Originally posted by xnibirux
Huge earthquakes and volcanic activity are not important, happen simultaneously, and are much more common events.
Rubbish.
The Mt Toba eruption nearly wiped out the human race.
Mt Toba Catastrophe Theory
Within the last three to five million years, after human and other ape lineages diverged from the hominid stem-line, the human line produced a variety of species, including Homo ergaster, Homo erectus, Homo neanderthalensis and possibly Homo floresiensis.
According to the Toba catastrophe theory a massive volcanic eruption severely reduced the human population. This may have occurred around 70,000–75,000 years ago when the Toba caldera in Indonesia underwent an eruption of category 8 (or "mega-colossal") on the Volcanic Explosivity Index. This released energy equivalent to about one gigaton of TNT, which is equivalent to one billion tonnes, and three thousand times greater than the 1980 eruption of Mount St. Helens. According to Ambrose, this reduced the average global temperature by 5 degrees Celsius for several years and may have triggered an ice age.
And there have been other important asteroid/meteorite impacts as well. You cant just pick and choose geological events to suit your argument.
www.southafrica.info
The meteorite, larger than Table Mountain, caused a thousand-megaton blast of energy. The impact would have vaporised about 70 cubic kilometres of rock - and may have increased the earth's oxygen levels to a degree that made the development of multicellular life possible.




