Please Help ID

[Mari Honstead]

My granddaughter is in 4-H Geology and has found these two items and no one has been able to ID either one.

 

She found both items at a local sand pit. The first one was in one piece until she accidently dropped it. When it landed it broke open and the white areas were inside. One side feels kind of chalky and the other is feels pretty smooth but has ridges.

 

Any help would be greatly appreciated as she is trying to get her exhibit box ready for the Fair.

Thank you,

Mari

[Kane]

It is quite possible that the first one might be fossilized coral, such as a tabulate/colonial variety.

 

The second one appears to be banded and geologic, so not a fossil. 

[Miocene_Mason]

I agree

[TqB]

The first one looks like a rudist.

[M Harvey]

The first one is a fossil.  Maybe a clam.  Can you submit a photo of the two halves together and a pic of the cross section of the broken end.  That would be helpful.  

The second one looks like a metamorphic rock.

[ynot]

Welcome to TFF!

Agree with coral and geologic.

[Kane]

2 minutes ago, M Harvey said:

The first one is a fossil.  Maybe a clam.  Can you submit a photo of the two halves together and a pic of the cross section of the broken end.  That would be helpful.  

The second one looks like a metamorphic rock.

I'm not getting a clam vibe from this one. I've indicated the two areas that are suggestive of coral:

[TqB]

11 minutes ago, Kane said:

I'm not getting a clam vibe from this one. I've indicated the two areas that are suggestive of coral:

 

I'm still leaning towards rudist, doesn't really look like a coral there. Not completely sure though.

[Taogan]

I don't see clear septa, I tend towards Rudist as well. 

[abyssunder]

How big is the first specimen? I could see it as a  partial mammoth molar with possibly two plates.

 

[Herb]

I agree with abbysunder on the Mammoth and a rock on the other.

[Kane]

A mammoth tooth would be very exciting. Good eye, @abyssunder!

[TqB]

45 minutes ago, abyssunder said:

How big is the first specimen? I could see it as a  partial mammoth molar with possibly two plates.

 

 

 

That's a good possibility, and fits with it being from a sand pit. 

[Harry Pristis]

Definitely mammoth.  The white material is cementum which binds the enamel plates together.

 

 

[izak_]

Congrats on the mammoth! 

[Mari Honstead]

Here are additional pictures as requested.  It measures 2.5" by 4". Thank you all so very much for taking time to help us and for all of your information. 

[Shellseeker]

Isn't that Great?  You and your daughter have a large chunk of the tooth of one of these fantastic animals.  Reaching across the ages..

[Mari Honstead]

Here are additional pictures as requested.  It measures 2.5" by 4". Thank you all so very much for taking time to help us and for all of your information. 

Thank you. It is pretty fantastic. She is 9 and is so excited I don't think she'll get much sleep tonight.