Took this picture about a year ago. I was exploring the shoreline on Denman Island. Group I was with was calling me back to leave when I saw this between some boulders. Snapped a few pictures because I thought it looked interesting. Wasn't sure if this could be a fossil, or maybe a concretion? Didn't have time to measure or get any closer for better photos, but it was thicker than a forearm and around the same length.
Anyway, this is something I found online about the area if its useful.
"Upper Cretaceous Nanaimo Group of southwest British Columbia is a >4 km-thick succession consisting mostly of deep marine siliciclastics deposited directly on the Insular Superterrane. "
https://fossilhuntress.blogspot.com/2019/09/denman-island-concretion.html
Any help is appreciated, always interested in learning something new
Thanks,
Jenaya