Hi @tok-moon! This looks like the stem of some sort of tree fern, probably in the family Cyatheaceae. This is the family that most modern tree ferns belong to. The large, squiggly, semi-circles are leaf bases – regions on the stem where a leaf would attach. Although not true wood, these parts can be found in association with petrified wood. Most…[Read more]

Hi, @Tok-Moon. I don’t think this is a fossil, but a modern nautilus shell.

Hi, @Tok-Moon, can you add photos of the sides as well, with a scale bar?

Hi, @Tok-Moon. You can use https://macrostrat.org/map/#/z=1.5/x=16/y=23/bedrock/lines/ to figure out what age this is. This will help us further identify it. Also, could you add photos with a scale bar?