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Found 1,033 results

  1. Penn Bela

    Well I was fortunate to have the opportunity to collect with my fossil friend DevonianDigger and two others last week at Penn Dixie for a few hours. We probably moved about a ton of rock and who knows how much overburden. Jay was kind enough to share what he thought might be a promising spot even though he could only stay with us till noon. We pretty much had the site to ourselves so I was able to use the saw which helped us a lot in freeing out large blocks from the trilobite bearing layer. We got quite muddy as the water level at the site was fairly high. We in fact spent some time creating a drainage ditch to clear out the water from where we were digging. Between us we probably took out 60 potentially complete eldredgeops and perhaps 4 or 5 greenops and this little guy that I started to prep this morning. I knew this one had damage as the bug was in both the positive and the negative of the split. I was pretty sure in the field that it was not a greenops. I also have two presumed greenops I also found that are currently in glue up waiting prep. The prep starts out by reuniting the top and the bottom halves of the bug with cyanoacrylate glue that is clamped for 24 hours. Resist the urge to prep right away the glue bonds better if you let it cure 24 hours. Here is the first picture that I took just as the top of the eye is becoming exposed. Notice how I cut out the top piece and joined it to the bottom piece. You want to leave as little matrix on the top section as you can get away with because you do have to take it all of during the prep process. Here we are a little bit further. There is minimal scribe work being done it is all being done with 40 micron dolomite and a .015 COMCO nozzle on a COMCO MB1000 air abrasion unit at about 30 PSI. If I were to do much if any scribe work I would risk vibrating the glue bond loose and it would never glue back properly a 2nd time. Your first attempt at a join is always the best. Unfortunately I can already tell that there is some skin missing on the cephalon and that one of the genal spines is not there. After a bit more work So is it a greenops or a belacartwrightia More to come as the prep continues not counting gluing time we have about an hour invested in this bug. It is not a flawless bug by any means but is likely to be my first confirmed bela from Penn Dixie... I have prepped a couple of Bela's from there including a Fossil of the month here on the Forum ... but alas they were not mine......
  2. The Classic by Nigel Hughes: "Lament for the passing of the Trilobites" Oh, look, what can this be, swimming all over the Cambrian sea? Is it Spriqqina?, no, it cannot be, some new and strange innovation maybe. Come, hear the tale of the Trilobites days, niches exploited in so many ways! Where did they come from and where did they go? I've just spent three years and I still do not know. Paradoxides is not what it seems, more or less segments, who knows what that means? Trilobite workers in such consternation, intraspecific phenotypic variation. Phacopids with their schizochroal eyes more or less lenses, was that really wise? Natural selection it made the decision, advantages reaped from peripheral vision. So why did these marvelous creatures decline? Was it meteorite impacts or just too much wine? Was it drying of oceans on Pangea's shores? Was it natural progression of one of Cope's laws? Alas! It seems there's no end to debate to the ultimate cause which determined their fate, for Trilobite workers would be out of a job, so if you discover, Just Keep shut your gob! That was the tale of the Trilobites days, and the niches exploited in so many ways! Where did they come from and where did they go? I'll spend all my life and I'll still never know!
  3. Trilobite of Russia

    It has suffered from its fossilization and is a little crushed, but it's a rare one.
  4. Fern? (Update: Triarthrus beckii)

    Found this on a Lake Champlain beach, looks like a fern but any info would be great!
  5. I'm suspicious of the colour changes, but maybe someone who knows about fake trilobites could weigh in.
  6. Asaphus intermedius

    From the album Trilobites

  7. Asaphus raniceps

    From the album Trilobites

  8. Zacanthoides ?typicalis

    From the album Trilobites

  9. Piochaspis sellata

    From the album Trilobites

  10. Ptychagnostus occultatus

    From the album Trilobites

  11. Asaphus lepidurus

    From the album Trilobites

    Self-prepared.
  12. Itagnostus interstrictus

    From the album Trilobites

  13. Bolaspidella housensis

    From the album Trilobites

  14. Asaphus kotlukovi

    From the album Trilobites

  15. Asaphus cornutus

    From the album Trilobites

  16. Ceratarges sp. nov.

    From the album Trilobites

  17. Ellipsocephalus hoffi

    From the album Trilobites

  18. Asaphus latus

    From the album Trilobites

  19. Delphasaphus delphinus

    From the album Trilobites

  20. Illaenus oblongata

    From the album Trilobites

  21. Asaphus expansus robustus

    From the album Trilobites

  22. Asaphus holmi

    From the album Trilobites

  23. Asaphus punctatus

    From the album Trilobites

  24. Asaphus plautini

    From the album Trilobites

  25. Asaphus punctatus

    From the album Trilobites

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