Mesoarchean

From Freepedia

Mesoarchean era

(millions of years ago)

<timeline> ImageSize = width:175 height:355 PlotArea = left:40 right:5 bottom:105 top:45 AlignBars = justify

Period = from:2700 till:3250 TimeAxis = orientation:vertical ScaleMajor = unit:year increment:100 start:2700 ScaleMinor = unit:year increment:25 start:2700

Colors =

 id:eon  value:rgb(1,0.7,1)  legend:Archaean_eon  # light purple
 id:era  value:rgb(1,1,0.7)  legend:Mesoarchean_era   # light yellow
 id:period  value:rgb(1,0.7,0.7)  legend:Period  # light red
 id:black  value:black

Legend = left:15 top:60

BarData =

 bar:eon
 bar:era
 bar:period

PlotData=

 width:80 align:center textcolor:black mark:(line,black)

 bar:eon color:eon

 from:start  till:end  width:100  mark:none
 at:2750  mark:none  text:Archaean~(2500-3800)

 bar:era color:era

 from:2800  till:3200  text:Mesoarchean~(2800-3200)

 bar:period color:period

TextData =

 tabs:(25-left)

 pos:(15,350)
 text:"Preceded by:"
 text:^Paleoarchean era

 pos:(15,95)
 text:"Followed by:"
 text:^Neoarchean era

</timeline> (expand)

The Mesoarchean is a geologic era within the Archean, spanning 3200 Ma to 2800 Ma (million years ago). The period is defined chronometrically and is not referenced to a specific level in a rock section on Earth. Fossils from Australia show that stromatolites have lived on earth since the Mesoarchean.