I emailed the museum and asked:
NosyNed writes:
To: info@tarpits.org
Subject: Info Request from Tar Pits Website -- re tour guide talks
Have you ever, at any time, in any way suggested that the dinosaurs were trapped in any tar pits anywhere? More, has anyone there ever suggested that tar pits had to do with the extinction of dinosaurs?
The response which I received:
museum writes:
We have never suggested that dinosaurs were trapped in tar pits or that such entrapment was a factor in causing the extinction of the dinosaurs.
Most of the known asphaltic fossiliferous deposits are of late Pleistocene age (i.e. the trapped animals were living 64 million years after the extinction of the dinosaurs.
I don't think there is any theoretical reason why there should not have been asphalt seeps during the Mesozoic Era (the Age of Dinosaurs) but I do not know of any.
None of the species (mammals, birds, reptiles, amphibians, fish, insects, mollusks, plants) that are known as fossils from asphaltic deposits became extinct by being trapped in tar.
Hope that helps!
You are, of course, wrong, WillowTree.