Silurian and Devonian

What is the geological range of the Acadian Orogeny?

Silurian and Devonian

What is the Acadian Orogeny?

Avalon collides and subducts into proto north america and closes the eastern iapetus ocean and creates the acadian mountains in the devonian

What Crinoid was the Silurian and Devonian era rich in?

brachiopods!

When was there a re-radiation?

after the ordovician extinction

What’s significant about plants in the Silurian?

they invade land

Why did the plants still depend on moisture-rich environments during this age?

theyre still spore plants

What was plant life like in the Silurian-Devonian?

vascular plants, small, first forests, mainly spore plants so moisture necessary

What’s significant for animals in the Silurian but mainly Devonian?

they expand to land

What’s the iconic animal that is one of the pioneers for land invasion?

Tiktaalik

What caused the mass extinction in the late Devonian?

mass glaciation from increased weathering and orogenies, as well as reduced atmospheric CO2