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Showing results for tags 'phosphorescence'.
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Tiger Mountain Amber (Tukwila Fm./Renton Fm. [Boundary], Middle to Late Eocene)
Barrelcactusaddict posted a gallery image in Member Collections
From the album: Fossil Amber and Copal: Worldwide Localities
- Subjects: Three exceptional specimens of amber, recovered from exposures on Tiger Mountain, Washington State; this is the second of two videos detailing the specimens' natural fluorescent and phosphorescent responses: longwave UV light (Convoy S2 flashlight) was used in this entry. All were prepared by hand using a diamond needle file, 240 to 3,000 grit SiC sandpaper, and chromium oxide (ZAM compound) on a Selvyt microfiber cloth. - Amber's Source Formations and Age: The amber-bearing coal contained within the the Tiger Mountain, Tukwila, and Renton Formations spans a geologic timescale ranging from Middle to Late Eocene in age (~41.3-33.9 Ma). - About Amber Phosphorescence: Phosphorescence is the noticeably-extended emission of radiation from an illuminated subject, after the source of illumination has been removed; the atoms of certain hydrocarbons within the amber, when irradiated by high intensity UV wavelengths (LED or dedicated UV light sources), achieve a higher energy or "excited" state; the rotation of atoms becomes the opposite of their rotation in their grounded "non-excited" state, allowing for a longer release of radiation (light). The light emitted in fluorescence and phosphorescence is always a longer wavelength than the source of illumination. *Regrettably, my camera could not record the full duration of the phosphorescence of these specimens, or all other specimens (Chiapas, Sumatra, Baltic, Claiborne, Dominican), for that matter; multiple tests on all three Tiger Mountain specimens showed an average response of nearly 8 seconds, after 4 seconds of sustained direct illumination. These results are comparable to that of the Chiapas amber specimen from one of my previous videos. Source: https://file.dnr.wa.gov/publications/ger_ri21_strat_eocene_king_co.pdf© Kaegen Lau
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Teeth from Ernst Quarry exhibit phosphorescence under long wave uv light (short video)
Kurt Komoda posted a topic in General Fossil Discussion
Hello, all! I see that there are already a few threads concerning the fluorescent or phosphorescent properties of some fossil, but I thought I'd share a video I took today. I just received a Convoy C8+ long wave 365nm UV flashlight, and so, naturally, I was going around the apartment to see just how disgusting my kitchen and bathroom look when revealed under long wave UV light, but also to take a look at the various rocks and fossils I've collected over the years. I was surprised to find that the teeth from Ernst Quarry, in Bakersfield, all fluoresce a light orange color- like cantaloupe- but even more surprised to see that they glowed briefly after removing the UV light. The video does not show the orange fluorescence- I don't know much about this, but it was just quickly shot with an iPhone 11 and would probably need some sort of lens filter to display what I saw- and the brief flare up you see when removing the UV light is just the iPhone trying to adjust for the change in lighting. I dunno, I thought this was pretty neat. I have a short wave UV field lamp on order, and that will produce different results, as a much lower amount of minerals fluoresce under long wave. What mineral are the Bakersfield teeth comprised of? 818431889_bakersfieldteethconvoyc8test.mp4- 6 replies
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