About 50 to 100 million years.
Geologic Timescale
Precambrian Era.
Nothing, they're everywhere. Depending on where you live, almost all rocks were around during the last ice age, which was yesterday on the geologic timescale of rocks.
The Geological Society has this page, but there are few events mentioned: http://www.geosociety.org/science/timescale/There is an iPhone app for the Geologic Time Scale. And, the makers website has a demo with some of the facts illustrated: http://www.tasagraphicarts.com/geotimescale.htmlDandan@apps4education.com
The longest division of geologic time, containing two or more eras.Answer:Although usually taken to mean just a very long time, astronomy and geology use eon to mean a billion years.
Geologic Timescale
I dun noe checking for the same thing :D
Hundreds of millions of years
The oldest eon of geologic time is the Archaean Eon of the Precambrian period. The oldest rocks and fossils date from this time, about 3.8 to 2.5 billion years ago. (Prior to that, the Hadean Eon began with the formation of the Earth. No geologic record exists from the Hadean, during which the Earth cooled from its molten state.)
Mineral resources are considered non-renewable because their production by earth forces on a geologic timescale cannot keep up with their consumption by humans on a human timescale.
Eras
The longest in geological time is an Eon eg. Archeozoic Eon . Edit: there is also the supereon, which is usually composed of 2-3 eons.
The geologic time scale that represents the longest time span is the eon. It is a unit of time that is equal to a billion years.
precambrian times
Eons I believe. Hope that helped! =)
Precambrian Era.
the eoarchean era is a blah blah blah no one really cares hope this helps