PNW beach find, curved vertebrae, unknown

[WAStatePugetLobe]

This was found between glacial and non glacial quaternary sediment.  Slightly north of Ocean shores, WA.  NOT on the beach, but where the forest meets the beach and erosion is occuring.

 

I brought this to the only fossil shop local to me and all they recommended bringing it to another shop hours away so trying my luck here!

 

You can see the vertebrae which after taking a soft brush to curves around in the shape of a I, the clearly visible vertebrae at top are the largest in with, however the length of each remains the same as the width lessens.  There are at least 9 vertebrae I can count.  The width starts at .25", there is 1" of vertebrae exposed prior to curving back up, 2" total exposed vertebrae.

 

Curious if where it starts curving are joints?  You see in pictures where it curves that specific block looks different from the rest.  

 

What is your best ID guess?  Thank you so much!!!

 

[Caaaleb]

A whale ear bone? I'm not sure about it being a vertebrae but maybe.

[Fossildude19]

@Boesse

[Mahnmut]

Hello  WAStatePugetLobe, welcome to the forum!

As far as I see it the round thing is a iron-rich concretion, maybe formed around a fossil. I think what looks like a spinal column may rather be a crinoid stem. but hard to tell, the detail is quite weathered.

Best regards,

J

[Myrmica]

I would vote for concretion.  And yes, there may have been something biological that formed the nucleus of the concretion but it is difficult to say what it was.  Most of the sedimentary rocks in that part of the coast are Cenozoic and, one or two localities aside, crinoids are unusual.  

[Boesse]

Not a vertebrate fossil, I don't see any bone here. I see something that looks vaguely segmented, but I'm not convinced that's fossilized either - looks like those are veins in the rock, not a shell of some kind.