posted on Mar, 25 2013 @ 08:39 AM
Popular theory suggests that a massive asteroid smashed into Earth around 65 million years ago wiping most life, including the dinosaurs , off the
face of the earth. Now, scientists have found evidence of another planetary cataclysm that occurred some 135 million years before the
Cretaceous-Paleogene Extinction (CPE) event.
An examination of evidence across three continents has given scientists an indication that half of the Earth’s species disappeared 200 million years
ago due to gigantic volcanic eruptions. They suggest that the eruptions may have caused climate changes so sudden that many creatures were unable to
adapt, opening an avenue for dinosaurs to evolve and dominate the planet.
In recent times, science has suggested that atleast five known die-offs were caused in part by mega-volcanic eruptions followed by global climate
change . However, many of these events have not been dated accurately. The new study, however, has provided the tightest link yet to a mega volcanic
event, precisely dating the End- Triassic Extinction (ETE) event to 201,564,000 years ago, exactly at the same time a massive outpouring of lava
“This may not quench all the questions about the exact mechanism of the extinction itself. However, the coincidence in time with the volcanism is
pretty much ironclad,” said co author Paul Olsen, a geologist at Columbia University’s Lamont-Doherty Earth Observatory ( LDEO ) who has been
investigating the ETE boundary since the 1970s. Source -