In the oldest rocks known to geologists—those of the Eozoic time—some indications of the presence of life are found.
The English chalk and the chalky modern mud of the Atlantic sea-bed, are precisely similar in origin to the Eozoic limestones.
Another problem is that of means of subsistence for the Eozoic Foraminifera.
In it the forms of animal and plant life that had been becoming more numerous and varied from the Eozoic onward, culminated.
Such a great movement unquestionably closed the Eozoic period of geology.
In his system the greater divisions of the history were “Times:” thus the Eozoic was a time and the Palozoic was a time.