Tapeworm eggs found in fossilized shark feces | Page 2 | TigerDroppings.com

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danfraz
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San Antonio TX
Member since Apr 2008
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re: Tapeworm eggs found in fossilized shark feces


quote:

Yes, but what is the actual meaning of all this?



It means there is no God and that you came from shark shit


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Pectus
New Orleans Saints Fan
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re: Tapeworm eggs found in fossilized shark feces


It makes complete sense that there were parasites then just like parasites now.

The weird thing is the seawater aspect.

Maybe the shark actually ate an animal with tapeworms?






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bhtigerfan
Baton Rouge
Member since Sep 2008
3639 posts

re: Tapeworm eggs found in fossilized shark feces


How does a turd survive 270-300 million years? I know it's fossilized, but how'll g does that take.

Can I turn one of my turds into a fossil?






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Pectus
New Orleans Saints Fan
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re: Tapeworm eggs found in fossilized shark feces


quote:

How does a turd survive 270-300 million years? I know it's fossilized, but how'll g does that take.



Ooh! Ooh! I know this! Can I answer it?

You are exactly right in your assessment that something so squishy and full of organic matter shouldn't be preserved and last for millions of years. But these kinds of things happen! They happen in environments that allow for exceptional preservation. One such environment is a part of the deep ocean that has relatively low levels of oxygen at the bottom.

If you exposed a poop to air on land, it would be decomposed in a day. But in water, there are much fewer microbes that lead to the decomposition of the poop. And some places in the ocean have so little oxygen that the poop can stay on the bottom without much change and slowly get covered by fine-grained sediment until it lithifies and becomes a poop trapped in a rock.

But that poop has to become a rock like this



to be a fossil and stay in the fossil record. That's where mineral rich waters in the pores of the sediment that trapped the poop come into play. Those minerals replace the organic matter until all that's left is something that is rich in iron, sulfur, or both to make a fossilized poop.

Then that fine-grain sediment it's in has to be weathered away preferentially over the (now) coprolite and voila, you have a lone shark poop as a fossil.

quote:

Can I turn one of my turds into a fossil?


Yup. Just like the poop in our example, you have to replace the organic soft stuff with hard stuff. You can cheat the system and use a whole bunch of salt, lime powder, or, heck, kitty litter almost could get you there. But keep in mind that most paleontologists only consider things older than 10,000 years to be fossils. So, I'd eat some mammoth burgers, then you could radiocarbon date that and prove it to be a fossil!

-pec






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bhtigerfan
Baton Rouge
Member since Sep 2008
3639 posts

re: Tapeworm eggs found in fossilized shark feces


Thanks Pectus, that was very educational. I'm assuming the fossilized shark turd was recovered on land where there was previously an ancient ocean?


This post was edited on 2/6 at 9:58 am


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Yellerhammer5
Alabama Fan
Member since Oct 2012
2090 posts

re: Tapeworm eggs found in fossilized shark feces


270 million? Doesn't look a day over 250 million years old.





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Pectus
New Orleans Saints Fan
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re: Tapeworm eggs found in fossilized shark feces


quote:

I'm assuming the fossilized shark turd was recovered on land where there was previously an ancient ocean?



Bingo.






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manwich
UCF Fan
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re: Tapeworm eggs found in fossilized shark feces


quote:

That's where mineral rich waters in the pores of the sediment that trapped the poop come into play. Those minerals replace the organic matter until all that's left is something that is rich in iron, sulfur, or both to make a fossilized poop.

Then that fine-grain sediment it's in has to be weathered away preferentially over the (now) coprolite and voila, you have a lone shark poop as a fossil.
so is it poop or is it just sediment that filled in the poop-shaped cavity leaving some poopy material behind?






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Pectus
New Orleans Saints Fan
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re: Tapeworm eggs found in fossilized shark feces


quote:

so is it poop or is it just sediment that filled in the poop-shaped cavity leaving some poopy material behind?



It can be both.

The one I explained has the organic molecules that make up the poop being replaced by inorganic molecules that eventually will make iron oxide or iron sulfate minerals (hematite, pyrite, etc). This is permineralization of the poop(petrification if you will [although it's a slightly different process]).

Another scenario is that the poop gets covered then it dissolves or degrades away and leaves a poop-shaped cavity in the rock which would get filled later by sediment that would be less susceptible to weathering when finally exposed than the surrounding rock. That would be a cast.


So paleontologists consider one to be the actual fossil, just altered remains, and the other to be a replica of the original fossil (cast).



This post was edited on 2/6 at 10:15 am


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manwich
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re: Tapeworm eggs found in fossilized shark feces


God's little souvenirs





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