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Ralenka

ID rock inclusions

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Ralenka

Found this rock (upstate NY, Tompkins county).  Main rock seems to be shale, but what are the black inclusions in it? 
 

The rock on the last picture is different. Is that print from an organism, or just a rock structure?

 

Thanks!

65A274E7-DA07-46A0-A7C5-8AC611DE53D9.jpeg

A3863F2A-C19F-428A-8CAB-C36371C2415A.jpeg

AC02EA28-48B1-42BC-BDD2-F48F42F08F42.jpeg

F5C33B3A-8FD3-42D8-B205-796A0283FC52.jpeg

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Ralenka

Thanks!

Feeling like I need a hammer :) but the rocks are very hard and I am not sure how to approach it without destroying the fossil.

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Fossildude19
3 hours ago, Ralenka said:

Thanks!

Feeling like I need a hammer :) but the rocks are very hard and I am not sure how to approach it without destroying the fossil.

Sometimes, it is better to collect by photograph. ;) 

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Ralenka
On 6/2/2020 at 4:39 PM, Fossildude19 said:

Mostly chert nodules in limestone. 

Are these chert nodules worth exploring? I read that because of their composition they are excellent fossil preservers. Probably the question is when were these rocks formed. 

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Ralenka
On 6/2/2020 at 4:57 PM, Rockwood said:

I think that's a sneaky tabulate doing it's rugose impersonation. ;)

I found another similarly looking print near the one above. I almost missed it, but on its side there is these grooves that made me think it might be of organic origin. That one is larger, about 10 cm. Is it also a coral? Thanks!

 

 

0954DD3B-8300-49CA-AC98-BE6F07A8686A.jpeg

7C63DB3E-6EA2-46B4-B31A-B0978C46B879.jpeg

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Rockwood
42 minutes ago, Ralenka said:

Is it also a coral?

It's a little hard to see the detail well, but I think it must be. A tabulate colony is my guess.

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Ralenka

Thanks

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Ludwigia
16 hours ago, Ralenka said:

Are these chert nodules worth exploring? I read that because of their composition they are excellent fossil preservers. Probably the question is when were these rocks formed. 

As far as I know, there's not very much chance of finding a fossil in chert from these layers. You have a much better chance of that in Cretaceous chert.

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Ralenka
8 hours ago, Ludwigia said:

As far as I know, there's not very much chance of finding a fossil in chert from these layers. You have a much better chance of that in Cretaceous chert.

Ok, got it, thanks! Are chert nodules form before the surrounding layer (limestone in this case)?

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Ludwigia
2 hours ago, Ralenka said:

Ok, got it, thanks! Are chert nodules form before the surrounding layer (limestone in this case)?

Read this.

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Ralenka

Thanks, @Ludwigia

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