107 

 earlier Tertiary, the Eocene perhaps or perhaps in the Cretaceous 

 and that the so-called « hifusorial earth », for it is net mari and 

 does not contain lime in the major part but is clayey, or alumina, 

 and was formed before the Oligocene of California Infusorial earth 

 or day, as it is called, which comes from Monterey, Redondo Beach, 

 San Fedro and Crescent City. And the Infusorial Clay of the Great 

 Plain constitutes the bed of an extinct sea, the Occidental Sea. 



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