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Hello,

I made this trip actually yet in 2020, on December 29th, but I didn't have time to post it earlier. I went to Sulejów, which is a former limestone mine now flooded with water:

image.png.701c118bdaf614cb2c23ada2ab8a1261.png

 

Nearby there is an active mine, but they don't let in fossil hunters :(

 

Anyway, I was hoping that the water level would be low enough to permit browsing the slopes and it was so - of course not in every place. Some parts of the reservoir are overgrown and not very accessible:

image.png.1233dad3f1277e20d8c869a9dd537120.png

image.png.7471acd43f14fd27c20df5e946b5ddf6.png

 

There were however a few slopes where I could go closer to the water level and browse the rocks:

 

 

 

 

 

 

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image.png.c9b39e839bfe2b68fc0724435a4f2b40.png

 

Some of the slopes look really interesting, however to reach them I would need specialised equipment and climbing skills :)

 

image.png.c66e5599bcbde30baaf5ef220b6b63b1.png

 

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We went all along the "lake" to check if there are any other accessible sites:

image.png.54c36ee79a8690a5a623f54cdf19c68a.png

 

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image.png.7a8ff870678d0aa8e1d80369dd798658.png

 

I found some snails:

image.png.b95629cf876259be4ffa782369db555d.png

image.png.8f8ba7ea33b5b3395895b054a465ad28.png

 

Something that could be either an echinoid or a cinoid?

image.png.7b0dbf4ca6fac2574ad9833b4207570b.png

 

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image.png.18363df7c333c2d94f1f50b1df53db94.png

 

There were also quite a few fossils that look like this:

image.png.5088359688ec9e78f47012a8456d3f90.png

image.png.4c3055c4e8b36f9bbfd8c3b2eba6f2ec.png

image.png.efb10fd348ed81fec9e0d8bc7c2d4a05.png

 

 

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The preservation is not very good - we found as well a few shells:

image.png.a547ef2df11b7976c3747286509d397a.png

image.png.28f2005490099042eab80ccc4a617600.png

 

image.png.b4efc9f74224b4fcc6ddabf12987f99a.png

 

image.png.5fd42af7b1c742fda47676b49cb0264a.png

 

I will for sure come back in summer - then even if I fail climbing the slopes and end up in water, it will not be that bad :))

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Dimitris

Nice! Looks like you may need a small inflatable!

Could the site be Late Jurassic transition to Cretaceous? First and second picture with fossils, they look like some Nerinea sp.

In next pictures, those long fossils look like rudists.

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Nimravis

Great finds and thanks for posting pictures of the area that you were hunting. Many members just put up pictures of the fossils, but the area that they come from adds to the post. Thanks again.

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12 hours ago, Dimitris said:

Nice! Looks like you may need a small inflatable!

Could the site be Late Jurassic transition to Cretaceous? First and second picture with fossils, they look like some Nerinea sp.

In next pictures, those long fossils look like rudists.

It is indeed late Jurassic, you're right. Is such poor preservation normal for such sites? Because usually the fossils I find in Jurassic sites look much better and these are mainly steinkerns....

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10 hours ago, Nimravis said:

Great finds and thanks for posting pictures of the area that you were hunting. Many members just put up pictures of the fossils, but the area that they come from adds to the post. Thanks again.

Thanks - I like taking TFF Members for virtual trips to new sites :)) 

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That's a nice location, Kasia - thanks for showing us!

 

Maybe you'll find some better-preserved items when you go back in the summer :fingerscrossed:

 

(And even if you don't, at least you'll have a pretty place to go for a nice summer hike!)

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Dimitris
10 hours ago, Kasia said:

It is indeed late Jurassic, you're right. Is such poor preservation normal for such sites? Because usually the fossils I find in Jurassic sites look much better and these are mainly steinkerns....

It depends the site.  I think the preservation quality is determined by i) material that replaced the animal ii) tectonics iii) percentage of moisture and oxygen during the fossilization process, among other factors. Don't discard the location though. Sometimes small fossils are poor but you may score something big. I found an outcrop of mid-late Cretaceous in NW Bulgaria. First day I found some small and fragile inoceramids. Next time been there, I found fragments of heteromorphic ammonites and a nice big Inoceramus sp in very good state, although fractured in two pieces.

 

If its near, visit it again. Some places neglected by most, can haul a treasure.

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23 minutes ago, Dimitris said:

It depends the site.  I think the preservation quality is determined by i) material that replaced the animal ii) tectonics iii) percentage of moisture and oxygen during the fossilization process, among other factors. Don't discard the location though. Sometimes small fossils are poor but you may score something big. I found an outcrop of mid-late Cretaceous in NW Bulgaria. First day I found some small and fragile inoceramids. Next time been there, I found fragments of heteromorphic ammonites and a nice big Inoceramus sp in very good state, although fractured in two pieces.

 

If its near, visit it again. Some places neglected by most, can haul a treasure.

I will go back for sure, but probably when days become longer - because it's almost 180 km one way, so now in winter even if I set off early morning, there is not much time we can spent at site, because it gets dark quite early. I was just wondering if I should keep the finds or not - because of their condition :)

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ColombianFossils

This was really interesting to read and great pictures to accompany the story. Thanks for posting :D

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Dimitris
12 hours ago, Kasia said:

I will go back for sure, but probably when days become longer - because it's almost 180 km one way, so now in winter even if I set off early morning, there is not much time we can spent at site, because it gets dark quite early. I was just wondering if I should keep the finds or not - because of their condition :)

Personally, my low grade fossils are placed in pots to keep the soil of the plants in place. Others will be donated to schools along with some doubles.

Keep something for reference, like this piece with the small shell, it may help you later define the geological age.

The whole surrounding area has late Jurassic references on paleodb.

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10 hours ago, ColombianFossils said:

This was really interesting to read and great pictures to accompany the story. Thanks for posting :D

Thanks - I'm waiting to see your trips in Colombia :), which is on my short list of countries to visit soon. I will be glad to learn what are the fossil hunting sites over there 

giphy.gif

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fifbrindacier

Hi Kasia, thanks for sharing your experience in the Jurassic times.

As @Dimitris said, some of your fossils could be rudists. The rudists existed during the Jurassic period, i know a kimmeridgian site and an oxfordian one where you can find some. They are related to the oysters.

Here, on your photo, i circled in blue what i think is a terebratula and in yellow what can be oysters.

Inkedimage.png.efb10fd348ed81fec9e0d8bc7c2d4a05_LI.jpg.877939e1b26ac706954a0c66d05e103e.jpg

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5 hours ago, fifbrindacier said:

Hi Kasia, thanks for sharing your experience in the Jurassic times.

As @Dimitris said, some of your fossils could be rudists. The rudists existed during the Jurassic period, i know a kimmeridgian site and an oxfordian one where you can find some. They are related to the oysters.

Here, on your photo, i circled in blue what i think is a terebratula and in yellow what can be oysters.

Inkedimage.png.efb10fd348ed81fec9e0d8bc7c2d4a05_LI.jpg.877939e1b26ac706954a0c66d05e103e.jpg

Thanks Sophie - maybe I will take close-ups of those and I will send you by mail so that you could have a better look? Is that OK?

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fifbrindacier

Ok.

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