Malcolmt Posted May 13, 2016 Share Posted May 13, 2016 (edited) Here is an extremely rare association of a pretty much complete Ceraurus globulobatus trilobite and a ventral partial amecystite echinoderm from the Verulam formation of the Brechin area in Ontario , Canada. Over the next month or so I will be taking a number of forum members and clubs to this area to hunt. Hopefully there will be some nice finds that we can share. This specimen was found by splitting rock at the end of April 2016. We tend to find the best specimens at this locality by splitting rock. the shaley limestone does not weather well once exposed to the elements.The preservation observed is quite typical of the ceraurus from this locality. The exoskeleton is extremely thin and flakey. The preparation was done mostly with very low pressure (8-10 PSI) 320 mesh dolomite . Prep time was about 5 hours over quite a number of days. Some dilute vinac was used to help consolidate the exoskeleton which was just screaming to want to flake off. This is the only time I have ever found an amecystite associated with a complete ceraurus. They are both rare finds in their own right. Edited May 13, 2016 by Malcolmt 1 Link to comment Share on other sites More sharing options...
Malcolmt Posted May 13, 2016 Author Share Posted May 13, 2016 Here is the Ceraurus Link to comment Share on other sites More sharing options...
Malcolmt Posted May 13, 2016 Author Share Posted May 13, 2016 (edited) Here is the amecystite, (ventral view, it is upside down) Edited May 13, 2016 by Malcolmt Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 13, 2016 Share Posted May 13, 2016 Wow! Very cool association, Malcolm! Thanks for posting it. Excellent prep, as usual. Regards, Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Carl Posted May 13, 2016 Share Posted May 13, 2016 Incredible! Congrats! Link to comment Share on other sites More sharing options...
hrguy54 Posted May 13, 2016 Share Posted May 13, 2016 Very nice piece. Well prepped. Link to comment Share on other sites More sharing options...
JimB88 Posted May 13, 2016 Share Posted May 13, 2016 whoa..thats a nice specimen of both of those! Link to comment Share on other sites More sharing options...
old bones Posted May 13, 2016 Share Posted May 13, 2016 They are beautiful! Wonderful details. Link to comment Share on other sites More sharing options...
snakebite6769 Posted May 14, 2016 Share Posted May 14, 2016 Fantastic find and prep! Thanks for sharing Link to comment Share on other sites More sharing options...
Jeffrey P Posted May 14, 2016 Share Posted May 14, 2016 Wow, those are some awesome specimens, and together on the same piece, truly awesome. Congratulations Malcolm on the find and the exisite prep job. Thanks for posting. Link to comment Share on other sites More sharing options...
California Dave Posted May 14, 2016 Share Posted May 14, 2016 Would love to be on one of those trips. Pretty low psi but I guess the matrix could handle it. The dolomite worked great! Link to comment Share on other sites More sharing options...
Ludwigia Posted May 14, 2016 Share Posted May 14, 2016 Nice work, Malcolm. And great association! Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
JustPlainPetrified Posted May 14, 2016 Share Posted May 14, 2016 I like it A LOT! Nice work. Link to comment Share on other sites More sharing options...
njfossilhunter Posted May 16, 2016 Share Posted May 16, 2016 Congrats....That is a wonderful specimen. I have yet to do some trilobite funding ...seeing your find makes me want to jump into my car and head north. TonyThe Brooks Are Like A Box Of Chocolates,,,, You Never Know What You'll Find. I Told You I Don't Have Alzheimer's.....I Have Sometimers. Some Times I Remember And Some Times I Forget.... I Mostly Forget. Link to comment Share on other sites More sharing options...
Troodon Posted May 16, 2016 Share Posted May 16, 2016 Just a beautiful find Link to comment Share on other sites More sharing options...
Scylla Posted May 16, 2016 Share Posted May 16, 2016 FOTM worthy. Do you have a before pic? Link to comment Share on other sites More sharing options...
Malcolmt Posted May 16, 2016 Author Share Posted May 16, 2016 Unfortunately did not take one , when you get right down to it I am not a real photography aficionado so I tend to take way to few pictures. Since I won a FOTM in the past I have tended not to enter even when I have a pretty decent plate. Link to comment Share on other sites More sharing options...
ranitomeya Posted May 17, 2016 Share Posted May 17, 2016 Extremely impressive. What abrasive unit are you using for this fine work? Glad to see all of these finds from Ontario, thanks for sharing it! mark Link to comment Share on other sites More sharing options...
Malcolmt Posted May 17, 2016 Author Share Posted May 17, 2016 The abrasive unit is a COMCO MB1000 using a combination of COMCO .015, .018 and .030 high precision abrasive nozzles and dolomite that passes through a 325 mesh screen. (extremely fine like talc). All prep is done under a Olympus Stereo zoom scope. Link to comment Share on other sites More sharing options...
ranitomeya Posted May 17, 2016 Share Posted May 17, 2016 Malcolm, thanks so much for the quick and thorough response, I appreciate it! Link to comment Share on other sites More sharing options...
Darktooth Posted May 17, 2016 Share Posted May 17, 2016 Very nice specimen! I am curious, what is the size of that? I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
Malcolmt Posted May 17, 2016 Author Share Posted May 17, 2016 The ceraurus is 38mm long (tip to end of tail) by 21.5 mm in width Link to comment Share on other sites More sharing options...
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