The trace fossil, which is not of an actual organism but rather evidence of its behaviour, was seen at a stop about half way to Quebec City. I don't want to give away the exact location since we hid the fossil around the outcrop for future groups of students to use when they visit. The fossil is called Rusophycus and is a trilobite resting trace. Trilobites were a very common, bottom-dwelling organism during the Ordovician, which ran from 488-443 million years ago. Sometimes, the trilobites, which had a hard exoskelton would dig themselves little holes, presumably to rest in, and these are preserved today as deep indentations in the rock that were then filled by mud and preserved.
Cheers and thanks for reading!
|A superb Rusophycus trace fossil in limestone. (Photo: Matt Herod)|
|Trilobites (Source: Wikimedia Commons)|