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Carboniferouspat

Mazon creek Horseshoe crabs

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Carboniferouspat

Which of the Mazon creek Horseshoes would have been closer to fresh or brackish environment.  Has anyone found a Euroopes at Fossil Rock??

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Nimravis

Even though I never collected at Fossil Rock Campground when it was open, I did collect extensively at Shadow Lakes and an area across the street from that location. That area was the former site of the coal mining Pit 4. I also believe that Fossil Rock was in that same area. Pit 4 contained Freshwater Braidwood Fauna. Here are two pics of different Freshwater Euproops danae Horeseshoe crabs that I found at Pit 4. With that said, I also found a Eurypterid (Marine - Essex Fauna) at Pit 4, that may have been deposited in Fresh water during a storm 300 Million years ago.

 

IMG_8290.thumb.jpg.5755e75f5cee099242ea8e82a16ad501.jpgIMG_8291.thumb.jpg.c350edd4e9c9e4112905be587618e46a.jpg

 

My Eurypterid-

 

IMG_5427.thumb.JPG.dad7c9d9e8be8cb721677aaaef2fc2d1.JPG

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WhodamanHD

@Nimravis is it possible the eurypterid was a freshwater one? I know many of the later ones were.

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Nimravis
16 hours ago, WhodamanHD said:

@Nimravis is it possible the eurypterid was a freshwater one? I know many of the later ones were.

It could possibly be, but not sure. 

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Carboniferouspat

Thanks for that info,and the pics you posted. That euripterid is awesome...... what is the size of that?

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TheRocksWillShoutHisGlory

Richardson's guide references a study of over 200,000 concretions and there were specimens of horseshoe crabs found in both the braidwood and essex biotas, although very few.

 

And just for reference fossil rock was pit 2, I only got to collect there once and really wish I could go back.

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Tidgy's Dad

Very interesting.

I love the eurypterid.  

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Nimravis
19 minutes ago, Tidgy's Dad said:

Very interesting.

I love the eurypterid.  

Thanks- The funny thing with that concretion is that it had a consistency far different from other concretions that would have fossils. This one looked kind of sandy and if it was cleaned when I first picked it up I would thrown it right down. After I washed the concretions that I collected that day I was cracking some open to show my young niece who was visiting. When I grabbed that one out of the bucket, I told her - "this concretion will not contain a fossil", I was wrong and so happy that I did open it.

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doushantuo

can recommend this(Baird,Palaios 1986):

fernaristlanthc.jpg

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Nimravis
On 11/7/2017 at 8:07 PM, Carboniferouspat said:

Thanks for that info,and the pics you posted. That euripterid is awesome...... what is the size of that?

The fossil it self is about 3" long.

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Carboniferouspat

That's an amazing find. I hope to be as lucky one day.

Do you still collect much?

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