This rock weighing in at a hefty 2.5 kilo (shale ?) is completely surrounded by plant fossils that actually wrap around the rock itself. I.E. As to indicate that a pre-formed rock fell into the water and crushed the surrounding plants and caused them to fold around the surface while embeddeding itself in the environment that encourage fossil formation.
I really don't have a clue as to its makeup or origin (Above speculative).
It should should be noted that it was found on the ground surface after the flood where an adjacent embankment wall suffered severe weathering due to the flood of 2019.
Latitude: 45.5492085725
Longitude: -74.3639289159