What is "layerings"

Usage examples of "layerings".

Below the first couple of feet of surface, the layerings and grain alignments are characteristic of cementing by finer binding particles under the action of fluids, not wind deposition.

Often her efforts took on a strangely surreal quality, as if she wandered back and forth through time as well as space, crossing and recrossing the myriad layerings of the universe on some curious quest whose meaning she only vaguely understood.

I research in the depth of old holographs and contemplate the layerings of ancient galaxies.

Some unknown length of time later--it couldn’t have been longer than five or ten minutes, I suppose, but it seemed like forever--I saw the bridge through layerings of leaves and firs.