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Favosite coral structures?


DawnOfADream

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Hello everyone! Today I finally received a fish mortality plate (Pic 1) I had bid on a long time ago. Oddly though it turns out I had bid on multiple items and found this block of what appears to be fossil shells with coral structures at the bottom. After some googling I think it might be favosite?

Any help is appreciated as I know little about fossil shells and corals.

Unfortunately the providence is unknown, as no information was provided.

 

Pic 1- Leptolepsis fish plate. Something appears to have been applied to the specimen and gone terribly wrong. If anyone has any advice to fix it please let me know!


20200402_151029-min.thumb.jpg.e2987119e74e1603ed9a89ceaea463e7.jpg

 

 

2. Front of coral and shell slab 

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3. Back of slab (sorry for the blurriness)

20200402_150830-min.thumb.jpg.d4b7a9c07ebc87d616e4a22b4bf79305.jpg

 

 

 

4. Close up of the favosite (?) coral 

20200402_150743-min.thumb.jpg.81ef695ef91b086a115f8b4040c772b9.jpg

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Some of the impressions in the second picture appear to be that of horn corals or crinoids, it is hard to tell without more pictures. That piece also appears to have some spiriferid brachiopods, and the thing you are calling a favosites is not a coral but a fennestellid bryozoan of some sort.

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I think Misha is right on the brach and bryozoan count 

edit:to be utterly pedantic:I think you mean Leptolepis 

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Fenestellid for sure, maybe Fenestella itself.

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6 hours ago, DawnOfADream said:

Something appears to have been applied to the specimen and gone terribly wrong. If anyone has any advice to fix it please let me know!

 

Leptolepis sprattiformis  are often preserved with dendritic halos around them, but usually they are black. 

fossil-fish-leptolepides-sprattiformis-jurassic-germany-with-manganese-A3WYMT.jpg   soenke-leptolepis-solnhofen.jpg

 

Those are mineral crystals that formed in the rock, by mineralized water seeping through cracks.

I've never seen them in orange like that before, however.

 

It could be a coating of some sort. 

Try to use a little acetone on a Q-tip  in the corner, to see if it removes the orange substance at all. 

 

20200402_151029-min.thumb.jpg.e2987119e74e1603ed9a89ceaea463e7.jpg

 

 

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I wonder if the orange might be on account of higher iron content that would precipitate an oxidized stain. :zzzzscratchchin:

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1 hour ago, Fossildude19 said:

Leptolepis sprattiformis  are often preserved with dendritic halos around them, but usually they are black. 

 

1 hour ago, Fossildude19 said:

Try to use a little acetone on a Q-tip  in the corner, to see if it removes the orange substance at all. 

Thank you! I tried the acetone at the top right corner and nothing came off. 

I looked around online and it appears that dendrites of similar colours are common in Solnhofen! Thanks for solving that, @Fossildude19 and @Kane, I really appreciate it!

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The piece with fenestellids and spiriferids looks like Mahantango Formation stuff to me. 

Very nice indeed. :)

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