr. Vaughan identified the fossils listed above and his conclusions 
which are given below serve to indicate that the only value to be at¬ 
tached to this record is the presence of Miocene marls. 
Additional Remarks: — “This record is entirely untrustworthy. 
Fossils from above have apparently tumbled down into the bore hole, 
and probably those from three horizons are commingled. Further¬ 
more, the indicated thickness of the Miocene is suspiciously great.” 
.Bluish green shell marl was reported on the east bank of Holmes 
Creek four miles south of Vernon and similar material was encount¬ 
ered in a well at Miller’s Ferry beneath twenty feet of sand and clay. 
The Choctawhatchee marl was observed by Dali, Foerste, Vaughan 
and others at various places on the Chipola, Apalachicola and Ock- 
locknee Rivers. The sections recorded by Dali 1 on the Chipola River 
are as follows: 
The section here was measured with a steel tapeline on the left bank of the 
Chipola River, Calhoun County, Florida, at the bluff about 200 feet north of the 
spring, which here flows from a wooden pipe. 
Section at Abes Spring. 
1. Superficial sands, about. .. 4 feet. 
2. Reddish and yellowish streaked sands . 30-32 feet. 
3. Gray aluminous clay • •.• •. 19 feet. 
4. Chesapeake gray marl to water (variable). 7 feet. 
Total thickness above water ..... 62 feet. 
In detail these strata have the following composition: 
Number 1.—Pale, yellowish gray, incoherent sand, such as might be deposited 
by a river during seasons of high water, less like beach-sand than the analogous 
material at Alum Bluff. 
1 Identified by T. Wayland Vaughan. 
2 Identified by T. Wayland Vaughan. 
3 Dali, Wm. H., and Stanley-Brown, Joseph. Cenozoic Geology along the 
Apalachicola River, Geol. Soc. Am., Bull. vol. v, 1894, pp. 160-161. 
