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9 results for “Oxfordian”
Data Accompanying "Dynamics of Water Absorption in Callovo-Oxfordian Claystone Revealed With Multimodal X-Ray and Neutron Tomography"
<p>These are the datasets analysed in the publication "Dynamics of Water Absorption in<br> Callovo-Oxfordian Claystone Revealed With Multimodal X-Ray and Neutron Tomography" by Stavropoulou <em>et al.</em> in 2020 in Frontiers in Earth Science, DOI: <a href="https://doi.org/10.3389/feart.2020.00006">https://doi.org/10.3389/feart.2020.00006</a></p> <ol> <li>File 1 contains the 3D reconstructed x-ray and neutron tomography volumes analysed in the paper. State 002 is taken as a reference and the greylevels of all images in the times series for both x-ray and neutrons are rescaled using two characteristic image features (top-cap and air in the case of x-rays) linearly to align with 002. Neutron volumes are rescaled to the same pixel size as 2-bin x-ray volumes, and a mean registration is applied to align neutrons with x-rays.<br> Furthermore, a bilateral filter is applied to the neutron tomographies (domain sigma = 1, range sigma=3000).<br> Full scale images are available at <a href="https://doi.ill.fr/10.5291/ILL-DATA.UGA-42">https://doi.ill.fr/10.5291/ILL-DATA.UGA-42</a><br> </li> <li>File 2 contains the joint histograms for registered pairs of images, as visible in Figure 4 and Figure 5.<br> </li> <li>File 3 contains the results of the digital volume correlation performed with the <a href="https://ttk.gricad-pages.univ-grenoble-alpes.fr/spam/intro.html">spam</a> tookit.<br> The overall "registration" is used to create Figure 6<br> The global correlations available in "gdic" are used to create Figures 7, 8 and 9.</li> </ol>
FIGURE 2 in Three new species of the genus Tanidromites (Decapoda: Brachyura: Tanidromitidae) from the Late Jurassic (Oxfordian) of Poland
FIGURE 2. Anterior part of the carapace and the augenrest in Tanidromites spp. The area of augenrest is shaded.
FIGURE 5. Tanidromites schweitzerae n in Three new species of the genus Tanidromites (Decapoda: Brachyura: Tanidromitidae) from the Late Jurassic (Oxfordian) of Poland
FIGURE 5. Tanidromites schweitzerae n. sp. 1, holotype (#4515, Niegowonice); 2, specimen (#4562, Niegownice); 3, lateral view (#4562, Niegowonice); 4, rostrum (holotype #4515, Niegowonice); 5, augenrest, view from above (holotype #4515, Niegowonice); 6, specimen (#6249, Niegowonice). Scale bars equal 1 mm.
FIGURE 4. Tanidromites wysokaensis n in Three new species of the genus Tanidromites (Decapoda: Brachyura: Tanidromitidae) from the Late Jurassic (Oxfordian) of Poland
FIGURE 4. Tanidromites wysokaensis n. sp. 1, paratype (#6260, Ogrodzieniec); 2, holotype (#6240, Ogrodzieniec); 3, paratype (#6263, Niegowonice); 4, anterior part of the carapace (paratype, #6263, Niegowonice); 5, lateral view (#6240, Ogrodzieniec); 6, 7, augenrest, anterior view (6 – #6263, Niegowonice; 7 – #6240, Ogrodzieniec); 8, anterior part of the carapace (holotype, #6240, Ogrodzieniec). ht – hepatic tubercle. Scale bars equal 1 mm.
FIGURE 3. Tanidromites longinosa n in Three new species of the genus Tanidromites (Decapoda: Brachyura: Tanidromitidae) from the Late Jurassic (Oxfordian) of Poland
FIGURE 3. Tanidromites longinosa n. sp. 1, paratype (#6239, Ogrodzieniec) (cp – cervical pit); 2, specimen (#6242, Ogrodzieniec); 3, 4, upper orbital margin (3 – #2725 Bzów; 4 – #1908, Bzów); 5, 6, augenrest, anterior view (5 – #6302, Kroczyce; 6 – #1908, Bzów); 7, lateral view (#6238, Kroczyce); 8, holotype (#6307, Ogrodzieniec). Scale bars equal 1 mm.
FIGURE 1. Analyzed measurements and a in Three new species of the genus Tanidromites (Decapoda: Brachyura: Tanidromitidae) from the Late Jurassic (Oxfordian) of Poland
FIGURE 1. Analyzed measurements and a groundplan of the morphological structures in the species of Tanidromites on the example of T. alexandrae (after Starzyk, 2015a, figure 1). Further explanation in text (ag – anterior groove, hp – hepatic pit, ht – hepatic tubercle, cp – cervical pit). Abbreviations for the measurements are in the Material and Methods.
Data from: The oldest turritelline gastropods: from the Oxfordian (Upper Jurassic) of Kutch, India
Turritellid gastropods are important components of many Cretaceous-Recent fossil marine faunas worldwide. Their shell is morphologically simple, making homoplasy widespread and phylogenetic analysis difficult, but fossil and living species can be recognized based on shell characters. For many decades, it has been the consensus that the oldest definite representatives of Turritellidae are from the lower Cretaceous, and that pre-Cretaceous forms are homeomorphs. Some morphological characters of the present turritelline species resemble those of mathildoids, but many diagnostic characters clearly separate these two groups. We here describe and/or redescribe – based on examination of more than 1800 near complete specimens -- four species from the Upper Jurassic Dhosa Oolite Member of the Chari Formation in Kutch, western India, and demonstrate that they are members of Turritellidae, subfamily Turritellinae, on the basis of diagnostic characters including apical sculptural ontogeny (obtained from SEM study), spiral sculpture, and growth line patterns. The four species are in order of abundance, Turritella jadavpuriensis Mitra and Ghosh, 1979; Turritella amitava new species; Turritella jhuraensis Mitra and Ghosh, 1979 and Turritella dhosaensis new species. The turritelline assemblages occur only on the northeastern flank of the Jhura dome (23°24'47.57"N, 69°36'09.26"E). Age of the Dhosa Oolite has recently been confirmed based on multiple ammonite species. All these points indicate that these fossils are the oldest record of the family Turritellidae – by almost 30 million years – in the world.
Data from: The oldest turritelline gastropods: from the Oxfordian (Upper Jurassic) of Kutch, India
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Paleoecology of naticid-molluscan prey interaction during the Late Jurassic (Oxfordian) in Kutch, India: Evolutionary implications
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