I was reading a few days ago about the big asteroid that (according to many) "wiped out" the dinosaurs.
I read that if it had struck just a littler earlier or later on that same day, it would have landed somewhere else instead of smack where it landed in what is now the Gulf of Mexico, and it would not have been quite as "hard" on the dinosaurs. Because there was a lot of sulfur or sulfur mineral in the area where it hit and that caused a lot of sulfate droplets to linger for better than a year afterwards, high in the atmosphere, and reflect a lot of sunlight back into outer space, causing global temperatures to drop, suddenly and severely.
That would have happened even if it hit some other place on earth, but the place where it hit had an abundance of sulfur, so the global temperature drop that followed was even more severe.
According to whoever originated that report.
[This message has been edited by rinselberg (edited 06-22-2017).]