An eon (or aeon) is a term in Earth science for the longest periods of time. It describes a part of the Earth's existence lasting hundreds of millions to billions of years.. A geologic eon is part of Earth's existence, made up of a number of eras of different lengths. A geologic era is made up of two or more shorter times called geologic periods.A geologic period is, in turn made up of yet ...

Eon (geology) In general usage, an eon (sometimes spelled aeon) is a period of time arbitrarily designated by humans. Geologists refer to an eon as the largest subdivision of time on the geologic time scale. For example, the Phanerozoic Eon, which is about 550 million years long, covers the period of time during which animals with hard shells ...

Eón (iné názvy: eon, geologický eón, zastarano: aeon) je najvyššia (čiže najdlhšia) geochronologická jednotka (resp. druhá najvyššia v systémoch obsahujúcich aj jednotku nadeón).Eónu zodpovedá chronostratigrafická jednotka eonotem (iné názvy: eonotém, eonotéma).Jeden eón (resp. eonotem) - okrem hadaika - zahŕňa viacero ér (resp. eratemov).

Eon je u geologiji naziv za vrlo dugo vremensko razdoblje i najveća jedinica u geološkoj kronologiji.. Eon se sastoji od era, ere se dijele na periode, periodi su sastavljeni od epoha, a epohe od doba.Sada smo u eonu fanerozoiku, njegovoj eri kenozoiku, njenom periodu kvartaru, njegovoj epohi holocenu i njenom megalajanskom dobu. Fanerozoik traje već 540 milijuna …

Eon (geology) In general usage, an eon (sometimes spelled aeon) is a period of time arbitrarily designated by humans. Geologists refer to an eon as the largest subdivision of time on the geologic time scale. For example, the Phanerozoic Eon, which is about 550 million years long, covers the period of time during which animals with hard shells ...

Os geólogos se referem a um éon como a maior subdivisão de tempo na escala de tempo geológico. [1] Só é menor que um superéon (o único superéon é o Pré-Cambriano).A categoria imediatamente inferior é a era.. Apesar da proposta feita em 1957 de se definir éon como sendo uma unidade de tempo igual a um bilhão de anos (1 Ga), a ideia não foi aceita como sendo …

Geologic eon. A geologic eon is the largest unit of time for the geologic time scale (Figure 1). Geologic eons are also referred to as "eonothems" (the chronostratigraphic name) or simply "eons". Eons are hundreds, even thousands, of years in length. Eons are made up with shorter eras. Figure 1. The ICS Chronostratigraphic Chart.