106 
FLORIDA STATE) GEOLOGICAL SURVEY. 
In addition to the localities previously mentioned, there are ex¬ 
posures of the Shoal River marl member at various localities in Wal¬ 
ton County. This member outcrops in the valleys on the west side of 
the Choctawhatchee River in the vicinity of Knoxhill, and westward 
in the vicinity of Eucheanna. It is also reported southwest of 
DeFuniak Springs. A well on the farm of Mr. Neil Campbell near 
Knoxhill penetrated the following beds: 
Yellow sandy clay... 16 feet- 
Blue shell marl (Shoal River) ..... 12 feet. 
White micaceous sand with many shell and some sharks’ teeth (Oak 
Grove ?) . ..... 8 feet. 
Total.. . 36 feet. 
Fossils obtained at a depth of thirty-three feet from Mr. Dave 
George’s well, nine miles southeast of De Funiak Springs, seem to 
show the presence of the marls belonging to the Shoal River member; 
and what is probably the same marl is exposed on Folks Creek one 
and a half miles southwest of Dave George’s house. The Shoal River 
marl member was discovered in digging a mill race, about one mile 
east of Argyle. At this locality, the following section was measured: 1 
Yellow sand and gravel ... 2 or 3 feet. 
Yellow sand and clay. 2 feet. 
Blue fo.ssiliferous marl... 3 feet. 
MIOCENE. 
General Remarks:—The first account of Miocene rocks in Florida 
was published in 1881, when Dr. Smith 2 made known the results of 
his investigations carried on in connection with the statistical work 
for the Tenth Census of the United States. Dr. Smith’s original Mio¬ 
cene locality is at Rock Spring in Orange County, where he collected 
a series of fossils from an exposure of soft limestone. These fossils 
were identified by Heilprin as Miocene. Dr. Smith did not make any 
attempt to correlate the Miocene at Rock Springs with that at any 
other locality nor did he give the beds a local name. 
As already noted in the discussion of the Oligocene, the term Mio¬ 
cene was used for some time to designate all the rocks in this region 
belonging stratigraphically between the Vicksburg group (then called 
Eocene) and the known Pliocene and Quaternary. During that period 
the Apalachicola group (Upper Oligocene) was known as the “Old 
or Sub-tropical Miocene,” and the true Miocene was discriminated by 
1 Vaughan, T. Wayland. Unpublished notes. 
2 Smith, E. A., On the Geology of Florida. Amer. Jour. Sci., 3rd ser., vol. 
xxi, pp. 302-303. 
