The largest mass extinction in Earth's history occurred during the
a. Paleozoic Era
b. Cenozoic Era
c. Proterozoic Era
d. Mesozoic Era
2007-05-17 06:34:36 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
The first two answers are incorrect. The largest mass extinction took place ~250 million years ago at the end of the a. Paleozoic Era. It has been estimated (see, for example, Doug Erwin's 2006 book "Extinction") that 90% of species went extinct at this event.
2007-05-17 07:17:16 · answer #1 · answered by Fuller 3 · 2⤊ 0⤋
The answer is A. Paleozoic Era. Nearly 90% of all living things, plant and animal, in the sea and on land, went extinct.
2007-05-17 14:34:38 · answer #2 · answered by rockjock_2000 5 · 2⤊ 0⤋
In 65 million year time span the mass extinction of what was called the large Dinosaurs ended in the middle Triassic era. This was part of the Mesozoic epoch and included; Jurassic and Triassic time dates.
Spartawo...
2007-05-17 14:09:34 · answer #3 · answered by spartaworld.combat 6 · 0⤊ 2⤋
End of the Cretaceous (end of Mesozoic). 65 million years ago. Most of the dinosaurs were wiped out.
Then I have some messed up profs because they all taught Cretaceous.
2007-05-17 13:41:50 · answer #4 · answered by Lady Geologist 7 · 0⤊ 2⤋