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Norki

Strange nodules within sandstone concretion from Late Campanian marine sediments, Bearpaw fm.

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Norki

I frequently come across golfball-sized concretions in the marine sandstones of the Late Campanian Bearpaw formation exposed at Lake Diefenbaker, Saskatchewan. Nearly all have small coalified fossils inside, ranging from fish bones to decapod fragments, wood chips, and all other manner of organic detritus.

 

These remains are often difficult to identify (certainly beyond my ability, anyway), typically because they are either too crushed to be recognizable, or have been split on a bad plane. The following photos shows one of these nodules collected last weekend, that caught my eye with its regularity. As you can see, there is a small row of mostly uniform nodules inside, with thin sandstone rinds discontinuous to the matrix, and filled with a black, coal-like mineral, the same which tends to replace other organic remains found in similar nodules.

 

4fbd3e3afb.JPG

 

Any ideas? For reference, here are some other fossils found in similar nodules from a similar layer of the formation, including fish vertebrae and a decapod claw:

 

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9dcfff29be.jpg

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SailingAlongToo

Photo 2 gives me a fishy vibe, possibly vertebrae.

 

Photo 3 definitely looks like a claw.

 

Pretty neat specimens.

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ynot

@GeschWhat @Carl

Does this look like a coprolite?

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ynot
Just now, SailingAlongToo said:

Photo 2 gives me a fishy vibe, possibly vertebrae.

 

Photo 3 definitely looks like a claw.

 

Pretty neat specimens.

That was stated in the opening post and #3 is a decopod.

OP was asking what the first piece is.

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Fossildude19

The first image reminds me of the cutting "teeth" of a crustacean pollex. (crab claw) 

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RJB

#3 is  most deffinetly some kind of shrimp.   Tim may be onto something with #1.  Need better close up photo of #1.

 

RB

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Carl

The one with the fish verts is the one most like a coprolite. Hard to be sure though.

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Plax

I took the fish verts to be cross sections of pine cones. You guys are good.

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GeschWhat
On 4/13/2019 at 8:26 PM, ynot said:

@GeschWhat @Carl

Does this look like a coprolite?

Are you talking about the inclusions in the 1st photo?

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ynot
2 hours ago, GeschWhat said:

Are you talking about the inclusions in the 1st photo?

Yes, but I think Tim got it with crab claw.

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Zenmaster6

Agree with Ron on Shrimp Claw.
I've seen some bulky shrimp claw fossils

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