4048 x 2616 px | 34,3 x 22,1 cm | 13,5 x 8,7 inches | 300dpi
Aufnahmedatum:
30. Januar 2003
Weitere Informationen:
The Ordovician spans 41.6 million years from the end of the Cambrian Period 485.4 million years ago (Mya) to the start of the Silurian Period 443.8 Mya. In North America and Europe, the Ordovician was a time of shallow continental seas rich in life. Trilobites and brachiopods in particular were rich and diverse. Although solitary corals date back to at least the Cambrian, reef-forming corals appeared in the early Ordovician, corresponding to an increase in the stability of carbonate and thus a new abundance of calcifying animals. The first gnathostome (jawed fish) appeared in the Late Ordovician Epoch.
