Principles dating sedimentary rocks
The Archeozoic began between 4 and 5 billion years ago when the formation of the Earth was taking place.During this era, the earliest recorded rocks were formed.
According to popular science, after knowing the decay rate of various radioactive elements, it is possible to measure the age of any rock that contains such elements.
[NP] Scientists mapped the Milky Way in a more detailed, three-dimensional way and found it is denser than thought, with 50 percent more mass.
The findings were presented Monday [01/05/09] at the American Astronomical Society's convention in Long Beach, Calif." [Based on: News Services article (5.0 Billion - Archeozoic Era - "The Archeozoic [Ancient Life] Era is the earliest era known to man.
Finding such a large structure at this very early epoch can reveal important information about how the Universe evolved at this crucial stage.
[NP] JKCS041 is found at the cusp of when scientists think galaxy clusters can exist in the early Universe based on how long it should take for them to assemble.