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Found 14 results

  1. Why I Love Blacklight!

    Whenever I bring home a new batch of fossils, I pull out my UV rock lamp. Why? Some fossils glow in the dark, but not in a uniform way. Variations in the mineral composition make for a variety of colors, even when the specimen seems fairly uniform in color in daylight. This can make small, hidden details really stand out. Case in point: This afternoon I was putting away some petrified wood I'd collected awhile back. I pulled out my black light to examine them because some of the wood from this site shows a rainbow of color under UV. This one particular piece was mostly orange under UV, though in camera the hues look different. What really got my attention, however, were a few really vibrant spots on one side. Insect traces! The petrified wood chip is only about 8 cm long. Even with a magnifier, some of the small details are hard to spot. I never would have spotted them in daylight, but they were super bright with the UV. Another box I was sorting through this week contained impressions of brachiopods and trilobites in plain, white limestone. It can be hard to see the contours in the matrix, but they show up much differently under the UV. Finally, UV light can be used to identify fossil mollusks whose patterns have bleached away. About 60% of fossil shells fluoresce and some species have been described based on the residual patterns made visible under ultraviolet light. Note: To photograph these, I used a Convoy UV LED flashlight. I set my camera on a tripod for a 4 second exposure at f/22, with ISO set to 1600. I had my DSLR's white balance set for daylight.
  2. Mosasaur Scales Exposed Under UV Light

    I'm working on a really excellent mosasaur skull right now! I also read a 2014 publication by Johan Lindgren , Michael Caldwell, Takuya Konishi , and Luis Chiappe. In Convergent Evolution in Aquatic Tetrapods: Insights from an Exceptional Fossil Mosasaur they reveal some of the amazing details preserved on the famous Bonner Platecarpus specimen at LACM (LACM 128319) seen here: Like the LACM specimen, my new skull seems to have the same sort of differential phosphatization / preservation (?) of the scale pattern. Here is a figure from the article: Here are a few pictures of the parietal on the skull I am working on now: I promise I will share more pictures as the prep of this specimen continues! Until then, Merry Christmas! -KS
  3. Flourescent Fossil Clam

    From the album Fossil Flourescence

    Stewartia formani viewed under natural light at left and under short-wave ultraviolet light at right.

    © c. 2017 Heather J. M. Siple

  4. Flourescent Fossil Clam

    From the album Fossil Flourescence

    Stewartia anodonta clam viewed under natural light at left and under short-wave ultraviolet light at right.

    © c. 2017 Heather J M Siple

  5. Flourescent Fossil Clam

    From the album Fossil Flourescence

    Stewartia formani clam viewed under natural light at left and under short-wave ultraviolet light at right.

    © c. 2017 Heather J M Siple

  6. Flourescent Fossil Clam

    From the album Fossil Flourescence

    Stewartia anodonta viewed under natural light at left and under short-wave ultraviolet light at right.

    © c. 2017 Heather J M Siple

  7. Flourescent Fossil Clam

    From the album Fossil Flourescence

    A clam shell of the family Veneridae viewed under natural light at left and under short-wave ultraviolet light at right.

    © c. 2017 Heather J M Siple

  8. Flourescent Fossil Volute Snail

    From the album Fossil Flourescence

    A volute shell, Scaphella sp., viewed under natural light at left and under short-wave ultraviolet light at right.

    © c. 2017 Heather J M Siple

  9. Flourescent Fossil Oyster

    From the album Fossil Flourescence

    Pycnodonte mutabilis, viewed under natural light at left and under short-wave ultraviolet light at right.

    © c. 2017 Heather J M Siple

  10. Flourescent Fossil Gastropod

    From the album Fossil Flourescence

    A gastropod shell of the family Olividae viewed under natural light at left and under short-wave ultraviolet light at right.

    © c. 2017 Heather J M Siple

  11. Flourescent Fossil Clam

    From the album Fossil Flourescence

    Mercenaria cuneata, viewed under natural light at left and under short-wave ultraviolet light at right.

    © C. 2017 Heather J M Siple

  12. Flourescent Fossil Olive Shell

    From the album Fossil Flourescence

    A gastropod shell of the family Olividae viewed under natural light at left and under short-wave ultraviolet light at right.

    © c. 2017 Heather J M Siple

  13. Flourescent Fossil Whelk

    From the album Fossil Flourescence

    A whelk shell of the family Busyconidae viewed under natural light at left and under short-wave ultraviolet light at right.

    © c 2017 Heather J M Siple

  14. Thanks to piranha, I believe these bugs are Asaphus Punctatus. Now I'm trying to determine the % of repair. I photographed them while under UV light. They look pretty good to me. Just guessing, I'd say about 5% (total guess). I'd greatly appreciate any opinions on the % of repair (or on any other matters)! The cystoid was definitely added to the plate. I'm a total novice when it comes to fossils. I bought a large collection and am learning as I go. Thanks in advance!!
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