I'll preface this with that fact that this was my first time fossil hunting so these are probably just be random rocks haha.
These were all found at Agate Beach, CA, where some petrified bone and shells are known to be found. Pencil is for scale
Hello again everyone. So my question here is whether this is a fossil, or some sedimentary layering non-fossil? I found this at low tide at "Agate Beach", Bolinas, Marin County. California.