Two spongy-looking rocks

[Cari Anne]

Hi!  I found a few things while kayaking along the coast the other day (Pennsylvania, on Lake Erie).   They look spongy to me so I thought maybe they could be a fossil of some kind?

 

Item #1:  Approx. 2" x 3"

 

 

 

Item #2:  Approx.  3" x 4"

 

 

 

I have two other items to post but I can't fit them here, I will put in another post

 

Thanks!  ~ Cari

 

 

 

 

[DPS Ammonite]

It is a trace fossil from a burrowing organism. The burrows could have been made when the sediment was soft or could have been made by organisms boring into a hardened rock cobble on the ocean bottom.  

[Cari Anne]

Thank you DPS! 

 

Cari