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MSirmon

Micro fossil?

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MSirmon

Need some help from the micro fossil experts. I am going through some mud samples from Terkingua TX and found this item. Appx 1/16" long and ribbed. Doesn't look like wood so was thinking something along the lines of a dental plate. I was told it was part of the Aguja formation but am not sure so am trying to pinpoint the actual formation on this map.

 

How far off base am I? 

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Rockwood

Just a cautionary note. There is a mineral, related to tourmaline I think, that has a similar crystalline structure. 

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Rockwood

Tourmaline pyrite is what I'm thinking of. I don't know if it would be seen in fractals on this scale or not. 

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Plax

very small cylindracanthus frag? just guessing of course...

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Fossildude19

:headscratch:

I've got nuthin'! :( 

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Troodon

The Ajuga Formation is definitely found in the area around Terlinga, it's Campanian in age, but I've only see it marked in maps of Big Bend park.   Any chance you can sharpen your photo.

 

 

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MSirmon
2 hours ago, Plax said:

very small cylindracanthus frag? just guessing of course...

That is very interesting Don. Looking at some online photos it looks like it. So now the big question is how to differentiate between the two?

cylindracanthus_rs_scale.jpg

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Rockwood

These have been in limestone since the Ordovician.

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MSirmon

Let's see if these are more discernible. I dissolved the mud and found a few more items. I am attaching pictures.

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