First clubmosses, horsetails and ferns appear, as do the first seed-bearing plants (progymnosperms), first trees (the progymnosperm Archaeopteris), and first (wingless) insects. Strophomenid and atrypid brachiopods, rugose and tabulate corals, and crinoids are all abundant in the oceans. Goniatite ammonoids are plentiful, while squid-like coleoids arise. Trilobites and armoured agnaths decline, while jawed fishes (placoderms, lobe-finned and ray-finned fish, and early sharks) rule the seas. First amphibians still aquatic. "Old Red Continent" of Euramerica. Beginning of Acadian Orogeny for Anti-Atlas Mountains of North Africa, and Appalachian Mountains of North America, also the Antler, Variscan, and Tuhua Orogeny in New Zealand.
|Late Devonian extinction (concludes)||Mass Extinction Event||~375 - ~360 Ma||Global|
|Siljan impact||Impact Event||376.8 ± 1.7 Ma||Sweden|
|Variscan/Hercynian orogeny (concludes)||Orogeny||~400 - ~280 Ma||Europe/North America|
|Caledonian orogeny (concludes)||Orogeny||~505 - ~400 Ma||Europe|
Overview of geological time
List all geological events