A noted spike in ferns occurred after this event, which saw the collapse of ammonite food chains in the oceans, though 90% of bony fish survived it.
A noted spike in ferns occurred after this event, which saw the collapse of ammonite food chains in the oceans, though 90% of bony fish survived it. Luis and Walter Alvarez found a worldwide layer of iridium that supports one theory of this event, which may have started at the Chicxulub [CHIK-shoo-lub] (*) crater in the Yucatán. Birds and mammals were spared by, for 10 points, what event in which a large groups of reptiles were wiped out 65 million years ago?
A noted spike in ferns occurred after this event, which saw the collapse of ammonite food chains in the oceans, though 90% of bony fish survived it.
extinction of the dinosaurs [or asteroid killing the dinosaurs or Cretaceous-Tertiary event {or} K-T event or Cretaceous-Paleogene event or K-Pg event; accept logical equivalents]