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piranha

Star-Shaped Trace Fossils

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piranha

Here are two fun fossils from the Pennsylvanian Breathitt Formation in eastern Kentucky. Upon first glance they look like possible Asteriacites sp., starfish resting traces. In fact, they are Asterosoma sp., deposit-feeding worm burrows. These star-shaped ichnofossils are a welcome addition for research and study. Enjoy the new 'stars' to my collection. :D

post-4301-0-49321500-1331338955_thumb.jpg

Paleoecology of an Estuarine Sequence in the Breathitt Formation (Pennsylvanian), Central Appalachian Basin

PALAIOS, Vol. 9, No. 4 (Aug., 1994), pp. 388-402 - Authors: Stephen F. Greb and Donald R. Chesnut, Jr.

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Auspex

Those are nice, well defined examples; way to collect!

(This may be the first thing you've posted that I pretty much knew what it is :) )

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piranha

Thanks Chas... finally had to relieve the ichno-fever wacko.gif:P

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Auspex

I am at very high risk of succumbing to ichno fever; it's all too cool...ahhhh, the collection one could amass! If I had the space, I'd be all over it!

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squalicorax

Reminds me of a type of feeding trace. Gathering around them from one spot. What is the matrix composed of?

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piranha

Reminds me of a type of feeding trace. Gathering around them from one spot. What is the matrix composed of?

You are correct... 'deposit-feeding worm burrows' was a vague description. Thanks for clarifying that point. Reading through the paper indicates that Asterosoma occur in claystones, interbedded sandstone / shale facies and the most robust examples found abundantly in fine-grained sandstones. Although sedimentology is not my long suit, I'd have to go with the latter in this case.

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astron

Very cool additions, Scott :rolleyes:

Congratulations 1.gif

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piranha

Very cool additions, Scott :rolleyes:

Congratulations 1.gif

emo31.gif Thanks Astrinos emo31.gif

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pleecan

It is amazing that a simple brain worm can generate such exquisite complex geometric burrows....

Congratulation on the find!

Edited by pleecan

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piranha

Thanks Peter :D

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mbadgwell

I have found something I was told was a trace fossil bit still unsure. It is in slate and looks almost like a flower with petals instead of trace or star shaped

can anyone jelp

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Roz

I have found something I was told was a trace fossil bit still unsure. It is in slate and looks almost like a flower with petals instead of trace or star shaped

can anyone jelp

Take some images and post them in the ID section.. There is a good chance it can be identified..

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Roz

Excellent and interesting addition.. I would not have had a clue but now I

know what it is I can't believe I didn't know.. :)

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Terry Dactyll

Scott... How weird being so symetrical... Ive never noticed any like that before, Very nice....

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mbadgwell

star shaped fossil is it plant or burrrowing worm

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mbadgwell

thanks Rozelle I posted on I'd section under title

"plant or animal "

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mbadgwell

thanks Rozelle I posted on id section under title

"plant or animal "

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Chrisw422

Nice finds!

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