A ii<1,i IM INA R\Y\ RI"PO<RT ON CLAN'S OV VLrORIDA 223












 ; 7







 Fic. 41-Filter presses, Edgair Plastic Kaolin Co., Edgir, Putnanm CoL1nt).

for Florida and tbc coastal plain regions, as is generally believe ed to have been the case durin T101ertilary times, then the feldspar would have become completely decomposedd long before it could have been transported from the crystalline area on the north to the sedimentary, kaolin region, several hundred miles southward. There is no evidence to indicate that the crystallin 'e areas have within late Tertiary times been at a much greater elevation than at present to facilitate rapid transportation. For this hypothesis to be workable, rapid transportation of tile feldspar material would be necessary in order to avoid decomposition before final deposition.
 Moreover, under Sellards' hypothesis one would expect to find pebbles or fragments of tlndecomposed feldspar present in the formation, as well as fragments of only partially altered feldspar. None have so far been reported. The clay.Nwould also be present in small lumps instead of the finely divided state in which it is found. In the alteration of feldspar to kaolinite free silica is one of the resulting products. If it is assumiled that tllis silica took tile formn of quartz then it would be difficult to account for thle rounided and water-worn conditions of the quartz grains present. No other form of silica, as opal, is found in or associated with the clay-bearing formation.