What is Stenian?
The '''Stenian''' is the last [[geology|geological]] [[Period (geology)|period]] in the [[Mesoproterozoic]]. It began 1.2 [[billion]] years ago, and ended at 1 billion years ago. Before it was the [[Ectasian]]. It is followed by the [[Tonian]]. The [[supercontinent]] [[Rodinia]] began forming in this period. [[Fossils]] of the first known sexually-reproducing [[eukaryotes]] are found at the end of the previous period in the [[Hunting Formation]] on [[Somerset Island]], [[Nunavut]], [[Canada]]. This period includes the '''Keweenawan Age''' at about 1100 mya.<ref>{{cite web|url=http://deepblue.lib.umich.edu/bitstream/2027.42/28843/1/0000678.pdf|title=Organic geochemical study of mineralization in the Keweenawan Nonesuch Formation at White Pine, Michigan|publisher=University of Michigan|accessdate=25 May 2013}}</ref> ==References== {{reflist}} {{Geologic history}} {{science-stub}} [[Category:Mesoproterozoic]]