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September 19, 2022 at 5:23 pm #133080Jim ChandlerParticipant
There is a key for identifying ivory. Check it online at:
https://cites.org/sites/default/files/eng/resources/pub/E-Ivory-guide.pdf
Jim
July 2, 2021 at 9:19 pm #104060Jim ChandlerParticipantIf it’s a fossil it could be a coral. It could however be an igneous rock like pumice. Test the rock with some weak hydrochloric acid (also called Muratic acid dilute to 5 percent. If it fizzes it’s more likely to be a fossil.
Also check with a museum or school.
February 5, 2021 at 9:38 pm #94916Jim ChandlerParticipantWhere did you find it? Mostly they are casts of some kind of Gastropoda (snail). But the location and something in the picture for scale ( a coin or ruler) will give more clues as to its identification.
Jim Chandler
January 5, 2021 at 5:41 pm #93023Jim ChandlerParticipant<p style=”direction: ltr;”>Great jobs Louis,</p>
What is the matrix and what holds it together?Jim
January 5, 2021 at 11:46 am #93015Jim ChandlerParticipantHi Bill,
It looks most likely to be ripple marks. Here are some references I found:
I would certainly contact this geology professor as he seems knowledgeable in the area.
https://ngmdb.usgs.gov/Geolex/UnitRefs/RoseHillRefs_3632.html
Of the fossils mentioned here (brachiopods, ostracodes, trilobites, and tentaculitids) it does not match most of these. Only perhaps some ostracod marks.
It definitely looks like it was formed on an old shoreline.
When taking pictures also try to include something for scale. Are there any more edges of this pattern or does it pretty well cover the whole rest of the sample?
Let me know what you find out. I have enjoyed collecting fossils in MD. It has something from every geological period. I have attached a list of MD fossil sites were I collected in 2015.
Let me know what you find out.
Jim Chandler
Attachments:
You must be logged in to view attached files.May 16, 2020 at 9:11 am #69627Jim ChandlerParticipantIt could also be a pseudo-fossil. What kind of rock is it?
Jim Chandler
May 15, 2020 at 10:04 pm #69626Jim ChandlerParticipantLooks promising. Look at a geological bedrock map of your area to see if your area has bedrock for the time of dinosaurs. Show it to a paleontologist in your area. Put a coin or ruler in your picture for scale.
Jim Chandler
March 10, 2019 at 5:35 am #47108Jim ChandlerParticipantHi Dave,
Cool fossil! I am an amateur like you. I did some searching on the web and found an article about brachiopods with spines. Perhaps the author has the knowledge you are after. Also there are some references about identifying similar brachiopods you mentioned. Good luck hunting let me know what you find out.
Jim Chandler
October 5, 2018 at 12:10 pm #41938Jim ChandlerParticipantHello Apostoulos,
“Horn coral. Horn coral, any coral of the order Rugosa, which first appeared in the geologic record during the Ordovician Period, which began <b>488 million years ago</b>; the Rugosa persisted through the Permian Period, which ended <b>251 million years ago</b>. (Britannica Encyclopedia)” I know virtually next to nothing about Crete geology. If I read this 1996 reference correctly ( http://www.uqac.ca/mhiggins/chapters.html ) It seems like the geology of this area is much younger except for maybe the Permian Period. Let me know what you find out about the Vatos unit. I live in Maine, USA. Perhaps the Natural History Museum of Crete can help. http://www.nhmc.uoc.gr/ or http://www.nhmc.uoc.gr/en
Also see: https://en.wikipedia.org/wiki/Rugosa
Jim
October 2, 2018 at 9:12 am #41850Jim ChandlerParticipantPossibly a horn coral. Where did you find them?
January 29, 2018 at 6:05 pm #30488Jim ChandlerParticipantPerhaps this is a calyx. Good eye to pick up this subtle detail. However it is too indistinct to be sure it is a calyx. Check out some images of better preserved calyx at:https://www.google.com/search?q=crinoid+calyx&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi43eLPlP7YAhXHg-AKHX30CVoQ_AUICigB&biw=1280&bih=630#imgrc=_
Jim
January 26, 2018 at 9:01 pm #30461Jim ChandlerParticipantMost definitely crinoids. You could probably also find them in a nearby outcrop.
Jim
December 6, 2017 at 9:15 pm #29536Jim ChandlerParticipantHi Gail, I have not collected any fossils in the West so I am not very familiar with fossils in that area. My best guess to get the discussion going is that it is a bone of some kind. (maybe a hoof, but I am very much guessing.) If I found a similar fossil in a marine sediment I might be tempted to call it a coral, but I think it may be a bone. Where in South Dakota did you find it. Combining the location with a geological map may help you narrow down what kind of environment it was formed in. A simple map is found at http://www.sdgs.usd.edu/geologyofsd/geosd.html
Also look at websites about the fossils of South Dakota. https://www3.northern.edu/natsource/earth/Fossil1.htm
If it is a bone it does not look like it has much matrix to remove. Hopefully someone more knowledgeable of fossils in your area will respond too.
August 30, 2017 at 12:32 pm #25336Jim ChandlerParticipantNo poster was attached. I see it now. Thanks.
June 23, 2017 at 7:05 am #24052Jim ChandlerParticipantThe “Poka-dotted” fossils in photos 1&2 are bryozoans.
Jim
May 30, 2017 at 6:14 am #23050Jim ChandlerParticipantHere are some good guides to dinosaur teeth:
http://digfieldschool.org/wp-content/uploads/2013/08/Fossil-ID-Guide_06_28_12.pdf
May 28, 2017 at 4:16 pm #23035Jim ChandlerParticipantIt is probably not possible with a small piece to identify a dinosaur bone to this level. There is a good discussion of this on the fossil forum:
http://www.thefossilforum.com/index.php?/topic/38748-could-this-be-real-t-rex-bone/
My only direct experience with dinosaur bones was on a tour of the Gobi desert. We were told if you licked a rock and it stuck to your lip it was a dinosaur bone, if not it was a stone. So we spent the afternoon in the desert licking stones.
Jim
January 27, 2017 at 5:25 pm #18343Jim ChandlerParticipantI agree. Where can we go for oysters?
Jim
January 27, 2017 at 1:39 pm #18223Jim ChandlerParticipantYes thanks.
Jim
January 27, 2017 at 10:43 am #18219Jim ChandlerParticipantHi Lance @lance-comfort, I am just trying to learn about fossil identification so I think your knowledge base is much greater than mine. I did do some web searches about Lopha species. I did find one East Coast citation in North Carolina for Lopha frons
http://discoverlife.org/mp/20q?guide=Mollusca_Bivalvia_species&flags=HAS:
Also checking further the name Lopha frons is not accepted and the valid name is: Dendostrea frons
http://z14.invisionfree.com/Conchologist_Forum/ar/t2410.htm
Might this be what you found?
What resources do you find best for identifying invertebrate fossils?
Jim Chandler
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