noun
Great American Interchange
Paleobiogeographic term for the faunal exchange between North and South America after the formation of the Isthmus of Panama.
アメリカ大陸間大交差は、約300万年前に始まったとされる。
The Great American Interchange is thought to have begun about 3 million years ago.
A Japanese calque of the English paleontological term 'Great American Interchange', composed of アメリカ (America), 大陸間 (intercontinental), 大 (great), and 交差 (interchange/crossing).