Dating in saskatoon
He named it: The fossil was extraordinary because it was found in a rock formation up to 1.2 billion years old and appeared to be the oldest multicellular organism that was a recognizable eukaryote — the group of complex organisms that include plants, animals and fungi — rather than a colony of microbes living together."It is an extremely important fossil and has been quite controversial," said Andrew Roger, a molecular biologist at Dalhousie University who was not involved in the new study.
Roger researches the diversification of life more than a billion years ago and the evolutionary rise of complex organisms.
But the fact that its age could have been anywhere in a 500-million year span led to some controversy.
Some scientists' calculations based on DNA evidence suggested red algae couldn't have existed 1.2 billion years ago.
(Nick Butterfield/University of Cambridge)"It confirms that this fossil is really special," said Gibson, an earth sciences Ph D student at Mc Gill.
So Gibson and his supervisor, Galen Halverson, decided to use a relatively new technique called Rhenium-Osmium dating that works well in rocks containing a lot of organic carbon, like the shale that the fossils were sandwiched between in cliffs on Baffin Island where they had also been found.Officially established in 1945 as the Saskatchewan Archives Board, the name of the institution changed to the Provincial Archives of Saskatchewan on August 24, 2015.Our Permanent Collection provides a unique source of information highlighting Saskatchewan’s rich and varied history.Microscope images of the fossil Bangiomorpha pubescens show it closely resembles modern bangio red algae.The image on the left is the thallus or body of the algae. The bottom one contains some asexual spores, but sexual spores have also been found.