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,__ ,___,_., _ _ , _,_,__ ,__, Cl Introduction 1 Stratigraphic outline 2 Upper Cretaceous Series_,_ ,, _,_ 2 Tertiary System 5 Mineralogic analysis methods 6 Ball clay deposits 8 Bentonite deposits,,,,_,_,_,,, , 12 Bentonite occurrences in Texas_ H Conclusions 15 References cited 20

Ball clay and bentonite deposits of the central and western Gulf of Mexico Coastal Plain, United States