austinswamp Posted March 19, 2017 Share Posted March 19, 2017 Greetings I found this mammoth tusk but the tip broke and was wondering if there was a good bonding agent I could buy from the store? Any advice towards a preservative would be appreciated as well. Thanks Link to comment Share on other sites More sharing options...
JohnJ Posted March 19, 2017 Share Posted March 19, 2017 Awesome find! I would wrap it in a two part (lengthwise) plaster cast. Use damp paper towels or tissue as the underlayer touching the tusk. Lay plaster soaked strips of cloth halfway around the circumference down the length of it. Once that sets, flip it over, clean up the edges of the plaster and use a narrow strip of plastic (along the edge of the initial plaster coat) to create a 'separator' between the edges of the half plaster jackets. Plaster the second side, and put it somewhere warm and dry, like your garage, to let it slowly dry out for the next couple months. The moisture will evaporate slowly through the plaster. The plaster jackets will keep the tusk from falling apart (very common occurrence for Texas tusks) while it dries. Others will offer some good advice on what consolidants to use when you remove half the jacket. @Ptychodus04 @Harry Pristis @jpc The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
austinswamp Posted March 19, 2017 Author Share Posted March 19, 2017 Thanks! I'm fairly intimidated because of how heavy it is I would look for a YouTube video but it probably doesn't exist. I'm not all that clear on the plastic part of the process Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted March 19, 2017 Share Posted March 19, 2017 Killer find. Looks high grade. How big is it overall? Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
austinswamp Posted March 19, 2017 Author Share Posted March 19, 2017 About four foot, super heavy...Can't believe it . Link to comment Share on other sites More sharing options...
JohnJ Posted March 19, 2017 Share Posted March 19, 2017 You just want a strip of something non-absorbent to keep the wet plaster from bonding to the dry plaster on the other side. Aluminum foil would do. This 'separator' will allow you to remove half the jacket a little easier when the tusk is dry and you're ready to consolidate. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
austinswamp Posted March 19, 2017 Author Share Posted March 19, 2017 8 minutes ago, Uncle Siphuncle said: Killer find. Looks high grade. How big is it overall? Haven't done proper measurement Link to comment Share on other sites More sharing options...
GeschWhat Posted March 19, 2017 Share Posted March 19, 2017 Wow! I would love to see photos once you get it out and cleaned up! Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
austinswamp Posted March 19, 2017 Author Share Posted March 19, 2017 Link to comment Share on other sites More sharing options...
jpc Posted March 19, 2017 Share Posted March 19, 2017 Not to discourage you, but Mammoth tusks are roughly the worse fossils in the world to work on. They literally want to fall apart. The one i was involved with was a dry tusk. We loaded it with vinac and cyanoacrylate, but you can't use these things on wet fossils. Yours looks wet based on the puddle visible in the first photo. I really don't know how to deal with wet tusks. One thing you may want to do is wrap it in a plastic garbage bag and only open it up a little bit so that it dries very slowly. Fast drying will ruin it. You may want to contact ian .... Dang, forgot his last name, at the Denver Museum of nature and science. They dug up a ton of pleistocene goodies, incuding mammoths and mastodons a few years ago from a very wet site near Aspen. Link to comment Share on other sites More sharing options...
austinswamp Posted March 19, 2017 Author Share Posted March 19, 2017 Thanks a lot Link to comment Share on other sites More sharing options...
austinswamp Posted March 19, 2017 Author Share Posted March 19, 2017 1 hour ago, Uncle Siphuncle said: Killer find. Looks high grade. How big is it overall? 45 lbs Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted March 19, 2017 Share Posted March 19, 2017 I look forward to seeing it cleaned up. Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
steelhead9 Posted March 19, 2017 Share Posted March 19, 2017 I would RUN back to the site and look for the rest of the tusk as it appears you have about half of it. With that level of preservation, it's bound to be there somewhere. Good luck with the tusk, it's a beauty! Still Life Fossils Link to comment Share on other sites More sharing options...
Ptychodus04 Posted March 19, 2017 Share Posted March 19, 2017 Awesome find. Mammoth's are a curse, but a beautiful one!! If it's still wet, wrap it up immediately in a bunch of beach towels or newspaper and get them wet (damp, not dripping) Then wrap this in a few dry towels or dry newspaper. If it fits in a box, put it in and close the lid for at least a month to severely slow the drying process. If you don't, it will probably start falling apart very soon. If it's already dry, time to get to work on it. It looks like overall, there's little matrix on it so the clean up should be pretty straightforward. If the sediment is fairly soft, you can use a toothbrush dipped in acetone to soften it and scrape away. Don't use water as it will restart the drying/falling apart process if you use too much. Once you get it clean, I would use PVA (B-15) or Butvar as a consolidant. Use a brush on method and apply several coats. Then use cyanoacrylate to affix the broken end. Or... Save yourself all the trouble and run it up to Dallas and I'll be happy to prep it for you! Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
Max-fossils Posted March 19, 2017 Share Posted March 19, 2017 That's an Amazon find, congrats! I've never found something that big, so I can't really help with anything... I just wanted to say I am impressed with that find. Regards, Max Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
CBOB Posted March 19, 2017 Share Posted March 19, 2017 High Five!!!!! That's a sweet find!!! What a great specimen. Congrats! Link to comment Share on other sites More sharing options...
RJB Posted March 19, 2017 Share Posted March 19, 2017 So much really good quality help here on this forum! But what a really cool find! Just wish it was sittin on my prep bench. RB Link to comment Share on other sites More sharing options...
lcordova Posted March 19, 2017 Share Posted March 19, 2017 Congrats on that awesome find! Link to comment Share on other sites More sharing options...
garyc Posted March 20, 2017 Share Posted March 20, 2017 If you need any help looking for the rest I'd be glad to make the 2 hour drive! Link to comment Share on other sites More sharing options...
Shellseeker Posted March 20, 2017 Share Posted March 20, 2017 On 3/19/2017 at 0:10 AM, jpc said: Not to discourage you, but Mammoth tusks are roughly the worse fossils in the world to work on. They literally want to fall apart. The one i was involved with was a dry tusk. We loaded it with vinac and cyanoacrylate, but you can't use these things on wet fossils. Yours looks wet based on the puddle visible in the first photo. I really don't know how to deal with wet tusks. One thing you may want to do is wrap it in a plastic garbage bag and only open it up a little bit so that it dries very slowly. Fast drying will ruin it. You may want to contact ian .... Dang, forgot his last name, at the Denver Museum of nature and science. They dug up a ton of pleistocene goodies, incuding mammoths and mastodons a few years ago from a very wet site near Aspen. JPC, Usually it is unpredictable, and sometimes newbee foolishness is not punished. I found this chunk in March 2013, did nothing to it, and checked it 15 minutes ago.. It still is as stable as it was years ago. Know what I know now, and with some bad experiences, I likely should have stabilized it back then. I am wondering if I should take precautions now. The White Queen ".... in her youth she could believe "six impossible things before breakfast" Link to comment Share on other sites More sharing options...
jcbshark Posted March 20, 2017 Share Posted March 20, 2017 Awesome find! Every once in a great while it's not just a big rock down there! Link to comment Share on other sites More sharing options...
FossilDudeCO Posted March 21, 2017 Share Posted March 21, 2017 GREAT find! The name @jpc was thinking of at the Denver Museum is Ian Miller. He is a paleobotanist but worked on the "Snowmastodon" (Snowmass) site here in Colorado. He would surely be able to provide some tips if you can reach him! Can't wait to see this sucker prepped out and displayed! Link to comment Share on other sites More sharing options...
paulgdls Posted March 22, 2017 Share Posted March 22, 2017 Hi DILUTE PVA wood glue (10:1 by volume, diluted using water) brushed on repeatedly as it SLOWLY dries out. I've conserved many tusk sections using this method and IT WORKS. Once the specimen has completely dried out paraloid or similar can be used to further stabilize and conserve it. Paul Link to comment Share on other sites More sharing options...
Ptychodus04 Posted March 22, 2017 Share Posted March 22, 2017 1 hour ago, paulgdls said: Hi DILUTE PVA wood glue (10:1 by volume, diluted using water) brushed on repeatedly as it SLOWLY dries out. I've conserved many tusk sections using this method and IT WORKS. Once the specimen has completely dried out paraloid or similar can be used to further stabilize and conserve it. Paul It is not generally recommended to use PVA based commercial glues as a consolidant due to the additives that they contain. Over time, they become VERY problematic. If you can't control the drying process and are forced to consolidate a wet specimen, you should make your own PVA emulsion. This is very easy. First, I have to say, consolidating a dry specimen with a PVA solution using the controlled drying method is much preferred over emulsion due to the fact that emulsions are hard to reverse. To make a PVA emulsion: Fill a glass container with cool water. Slowly add PVA beads to the water while stirring to wet all the PVA (be sure to break up clumps before they go into the water and try to keep clumps from forming while adding the PVA Put the glass container on your kitchen range and begin heating until the water almost boils (190-210F) while continually stirring. Once the emulsion is the consistency you desire, allow to cool. You can add cool water to cool emulsion to thin it if needed. Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
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