geologic time presents to the scientist one of the most difficult problems with which he has to deal.
The former is the one movement which runs ever in the same direction through all geologic time.
The great length of geologic time inferred from the slow change of species.
But for the lapse of geologic time in which man has so far lived, Yellowstone has cornered the world's geyser market.
There is a strong reason to believe that some such shiftings of sea level have occurred during the vast lapse of geologic time.
Upon the precession of the equinoxes they erect a fabric of retrograde chronology, and set a clock to geologic time.
The sun set behind wooded mountains, long wave-lines raised far back in geologic time.
The flowing landscapes of geologic time may be likened to a kinetoscopic panorama.
Even in the Archeozoic the rocks testify to a climate seemingly not greatly different from that of the average of geologic time.
But now the geologists admit that we have no rule for the measurement of geologic time.