bbx /babaxa/
|
more than billions years |
bbxb /babaxaba/
|
tens of billions years |
bbxbp /babaxabapa/
|
Archean Eon; origins of life and plate tectonics; 13.4 to 13.55 billion years; 4;000 Ma |
bbxbq /babaxabaca/
|
Proterozoic; 2;500 to 500 Ma |
bbxpr /babaxapara/
|
13 billions years |
bbxprs /babaxaparasa/
|
Phanerozoic; 500 Ma to present |
bbxprsv /babaxaparasava/
|
13.7 billions years |
bbxprsvx /babaxaparasavaxa/
|
13.79 billions years |
bbxprsvxw /babaxaparasavaxawa/
|
present day; 13.798 billions years |
Connected classes: |
⌕ bbYn
|
now; present time ↞ bbxprsvxw |
⌕ ias
|
eras [geochronology; stratigraphy] ↞ bbx |
⌕ rab
|
historical periods; times; epochs ↞ iasgh bbxprsvxw |