Time runs left (older) → right (younger) · Hover a card for details
Earliest Cambrian; first skeletal animals; small shelly fauna (538.8-521 Ma).
538.80 Ma – 521.00 Ma · 17.80 Ma duration
Axis labels in Ma (millions of years ago) · Click a card for details
Earth › Phanerozoic › Paleozoic › Cambrian