# Was volcanic activity more prevalent when the dinosaurs roamed?

Popular film culture often depicts much volcanic activity during the time of the dinosaurs.

Assuming "time of the dinosaurs" as the Jurassic (200 million years ago) until the end of the Cretaceous (66 million years ago):

Are there any geological theories that support such an assumption?

• Good question, come to think of it - volcanism always seems to be a prevalent sub-theme in movies like this. – user889 Dec 10 '14 at 4:52
• This is spanning almost 150 million years. I'm confident that both active and quiescent times existed. It also depends on your location. Even today, someone living in Kamchatka may have a different idea about contemporary volcanic activity levels than someone living in London. Since actual volcanic activity today occurs in very specific locations, marked by hotspots and subduction zones, I assume this was similar back then as well. – Gimelist Dec 10 '14 at 6:32
• However, since the interior of the Earth was slightly hotter 200 million years ago, it could be that overall volcanic activity levels were slightly higher than they are today. Nonetheless, the common depiction of volcanoes with dinosaurs is mostly done for artistic reasons I believe. – Gimelist Dec 10 '14 at 6:36

The 5 LIP, though localized to a specific region each time, had a global impact on the climate and on the oceans, as seen on $\delta ^{13}C$ curves for instance, or during the different episodes of Oceanic Anoxic Events.