FearGod
Freedom Of Mind
You only read what you want, do you?
There used to be 2 eons, but now there are 4 eons. You are using outdated geochronology (or geological time scale).
The old Precambrian eon has been divided into 3 separate eons.
The Phanerozoic makes 4.
- Hadean
- Archean
- Proterozoic
And there are 2 geological time scales, which geologists used:
Where the geochronology uses eon, era, period, epoch, age and chron, chronostratigraphy uses the corresponding eonothem, erathem, system, series, stage and chronozone instead.
- Geochronology
- Chronostratigraphy
In both eon and eonthem, they exactly same names, and there are 4 of them:
- Hadean
- Archean
- Proterozoic
- Phanerozoic
You really should keep up to date on stratigraphy.
And in the Big Bang theory, there are lot more than 6 epochs. Eric J Chaisson only listed 6, but there are lot more going on than 6 epochs. There are dozen-and-half epochs.
Again, you really should read more than one (and current) source on the Big Bang model.
These are the earliest epochs after the Big Bang:
The following epochs are what are how matters were form, but before theformation of the 1st stars:
- Plank's epoch
- Grand Unification epoch
- Electroweak epoch
- Inflationary epoch
- Baryogenesis
- Electroweak Supersymmetry Breaking and Quark epoch (began about the same time).
- Hadron epoch
- Lepton epoch (1 to 10 seconds after the Big Bang)
- Photon epoch (duration from 10 seconds to 388,000 years after the Big Bang)
- Nucleosynthesis (last from 3 minutes to 20 minutes after BB; hydrogen and helium nuclei were formed into hydrogen ions and helium ions, with no electrons)
- Recombination (after 377,000, hydrogen and helium ions began capturing electrons, creating stable (neutral) atoms, hydrogen and helium elements.)
- Hydrogen Line (or Dark Ages)
- Structure Formation (hydrogen element began gathering together by gravity into small and large structures, this occurred before gravitational collapse cause the first stars.)
- Reionization
- Stellar Formation (first stars were called Population III; at the beginning, there were no element heavier than beryllium; they are stars with very low metallicity. Only after these Population III stars ended by supernovae, did heavier elements were introduced into the universe. Other Population III stars that were too massive to explode as supernovae, collapsed and formed into black holes.)
- Formation of galaxies (This didn't occur until after new stars were formed from Population III stars; these stars are listed as Population II stars.)
- Our solar system were formed 9 billion years later, from materials of past supernovae. Our sun is 3rd or 4th generation star, and grouped as one of Population I stars, stars with the highest metallicity.
As you can see there are more than 6 epochs, and Chaisson had only listed 6 epochs.
You missed the Vacuum epoch, that was before the singularity.