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17 results for “fossil resin”
FIGURE 2 in Pushing the limits of neutron tomography in palaeontology: Three-dimensional modelling of in situ resin within fossil plants
FIGURE 2. Austrosequoia novae-zeelandiae (Ettingshausen, 1887) Mays et al., 2017, PL1227. 1) Transverse section of a partially exposed, desiccated ovulate cone. 2) Neutron tomographic reconstruction largely encapsulated in sedimentary matrix, white indicates high neutron attenuation, oblique-transverse view. 3) Volume rendering of neutron tomographic reconstruction, RNA = Relative Neutron Attenuation, grid texture on RNA spectrum indicates relative transparency, regions of highest neutron attenuation represent in situ resin within cone axis and minor enclaves of resin near the distal ends of the bract-scale complexes, desiccation exhibited by large gaps in coalified organic remains (blue/green), oblique-transverse view. 4) Greyscale histogram from neutron tomographic reconstruction of PL1227 (16-bit) these values represent the neutron attenuation of the reconstructed volume, colours and transparency textures as per Figure 2.3, threshold values presented in Table 2, the spectrum has been cropped at the extremes for this graphical representation. See Appendix for an animation of the virtually extracted specimen illustrated in Figure 2.3.
FIGURE 1. 1 in Pushing the limits of neutron tomography in palaeontology: Three-dimensional modelling of in situ resin within fossil plants
FIGURE 1. 1) Map of eastern Zealandia including New Zealand and the Chatham Islands, grey areas = emergent, grey outline = 2000 m isobath, boxed area is displayed in Figure 1.2. 2) Map of the Chatham Islands, grey areas = emergent, boxed area is displayed in Figure 1.3. 3) Geological map of the Waihere Bay area, northwest Pitt Island, fossil locality recorded in this study is indicated, age estimates from the following sources: Tupuangi Formation (Mildenhall, 1994; Mays and Stilwell, 2013), Kahuitara Tuff (Mildenhall, 1994; Stilwell, 1998), other estimates (Campbell et al., 1993; Panter et al., 2006). Modified from figures 1 and 3 of Mays et al. (2015b) with permission.
FIGURE 3 in Pushing the limits of neutron tomography in palaeontology: Three-dimensional modelling of in situ resin within fossil plants
FIGURE 3. Artist's reconstruction of ovuliferous cone and fertile shoot of Austrosequoia novae-zeelandiae (Ettingshausen, 1887) Mays et al., 2017, artist: Mali Moir.
FIGURE 1 in Challenges encountered during acid resin transfer preparation of fossil fish from Monte Bolca, Italy
FIGURE 1. Fourier-Transform Infrared spectrograph of the three existing polymers. Wavenumber refers to the wavelength of light and % Transmission refers to the amount of each wavelength that is transmitted through the sample. These are the parameters measured by the spectrometer to achieve an infra-red spectrum. Each peak is indicative of a different chemical bond and different substances will produce distinct patterns.
FIGURE 3. 1 in Challenges encountered during acid resin transfer preparation of fossil fish from Monte Bolca, Italy
FIGURE 3. 1, Yellowed resin shows dimpled (etched) surface. A glass plate has been added to enhance clarity. 2, Yellowed resin displaying severe cracking and near opacity.
FIGURE 2 in Challenges encountered during acid resin transfer preparation of fossil fish from Monte Bolca, Italy
FIGURE 2. Specimen NHMUK PV P1990 during preparation. 1, the block split into halves, showing mortar. 2, The underside of the block set in resin, the majority of the matrix has been removed mechanically. 3, The top of the block, with the exposed fossil, embedded in resin.
FIGURE 1 in Variation in the Deterioration of Fossil Resins and Implications for the Conservation of Fossils in Amber
FIGURE 1. Historical deterioration of amber pieces in the AMNH collections: A. Crazing of several old Baltic amber specimens. B. Old Baltic amber piece with insect exhibiting "darkening." C. Same specimen after repolishing. D. "Darkening" of several old Baltic amber specimens. E. Same specimens after repolishing. F. Old Baltic amber piece showing overall deterioration including crazing and large crack through the insect inclusion. G. Same piece after embedding in a high-grade epoxy (EpoTek 301-2).
FIGURE 4 in Variation in the Deterioration of Fossil Resins and Implications for the Conservation of Fossils in Amber
FIGURE 4. Crazing after exposure to a combination of UV/Vis and fluctuating humidity. A. New Jersey sample prior to treatment (size of all samples: 1.5 cm × 1.25 cm × 3 mm). B. New Jersey sample after treatment. C. Detail of crazing on New Jersey sample. D. Burmese sample prior to treatment. E. Burmese sample after treatment. F. Detail of crazing on Burmese sample.
FIGURE 7 in Variation in the Deterioration of Fossil Resins and Implications for the Conservation of Fossils in Amber
FIGURE 7. Images showing effects of heat on amber samples. A. Baltic sample prior to treatment. B. Yellowing of Baltic sample due to heat exposure. C. Burmese sample prior to treatment. D. No discernible yellowing of Burmese sample after heat exposure.
FIGURE 4 in Challenges encountered during acid resin transfer preparation of fossil fish from Monte Bolca, Italy
FIGURE 4. NHMUK PV P1990 after complete preparation.
FIGURE 5 in Challenges encountered during acid resin transfer preparation of fossil fish from Monte Bolca, Italy
FIGURE 5. Oxford University Museum specimen CM4312 Blochius longirostris, set in Synolite 0328-A-1.
FIGURE 6 in Variation in the Deterioration of Fossil Resins and Implications for the Conservation of Fossils in Amber
FIGURE 6. Yellowing of the five resins following heat aging, based on change in CIELab values.
FIGURES 7–10. Orchesia rasnitzyni Nikitsky. 7 in A new species of the genus Orchesia Latreille (Coleoptera: Melandryidae) from Baltic amber with a key to species described from fossil resins
FIGURES 7–10. Orchesia rasnitzyni Nikitsky. 7) specimen No. 882-4 [CCHH], habitus, ventro-lateral view; 8) specimen No. 016 [CAB], habitus, ventro-lateral view; 9–10) specimen No. 1777 [CAG]. Not reproduced to the same scale.
FIGURES 1–4 in A new species of the genus Orchesia Latreille (Coleoptera: Melandryidae) from Baltic amber with a key to species described from fossil resins
FIGURES 1–4. Orchesia canaliculata sp. nov., holotype. 1) habitus, dorso-lateral view; 2) habitus, lateral view; 3) habitus, dorsal view; 4) details of abdomen, matathorax and elytra, lateral view. Scale bar – 1 mm.
FIGURES 5–6 in A new species of the genus Orchesia Latreille (Coleoptera: Melandryidae) from Baltic amber with a key to species described from fossil resins
FIGURES 5–6. Orchesia canaliculata sp. nov., holotype. 5) head, frontal view (reconstruction); 6) hind leg (reconstruction).
FIGURES 1–2 in TwonewfossilspeciesofthegenusAtomariaStephens (Coleoptera:Cryptophagidae) from Eocene European amber with a key to species described from fossil resins
FIGURES 1–2. Atomaria (Anchicera) alekseevi sp. nov., holotype, No 6831 [MAIG]: 1—habitus, dorsal view; 2—habitus, ventral view. Scale bar = 0.25 mm.
FIGURES 3–4 in TwonewfossilspeciesofthegenusAtomariaStephens (Coleoptera:Cryptophagidae) from Eocene European amber with a key to species described from fossil resins
FIGURES 3–4. Atomaria (Anchicera) perkovskyi sp. nov., No 6832 [MAIG]: 3—habitus, dorsal view; 4—habitus, ventrolateral view. Scale bar = 0.25 mm.
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International Brain Laboratory public data
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OpenNeuro
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