A PRELIMINARY REPORT ON CLAYS OE ELORIDA 
55 
CONTENTS page 
Introduction . 61-63 
Scope of Report... 61-62 
Field Work. 62-63 
Previous Work on Florida Clays.. . 63 
Acknowledgments. 63 
Chapter 1: 
General Geology of Clays. 64-68 
Definition . 64 
Origin . 65-66 
Geologic Types of Deposits . 66-68 
Residual Clays . 66-67 
Sedimentary Clays. 67-68 
Marine Clays . 68 
Flood-Plain Clays .. 68 
Lacustrine Clays . '... 68 
Glacial Clays . 68 
Aeolian Clays. 68 
Chapter 2: 
Classification of Clays . 69-71 
* Ries’s classification . 69-70 
Grout and Soper’s classification. 70 
Parmelee’s classification . 70-71 
Chapter 3: 
Mineralogy and Chemical Properties of Clays. 71-88 
Minerals in Unburned Clays. 71-77 
Kaolinite. 71-72 
Quartz . 72 
Feldspar . 73 
Mica . 73 
Hydromica .. ........... 73 
Limonite . 74 
Hematite. 74 
Magnetite...... 9 74 
Siderite . 74 
Pyrite . 74-75 
Calcite. 75 
Gypsum. 75-76 
Rutile. 76 
Ilmenite. 76 
Glauconite . 76 
Chlorite .. 76 
Dolomite . 77 
Hornblende . 77 
Garnet . 77 
Vivianite. 77 
Pyrolusite and Psilomelane . 77 
Minerals in Burned Clays. 78 
Chemical Analysis of Clays. 79-81 
Chemical Effect of Various Constituents in Clays. 81-88 
Silica . 81 
Alumina . 81 
Iron oxide . 81-82 
Lime. 82-83 
Magnesia . 84 
Alkalies . 84 
