GEOLOGY BETWEEN APALACHICOLA AND OCKLOCKNEE RIVERS. 49 
SECTION ON A. N. RAILWAY FROM MOSQUITO CREEK TO HARDAWAY. 
8. White incoherent sand and soil- 5 feet 
7. Red and mottled sands 10 feet 
6. Dark colored sandy clay, including layers of pink and purple clays 10 feet 
5. Covered in this section, or showing only reddish sands 45 feet 
4. Cross-bedded sands with white partings, including stratum of blue 
sticky clay 21 feet 
3. Covered, or showing only red sands 28 feet 
2. Alum Bluff formation, including fullers earth beds, gray marls 
weathering to greenish clays, containing silicified oysters, and 
light colored sandy marls (occasional exposures) 64 feet 
1. Light colored limestone rock, probably Chattahoochee formation 
tion (exposed at the base of this section) 
Many exposures of these red sands are found in and near 
Quincy. The following section is seen at the. public road crossing 
of the Seaboard Air Line railway 3 miles east of Quincy, a short 
distance west of mile post 186. The elevation at the base of this 
section is 220 feet above sea. 
5. Yellow soil with iron pebble concretions 1 3L2 feet 
4. Pink-colored sandy clay 1 3 feet 
3. Massive red sands 4^4 feet 
2. Red sands with white partings 5 feet 
1. Massive red sands - 4 A feet 
20 l / 2 feet 
At Quincy approximately 100 feet, consisting chiefly of sands 
and sandy clays, lie above the fullers earth. The contact between 
the Alum Bluff formation and this overlying material is concealed, 
or at least is not apparent. Good exposures are seen on the public 
road and on the branch line of the Seaboard Air Line railway run- 
ning to the fullers earth plant. In Leon county, east of this area, 
are many exposures which possibly should be referred to this 
formation, although they have heretofore been included with the 
Alum Bluff formation. These, exposures in Leon county have been 
described in the preceding report of this Survey, pp. 104-108, 1917. 
4 
