128 
FLORIDA STATR GEOLOGICAL SURVEY. 
mentioned to me by prospectors at Bartow who had visited that locality. Both 
these marl beds are likely to prove to be Pliocene. 
The oyster marl which occurs on Peace River about three miles 
above Arcadia has been correlated with the Caloosahatchee marl. 1 
Dali’s section is: 
1. Humus and white sand . 3-5 feet. 
2. Yellow sand (indurated) . 3 feet. 
3. Oyster marl (in part subaqueous) . 2-4 feet. 
Nos. 1 and 2 of this section are doubtless Pliocene. 
The “Arcadia marl,’’ which was considered by Dali to be slightly 
older than the Caloosahatchee marl, has the following section : 2 
1. Humus and white sand . XVz- 6 feet. 
2. Yellow sand ..... 6 -10 feet. 
3. Peace Creek bon.e bed, phosphatized rock with bones (about) .. 1 foot. 
4. Arcadia marl (yellowish sandy marl to water’s edge). 3 feet. 
_ (The same,, under water), about.,. 3-6 feet. 
The “Peace Creek bone bed” is probably to be correlated with the 
Alachua clay, and the first and second members of the section are 
doubtless Pleistocene. . 
NASHUA MARL. 
During the progress of the field work for this report, collections 
of fossils were obtained which indicate that Pliocene marls are ex¬ 
tensively developed in the valley of the St. Johns River, and a bed of 
similar marl near Daytona has been referred to the same period. 
These beds have certain faunal elements which distinguish them from 
the other Pliocene beds of Florida; and, hence, they are given a dis¬ 
tinct name. They are here designated the Nashua marl, from a lo¬ 
cality on the St. Johns River, where they are best exposed. Further 
study may result in uniting all of the marine Pliocene of Florida under 
a single name; but for the present it appears desirable to avoid hasty 
correlation by the use of local names for the beds of different localities, 
especially where conditions governing deposition appear to have been 
unlike. 
Stratigraphic Position:—The Nashua marl is thought to rest un- 
conformably upon the Miocene at DeLand ; but this opinion lacks con¬ 
firmation, as the collections from that locality have not been studied 
in sufficient detail to determine the exact age of the beds. At various 
1 Dali, Wm. H., Neocene of North America, U. S. Geol. Survey Bull. No. 84, 
1892, p. 132. 
2 Dali, Wm. H., Neocene of North America, U. S. Geol. ! Survey Pull. No. 84, 
1892, p. 131. 
