I came across the following vertebra washed up on a beach in Northern California. Is anyone able to identify it with some explanation? I had a tough time finding anything similar on Google. Is it a thoracic piece with rib facets?

Thank you for any information!

Post's pictures

20160511_172729.jpg, 1.65 mb, 2000 x 1125

20160511_172803.jpg, 1.9 mb, 2000 x 1125

20160511_173004.jpg, 1.72 mb, 2000 x 1125

Hi Phillip,

this looks to me more like the axis, or second cervical, vertebra. I think it may be from a large male Sealion or possibly a female Elephant seal, but I don't have the necessary comparative material to check.