CONTENTS. v 



Chapter IV. Physical Properties oe Clay — (Continued). page 



Air shrinkage, . . 91 



Fire shrinkage, 93 



Fusibility, 97 



Temperature of fusion, 99 



Determination of fusibility, 101 



Seger cones, 1 101 



Thermoelectric pyrometer, 106 



Texture, 107 



Color, 1 10 



Slaking, 112 



Specific gravity, 114 



PART ll.-THE STRATIGRAPHY OF THE NEW JERSEY CLAYS. 



Chapter V. The Post- Pleistocene Clays, 1 19-122 



Geological distribution of clays, 119 



Post-Pleistocene clays, 120 



Character, 120 



Location, 120 



Clay loams, 121 



Chapter VI. Pleistocene Clays, 123-135 



Glacial and aqueo-glacial clays, 124 



Origin, 124 



In the Hackensack valley, 124 



In the Lower Passaic valley, 128 



In the Upper Passaic basin, 128 



In other localities, 130 



Cape May clays, 130 



Origin, 130 



Localities, 131 



Pensauken clays, 133 



The Fish House clay, 133 



Fossils, 134 



The Bridgeton formation, 135 



Chapter VII. Clays in Tertiary Formations, 137-147 



The Beacon Hill and Cohansey formations, 137 



Definition of terms, 137 



Fossils, 138 



Clay deposits, 139 



Distribution, 139 



Character, 140 



The Shiloh marl, 141 



The Alloway clay, 142 



Occurrence, 142 



Character, 143 



The micaceous, talc-like clay, 144 



The fluffy sand, 144 



