A PRELIMINARY REPORT ON CLAYS OF FLORIDA 191


 Flood-plain clays are exposed on the bank of the Econlockhatchee River, seven and one-half miles east of Winter Park, on the property of P. A. J. Nelson. A section of this exposure is as follows:

 Section of Clay Strata on Econlockhatchee River on Nelson Property,
 East of Winter Park.' Feet.
 Sand, surface ..................................................... 3
 C lay, brow n, plastic ............................................... 2
 Clay, brow n, sandy ............................................... 3
 C lay, gray, jointed ................................................ 1
 San d .................................. .......................... ?

 This deposit is located about two miles from the Florida East Coast Railway. The heavy overburden and the thickness of the clay does not warrant commercial exploitation.
 Numerous lacustrine deposits are found in Orange County. One of these, suitable for common brick, is exposed on the west side of Lake Ola, but its distance from transportation renders it of doubtful commercial importance.
 A sample from city pit in the city of Orlando was tested by the United States Bureau of Standards in 1914 with the following results:'
 Physical Properties of Orlando City Clay (Bureau of Standards Sample No. 14).
 Plasticity.......................... Poor.
 W ater of plasticity................. 19.9 %
 Linear air shrinkage............... 2.55%
 Fire tests:
Temperature. Linear Shr. Porosity. Color.
 Per Cent. Per Cent.
 950'C. 0.56 36.1 Red.
 1020 36.4 Red.
 1050 34.6 Red.
 1080 35.2 Red.
 1100 35.3 Red.
 1110 0.41 Red.
 1140 35.2 Red.
 1170 35.8 Red.
 1200 35.6 Red.
 1230 0.58 35.3 Red.
 1260 36.4 Red.
 1290 36.0 Red.
 1320 0.56 35.2 Red.
 This clay is of no value for the manufacture of clay products.

 OSCEOLA COUNTY
 Osceola County lies in the southeastern edge of the Lake Region and is underlain by Pleistocene sands and marls. A few clays are inlSellards, E. H., Report on Tests for Paving Brick, Florida Geological Survey Press Bulletin No. 7, 1915.