Many, many years

This time we are looking on the crossword clue for: Many, many years.
it’s A 16 letters crossword puzzle definition. See the possibilities below.

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Possible Answers: EON, AGES, EONS.

Last seen on: –The Washington Post Crossword – Aug 12 2020
LA Times Crossword 12 Aug 20, Wednesday
Universal Crossword – Jan 23 2019
LA Times Crossword 6 Nov 18, Tuesday
The Washington Post Crossword – Nov 6 2018

Random information on the term “EON”:

The geological time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time, and is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth’s history. The table of geologic time spans, presented here, agrees with the nomenclature, dates and standard color codes set forth by the International Commission on Stratigraphy.

Evidence from radiometric dating indicates that Earth is about 4.54 billion years old. The geology or deep time of Earth’s past has been organized into various units according to events which took place in each period. Different spans of time on the GTS are usually marked by changes in the composition of strata which correspond to those, and indicate major geological or paleontological events, such as mass extinctions. For example, the boundary between the Cretaceous period and the Paleogene period is defined by the Cretaceous–Paleogene extinction event, which marked the demise of the non-avian dinosaurs and many other groups of life. Older time spans, which predate the reliable fossil record (before the Proterozoic eon), are defined by their absolute age.

EON on Wikipedia