Pleistocene Mammal Bone and Tooth?

[James Savage]

Hello everyone

Below are pics of two more items for help with ID.  These were found on a dredge spoil island that produces modern to Miocene era fossils.  I think both of these are from Ice Age era mammals.

 

The larger grey one has spongy texture and is very heavy dense.  It has a few lines running along the sides of it.  I don't see Schreger lines or bark like material on it.  I don't think it's a tusk, rostrum, or whale jaw bone but it looks like similar to those in appearance.

 

The other smaller brown one is likely a broken piece of proboscid tooth but I'm not sure which part of the tooth or if it may be mammoth, mastodon, or gompotherium.  I don't see enamel plates like in mammoth teeth present.  Maybe a part of an incisor/tusk?  It is much lighter/less dense than the larger one.  I've found a few of these before with this shape and apparent Schreger lines.

Thanks a bunch for looking

[CDiggs]

@Boesse, perhaps you'd be kind enough to tell me if I'm totally off base here as you're an expert and I most certainly am not, but; with the grooves running along it and general cross-section could the larger piece perhaps be a whale mandible fragment?

[jpc]

I do not see any bone or tooth texture or shape here.  I think they are rocks.  : (

 

[Brandy Cole]

The large gray piece looks similar to ironstone to me, but the smaller brown piece does have lines and irregularities that make me want a second look.

 

I wouldn't rule that one out. The striations almost look similar to petrified wood in certain views.

 

 

[CDiggs]

could have sworn on close inspection that the larger piece has the texture of cancellous bone but perhaps I'm wrong.