When was the Great Ordovician Biodiversification Event? (GOBE)?

[Daniel Fischer]

Hello, I have a question about the great ordivician biodiversification events (GOBE).

I know this series of events happened between the late cambrian and the late ordivician but are there more specific dates for it? For example like the great dying was about 250 million years ago.

I couldn't find anything more specific then late cambrian to late ordivician but if you know something more specific or you know that there isn't a more specific date please tell me, I would love to know!

[Tidgy's Dad]

There aren't specific dates for these sorts of events. 

Just general ones. The Great Ordovician Biodiversification Event (GOBE): definition, concept and duration - Servais - 2018 - Lethaia - Wiley Online Library

 

[Kane]

One great book of papers I read on this was The Great Ordovician Biodiversification Event edited by Webby, Parris et al. 

 

From said book, a helpful chart:

 

As Adam said above, it was not a single "event" in time, but a general expansion and diversification of fauna over a span of millions of years.