What is "intervals"

Usage examples of "intervals".

The accumulation of each great fossiliferous formation will be recognised as having depended on an unusual concurrence of circumstances, and the blank intervals between the successive stages as having been of vast duration.

Many cases could be given of the lower beds of a formation having been upraised, denuded, submerged, and then re-covered by the upper beds of the same formation,--facts, showing what wide, yet easily overlooked, intervals have occurred in its accumulation.

The frequent and great changes in the mineralogical composition of consecutive formations, generally implying great changes in the geography of the surrounding lands, whence the sediment has been derived, accords with the belief of vast intervals of time having elapsed between each formation.

We do not make due allowance for the enormous intervals of time, which have probably elapsed between our consecutive formations,--longer perhaps in some cases than the time required for the accumulation of each formation.

In other cases we have the plainest evidence in great fossilised trees, still standing upright as they grew, of many long intervals of time and changes of level during the process of deposition, which would never even have been suspected, had not the trees chanced to have been preserved: thus, Messrs.

On the other hand, I do believe that natural selection will always act very slowly, often only at long intervals of time, and generally on only a very few of the inhabitants of the same region at the same time.

During these long and blank intervals I suppose that the inhabitants of each region underwent a considerable amount of modification and extinction, and that there was much migration from other parts of the world.

And far and wide as he might roam he always managed to turn up at frequent intervals, at ball and supper and theatre, in the gay Hauptstadt of the Habsburgs, haunting his favourite cafes and wine-vaults, skimming through his favourite news-sheets, greeting old acquaintances and friends, from ambassadors down to cobblers in the social scale.

Like sheep that feed greedily before the coming of a storm the starling-voices seemed impelled to extra effort by the knowledge of four imminent intervals of acting during which they would be hushed into constrained silence.

Also in evidence, at discreet intervals, were stray units of the Semetic tribe that nineteen centuries of European neglect had been unable to mislay.

On its further shore could be seen spread out at intervals other teeming villages, with their cultivated plots and pasture clearings, their moving dots which meant cattle and goats and dogs and children.

In our diagram the line of succession is broken at regular intervals by small numbered letters marking the successive forms which have become sufficiently distinct to be recorded as varieties.

But these breaks are imaginary, and might have been inserted anywhere, after intervals long enough to have allowed the accumulation of a considerable amount of divergent variation.

Let us take a simple case: in travelling from north to south over a continent, we generally meet at successive intervals with closely allied or representative species, evidently filling nearly the same place in the natural economy of the land.

Europe and the United States during these intervals existed as dry land, or as a submarine surface near land, on which sediment was not deposited, or again as the bed of an open and unfathomable sea.