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Devonian microfossils from Arkona


Greg.Wood

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Here is my collection of small/micro fossils from the Arkona formation in Southern Ontario. Everything here was collected by soaking clay from the Arkona fm and sifting out the solid matrix. I'm sure many of my IDs are way off so please correct me and fill in the unknowns if you recognize anything!

 

Tentaculites

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Bactrites sp.

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Left: Tornoceras sp.

Right: Maclurites? sp.

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Left: Holopea? sp.

Right: Nanticonema lineata

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Left: Hormotoma? sp.

Right: Platyceras sp.

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Left: Scaphopods

Right: Hyoliths

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Left: Paracyclas lirata

Right: Prothyris? sp.

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Left: Nuculana rostellata

Right: unknown

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Left: Nuculites triqueter

Right: Nuculites pacatus

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Left: unknown

Right: unknown

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Left: Spirifer sp. and Delthyris sp.

Right: Chonetes  sp.

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Left: Cyrtina sp.

Right: Cyrtina sp.

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Left: Camarotoechia  sp.

Right: Camarotoechia  sp.

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Left: Onniella trigona

Right: unknown

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Left: Terebratula sp.

Right: Productella spinulicosta

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Ostracods

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Left: Eldredgeops sp.

Right: Eldredgeops sp.

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unknown blastoid

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Devonaster? sp. arm fragment

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crinoid fragments

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A few more that wouldn't fit in the original post:

 

More crinoid fragments

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Crinoid calyx and another partial

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Crinoid holdfast

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Microcyclus thedfordensis

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Corals and bryozoans

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Oh, fantastic post Greg, nice pictures :)

Do you have the exact age of the fossils. looks like a late devonian fauna to me.

 

 

growing old is mandatory but growing up is optional.

 

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1 hour ago, Manticocerasman said:

Oh, fantastic post Greg, nice pictures :)

Do you have the exact age of the fossils. looks like a late devonian fauna to me.

 

 

in the lower 380s of MYA. early Givetian stage, so mid-Devonian, at the more upper end.

...How to Philosophize with a Hammer

 

 

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Just now, Kane said:

in the lower 380s of MYA. early Givetian stage, so mid-Devonian, at the more upper end.

Thx Kane 380MYA, thats about the same age as the Frasnian - Fammenian border where I collect fossils in my area

 

growing old is mandatory but growing up is optional.

 

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1 minute ago, Manticocerasman said:

Thx Kane 380MYA, thats about the same age as the Frasnian - Fammenian border where I collect fossils in my area

 

I thought that stage was more in the 370s? That is certainly an exciting time as it marks the Kellwasser extinction event. The Givetian was still pretty pleasant times, at least where these fossils were once situated. :D In the Arkona proper, there is a great deal of turbidity, caused by storms, accounting for all the mud, which was constantly being reworked.

...How to Philosophize with a Hammer

 

 

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Great post, Greg!

Nice fossils and photography!

Well done. :) 

    Tim    -  VETERAN SHALE SPLITTER

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Magnificent collection there Greg. I'm really impressed by both the specimens and the photography. I'm not used to see such biodiversity of micro fossils from the Devonian. Congratulations and thanks for sharing.

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Well done!  I like the organization and quality of your photos.  The size variation within a single species is fascinating.

 

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Incredibly good photos of a fascinating micro fauna. 

One of those crinoid stems is simply astonishingly beautiful and I love the tentaculites and the hyoliths in particular :wub:

Life's Good!

Tortoise Friend.

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1 hour ago, ynot said:

Are You using a photo stacker?

I tried, but it didn't work very well this time. I ended up using ms paint to cut out sharper images and paste them over the blurry ones.

 

1 hour ago, Tidgy's Dad said:

One of those crinoid stems is simply astonishingly beautiful and I love the tentaculites and the hyoliths in particular

Some of my favorites as well. Most of the hyoliths are broken so I was quite happy when I finally found this one:

Hyolitha.jpg.35c396106e76ea3b31e42d9ff2da3299.jpg

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8 minutes ago, Greg.Wood said:

 

I tried, but it didn't work very well this time. I ended up using ms paint to cut out sharper images and paste them over the blurry ones.

 

Some of my favorites as well. Most of the hyoliths are broken so I was quite happy when I finally found this one:

Hyolitha.jpg.35c396106e76ea3b31e42d9ff2da3299.jpg

That's a beaut! Excellent preservation! :envy:

Life's Good!

Tortoise Friend.

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Nice collection! And the great thing about it is that it doesn't take up much space :) I think you've done just fine with the ids. Is that all from one dig or did you take several loads?

 

Greetings from the Lake of Constance. Roger

http://www.steinkern.de/

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19 hours ago, Ludwigia said:

Nice collection! And the great thing about it is that it doesn't take up much space :) I think you've done just fine with the ids. Is that all from one dig or did you take several loads?

I took two trips, one bucket to start and see if it was worthwhile then I went back and filled 3 more when we had a bit of a thaw. I'll have to look for some gravel beds next year where the river has done some of the work for me...a 5 gallon bucket of clay only yields about 1-2 cups of matrix.

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2 hours ago, Greg.Wood said:

I took two trips, one bucket to start and see if it was worthwhile then I went back and filled 3 more when we had a bit of a thaw. I'll have to look for some gravel beds next year where the river has done some of the work for me...a 5 gallon bucket of clay only yields about 1-2 cups of matrix.

Thanks. Did you fill them in the north or the south pit? Or the river bank?

 

Greetings from the Lake of Constance. Roger

http://www.steinkern.de/

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  • 3 years later...

I know this is an old thread, but the photography is absolutely crazy here! If you wouldn't mind me asking, what did you take them with, and what microscope? I'm looking to upgrade my gear!

~ Isaac; www.isaactfm.com 

 

"Don't move! He can't see us if we don't move!" - Alan Grant

 

Come to the spring that is The Fossil Forum, where the stream of warmth and knowledge never runs dry.

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