BobWill Posted November 14, 2020 Share Posted November 14, 2020 8 hours ago, westcoast said: Yes, they are not common but i have come across references to Pennsylvanian dendritic graptolites but have not pursued in detail I am interested in learning more about these since I focus on the Pennsylvanian sub-period. Every reference I can find shows them living only into the Mississippian. It would be great if anyone knows more about these. James' specimen could hardly be considered dendritic anyway so I think we can eliminate that possibility. edit: I just noticed John's comment and will try another search. I wonder if the ones from Kansas City were verified to not be dendrites of the other kind. Link to comment Share on other sites More sharing options...
DPS Ammonite Posted November 14, 2020 Share Posted November 14, 2020 2 hours ago, BobWill said: I am interested in learning more about these since I focus on the Pennsylvanian sub-period. Every reference I can find shows them living only into the Mississippian. It would be great if anyone knows more about these. James' specimen could hardly be considered dendritic anyway so I think we can eliminate that possibility. edit: I just noticed John's comment and will try another search. I wonder if the ones from Kansas City were verified to not be dendrites of the other kind. It looks like the Treatise is also a reference. https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.931.4246&rep=rep1&type=pdf 1 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
James Ryan Posted November 14, 2020 Author Share Posted November 14, 2020 How do y’all recommend I go about cleaning for better photos. Magnetic test came back negative, I suppose that was as in-depth as I went, but would rule out farm equipment..... the way it blended in with it’s natural surroundings and strata was far too natural for me to assume it is metal. I am open to doing whatever tests y’all recommend. Link to comment Share on other sites More sharing options...
daves64 Posted November 14, 2020 Share Posted November 14, 2020 If it is lead, magnets wouldn't work. Lead isn't magnetic, but it is heavy. Try scoring a small area with the tip of a knife. If it's lead or another soft metal, the knife will cut into it a bit. Accomplishing the impossible means only that the boss will add it to your regular duties. Link to comment Share on other sites More sharing options...
Top Trilo Posted November 14, 2020 Share Posted November 14, 2020 A streak test might help “If fossils are not "boggling" your mind then you are simply not doing it right” -Ken (digit) "No fossil is garbage, it´s just not completely preserved” -Franz (FranzBernhard) "With hammer in hand, the open horizon of time, and dear friends by my side, what can we not accomplish together?" -Kane (Kane) "We are in a way conquering time, reuniting members of a long lost family" -Quincy (Opabinia Blues) "I loved reading the trip reports, I loved the sharing, I loved the educational aspect, I loved the humor. It felt like home. It still does" -Mike (Pagurus) “The best deal I ever got was getting accepted as a member on The Fossil Forum. Not only got an invaluable pool of knowledge, but gained a loving family as well.” -Doren (caldigger) "it really is nice, to visit the oasis that is TFF" -Tim (fossildude19) "Life's Good! -Adam (Tidgy's Dad) Link to comment Share on other sites More sharing options...
James Ryan Posted November 14, 2020 Author Share Posted November 14, 2020 Knife will not cut into it a bit. Link to comment Share on other sites More sharing options...
James Ryan Posted November 14, 2020 Author Share Posted November 14, 2020 Link to comment Share on other sites More sharing options...
Mahnmut Posted November 14, 2020 Share Posted November 14, 2020 Ok, with the magnet you have ruled out pure iron, nickel and cobalt as well as some other elements and alloys. But not even all kinds of steel are magnetic. If you cannot scratch it it is not lead (nor pure copper, tin, aluminum or gold). Another thing to try (without damaging it) is measuring its density. Easiest way to estimate the volume is putting it into a full glass of water, best with a grommet, carefully und measuring how much water flows out. Then divide the samples weight by the volume (or weight of the water, density 1g/cm³) and you know your samples density. Many common metals are about twice as dense (around 6-8g/cm³) as your average stone and fossils(2-4g/cm³), that would explain it feeling heavy. of course there are exceptions like aluminum, but you ruled those out already. If it is really heavy (12-20 g/cm³) it gets interesting...gold, platinum, uranium Sorry I do only know the metric values. Best regards, J 1 Try to learn something about everything and everything about something Thomas Henry Huxley Link to comment Share on other sites More sharing options...
James Ryan Posted November 14, 2020 Author Share Posted November 14, 2020 My apologies, fellas, it is metal. Link to comment Share on other sites More sharing options...
James Ryan Posted November 14, 2020 Author Share Posted November 14, 2020 62708526024__D44E2BF0-8D62-4A5D-8DCD-D8FE66646C1E.MOV Link to comment Share on other sites More sharing options...
westcoast Posted November 15, 2020 Share Posted November 15, 2020 8 hours ago, BobWill said: I am interested in learning more about these since I focus on the Pennsylvanian sub-period. Every reference I can find shows them living only into the Mississippian. It would be great if anyone knows more about these. James' specimen could hardly be considered dendritic anyway so I think we can eliminate that possibility. edit: I just noticed John's comment and will try another search. I wonder if the ones from Kansas City were verified to not be dendrites of the other kind. My mistake, the reference I had seen was from the lower Namurian, hence top of Mississipian. 1 Link to comment Share on other sites More sharing options...
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