Even though the article was published late last week, I want to comment on this. There are several different theories about how dinosaurs went extinct. Gas-belching volcanos may have wiped out dinosaurs. The volcanos would have released a vast amount of sulfur and chlorine, releasing too much toxic.
Both dinosaurs and sea reptiles vanished But, why didn't other reptiles such as snakes, lizards, alligators, etc., go extinct too? The size of dinosaurs may be the factor. Mammals, birds, and other animals were small when king lizards were wiped out 65 million years ago.
I like the asteroid impacts theory more but I shall not close the door on the gas-belching volcanos theory. I think that it's important to look at all different theories. For further reading, click on the link below.
Gas-belching volcanoes may have killed dinosaurs