Fossils in canada dating earth
The three million year Quaternary period, the time of recognizable humans, is too small to be visible at this scale.The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time.
Some scientists' calculations based on DNA evidence suggested red algae couldn't have existed 1.2 billion years ago.
A few years ago, Roger notes that he and some colleagues did their own molecular clock analysis that suggested plants emerged earlier than Gibson and his colleagues calculated.
"So it looks like there will be more debates about these things in the future! Gibson and Halverson's study was coauthored by researchers from Lawerence Berkeley National Laboratory in Berkeley, Calif., the California Institute of Technology, the University of Alberta, and the Geological Survey of Canada.
Working up there was a "dream come true" for Gibson: "It's a magical place I've wanted to go for a long time." For four summers, he and a small team helicoptered in to sites between Pond Inlet and Arctic Bay.
They camped on the tundra in lightweight tents at the tops of sea cliffs to avoid polar bears, then scrambled down to collect samples with simple rock hammers.