Definitions
from The Century Dictionary.
- Of or pertaining to the oldest fossiliferous rocks, such as the Laurentian and Huronian of Canada, from the supposition that they contain the first or earliest traces of animal life; paleozoic.
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Geol.) Of or pertaining to rocks or strata older than the Paleozoic, in many of which the eozoön has been found.
Etymologies
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Examples
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For this many proofs are still lacking, even if we set aside the fact that the oldest organisms of every family (except the vertebrates and plants) are highly organized, inasmuch as their oldest progenitors may have been made unrecognizable by the metamorphosis of the earliest rocks and thus withdrawn from our observation; and even if the enormous length of time required for the development of forms so highly specialized as the trilobite, does not seem to be sufficiently represented in the eozoic sediments.
The Catholic Encyclopedia, Volume 11: New Mexico-Philip 1840-1916 1913
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