It buckled, and strata—Time-sectors—were thrust up to mingle with others.
No fossils have been found in these strata and their age is uncertain.
The strata of sand with oyster-shells, and particularly a thick stratum of chalk, is found near Reading.
These strata are shewn in the diagram given at the head of this chapter.
No remains of plants have been found in Cambrian strata, except some doubtful markings, as of seaweed.
Many of these strata are full of such exuviae—the so-called "fossils."
Both of these strata eventually become the epiblast, of which they form the epidermic and nervous layers.
To identify these strata, it is necessary to call them by name.
And now, what will be the character of these strata, old and new?
It is further agreed that the Triassic strata were deposited after these.
"horizontal layer," 1590s, from Modern Latin stratum, special use of Latin stratum "thing spread out, coverlet, pavement," from neuter past participle of sternere "to spread out, lay down, stretch out," from PIE *stre-to- "to stretch, extend," from root *stere- "to spread, extend, stretch out" (see structure (n.)).
stratum stra·tum (strā'təm, strāt'əm)
n. pl. stra·tums or stra·ta (-tə)
A horizontal layer of material, especially one of several parallel layers arranged one on top of another.
Any of the layers of differentiated tissue forming an anatomical structure.