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1,260 results for “Devonian”
Data for "Lithium isotope evidence shows Devonian afforestation may have significantly altered the global silicate weathering regime"
<p>This contains measured data for paper "Lithium isotope evidence shows Devonian afforestation may have significantly altered the global silicate weathering regime", under funding of ERC grant 682760 CONTROLPASTCO2. </p> <p>This consists all the Li isotope data obtained from brachiopods/bulk carbonate samples.</p>
High-resolution basin-wide correlations with dynamic time-warping: code and data for a case study from the Usseln Limestone (Late Devonian, Rhenish Massif, Germany)
<p>This dataset accompanies the manuscript of Wichern et al. (GRL, 2024), entitled "Decoding Deep-Time Rhythms: Probing the limit of Stratigraphic Correlation in the Usseln Limestone's (Late Devonian) Time-Specific Facies". It contains both datasets and code. </p> <p>The dataset concerns samples collected from the Usseln Limestone, a rock unit that underlies the Late Devonian Kellwasser Crisis deposits in the Rhenish Massif, western Germany. The data consists of high-resolution thin-section composite photos, as well as micro-XRF scanning data (both maps and depth records) for three localities. The code contains the workflow to structure and plot the micro-XRF maps and convert them to depth records, as well as the workflow to analyse these depth records using dynamic time warping. Further analytical details can be found in the supporting material of the associated manuscript.</p>
FIG. 2. — Asterolepis alticristata n in Asterolepis alticristata n. sp. (Antiarchi) from the Upper Devonian (Frasnian) of Nunavut, Canada, and a report on the antiarch diversity of the Fram Formation
FIG. 2. — Asterolepis alticristata n. sp., NUFV 897, holotype, anterior median dorsal plate in visceral (A, photograph; A', labeled illustration), cranial (B), left lateral (C), and dermal (D) views. Abbreviations: cd.PMD, area overlapped by the posterior median dorsal plate; cv.ADL, area overlapping the anterior dorsolateral plate; cv.Mxl, area overlapping the mixilateral plate; lc, lateral corner; op.r oblique posterolateral ridge. Scale bar: 5 cm.
FIG. 4 in Juvenile eucladid crinoid from the Middle Devonian of Turkey
FIG. 4. — Plate diagram of Dendrocrinidae? gen., sp. indet. Black, radial plates; grey, matrix; Scale bar: 1.0 mm.
FIG. 5 in Trophic position of some Late Devonian-Carboniferous (Mississippian) conodonts revealed on carbon organic matter isotope signatures: a case study of the East European basin
FIG. 5. — δ13Cdistribution along the facies profile plotted for dominating taxa (latest Famennian-middle Tournaisian; Kamenka River section org
FIG. 3 in Trophic position of some Late Devonian-Carboniferous (Mississippian) conodonts revealed on carbon organic matter isotope signatures: a case study of the East European basin
FIG. 3. — Distribution of δ13Cvalues among conodonts having different morphological types of P1 elements. Scale bar: 0.1 mm. org
FIG. 2 in Trophic position of some Late Devonian-Carboniferous (Mississippian) conodonts revealed on carbon organic matter isotope signatures: a case study of the East European basin
FIG. 2. — Lithology, biostratigraphy, and facies distribution of the Kamenka River section (Pechora Craton). Legend: 1, limestone; 2, clayey limestone; 3, clay; 4, cherty nodules; 5, flat lamination; 6, wavy lamination.
FIG. 1 in Trophic position of some Late Devonian-Carboniferous (Mississippian) conodonts revealed on carbon organic matter isotope signatures: a case study of the East European basin
FIG. 1. — Localization of the sites under consideration: A, Generalized map of Eastern Europe; rectangles mark the localities: 1, Pechora Craton; 2, Voronezh Anteclise (Kamenka Quarry and Russkiy Brod Quarry sections); 3, Ilmen Lake region (Chudovo section, Syas River section, Ilmen Lake borehole 8, Ilmen Lake section); 4, Chimbulat Quarry. B, Map of Pechora Craton; C, Scheme of outcrops' position in the Kozhva River basin.
Data from: The smallest known Devonian tetrapod shows unexpectedly derived features, Part 2 of 2
<p>A new genus and species of Devonian tetrapod, <i>Brittagnathus minutus</i> gen. et sp. nov., is described from a single complete right lower jaw ramus recovered from the <i>Acanthostega</i> mass-death deposit in the upper part of the Britta Dal Formation (upper Famennian) of Stensiö Bjerg, Gauss Peninsula, East Greenland. Visualisation by propagation phase contrast synchrotron microtomography (PPC-SRμCT) allows a complete digital dissection of the specimen. With a total jaw ramus length of 44.8 mm, <i>Brittagnathus</i> is by far the smallest Devonian tetrapod described to date. It differs from all previously knownDevonian tetrapods in having only a fang pair without a tooth row on the anterior coronoid, and a large posterior process on the posterior coronoid. The presence of an incipient surangular crest and a concave prearticular margin to the adductor fossa together cause the fossa to face somewhat mesially, reminiscent of the condition in Carboniferous tetrapods. A phylogenetic analysis places <i>Brittagnathus</i> crownward to other Devonian tetrapods, adjacent to the Tournaisian genus <i>Pederpes</i>. Together with other recent discoveries, it suggests that diversification of 'Carboniferous-grade' tetrapods had already begun before the end of the Devonian and that the group was not greatly affected by the end-Devonian mass extinction.</p>
FIG. 2 in A revised heterostracan-based ichthyostratigraphy of the Wood Bay Formation (Lower Devonian, Spitsbergen), and correlation with Russian Arctic archipelagos
FIG. 2. — Stratigraphical section of the Andrée Land Block of northern Spitsbergen, after Harland (1997) and Blomeier et al. (2003a). Ages after Blieck et al. (2000, 2002) and McCann (2000). Note that: 1) it is common to subdivide the lowermost part of the Red Bay Group into Wulffberget, Rabotdalen (locally present) and Princesse Alicefjellet formations instead of only the Rivieratoppen Formation, according to Murashov & Mokin (1976, 1979) – this subdivision being applicable throughout the Devonian of northern Spitsbergen (Blomeier et al. 2003a, b); and 2) the Grey Hoek and Wijde Bay formations are considered as lateral equivalents and Eifelian in age by Schweitzer (1999); however, Schweitzer's idea that the Grey Hoek and Wijde Bay formations are of equal age is certainly not true along Wijdefjorden, where one lies on top of the other with a depositional boundary; upper parts of the Grey Hoek Formation in the Woodfjorden area may be coeval with the Wijde Bay Formation farther east (Blomeier et al. 2003a, b; W. Dallmann, pers. comm. 2007).
Fig. 5 in A New Middle Devonian Arthrodire (Placoderm Fish) from the Broken River Area, Queensland
Fig. 5. Brachythoracid trunk armour restorations. (A,B) Taemasosteus (Early Devonian, Burrinjuck, NSW). (A) Posterior view of skull (from White, 1978: fig. 79); (B) anterior view of trunk armour, restored from individual bones, using Harrytoombsia as a model, as illustrated by Miles & Dennis (1979: fig. 9). (C) Confractamnis johnjelli n.gen. and n.sp.; trunk armour restoration, anterior view, based on Taemasosteus and Harrytoombsia.
Fig. 4 in A New Middle Devonian Arthrodire (Placoderm Fish) from the Broken River Area, Queensland
Fig. 4. (A) Confractamnis johnjelli n.gen. and n.sp. Reconstruction of left lateral side of the trunk armour, based on ANU V1028 (holotype). (B–D) Isolated left ADL plate from the Early Devonian of Morocco, in external (B), anterior (C), and internal (D) views. Specimen MCD 62, figured by Lelièvre (1984b: pl. 6F–H).
Fig. 2. Confractamnis johnjelli n.gen. and n in A New Middle Devonian Arthrodire (Placoderm Fish) from the Broken River Area, Queensland
Fig. 2. Confractamnis johnjelli n.gen. and n.sp. ANU V1028 (holotype). Bones of the trunk armour in external view (all incomplete). (A) Left ADL plate, with part of the MD plate and a fragment of the AL plate attached; (B) left PDL plate, with part of the PL plate attached; (C) left PL plate. All specimens acid-prepared, and whitened with ammonium chloride for photography.
Fig. 1 in A New Middle Devonian Arthrodire (Placoderm Fish) from the Broken River Area, Queensland
Fig. 1. (A) Location of the Broken River area in Queensland, Australia. (B) Geological map of the collecting area (modified from Turner et al., 2000: fig. 2), showing the locality (Grid Reference 640 460) for the specimens described in this paper.
Fig. 6 in A New Middle Devonian Arthrodire (Placoderm Fish) from the Broken River Area, Queensland
Fig. 6. Left trunk armour bones of the Late Devonian brachythoracid Dunkleosteus, arranged to show overlap relations (not to scale). (A,D) ADL plate in lateral and internal views (reversed images from Heintz, 1932: figs. 46–n>47); (B) PDL plate, and (C) PL plate, both in external view (from Heintz, 1932: figs. 49, 54).
FIG. 1 in Silurian and Lower Devonian anaspids (Agnatha) from Severnaya Zemlya (Russia)
FIG. 1. — Distribution of the anaspids in the sections of the Severnaya Zemlya Archipelago. Sample numbers from October Revolution Island on the left side, sample numbers from Pioneer and Komsomolets islands on the right. Abbreviations: Dev., Devonian; Ll., Llandovery; Loch., Lochkov; Př., Přidoli; W., Wenlock.
Figure 5 in Oldest shrimp and associated phyllocarid from the Lower Devonian of northern Russia
Figure 5. Restoration of (A) Pechoracaris aculicauda sp. nov. and (B) Archangeliphausia spinosa sp. nov.
Figure 3 in Oldest shrimp and associated phyllocarid from the Lower Devonian of northern Russia
Figure 3. Archangeliphausia spinosa sp. nov. A, specimen with oblique dorsoventrally compressed carapace and well preserved scaphocerite of 2nd antenna (PIN 4983/2). B, specimens with partially preserved telson and uropods (PIN 4983/ 32a, b). C, specimens with partially preserved telson and uropods (PIN 4983/12a, b). D, posterior part of abdomen with well preserved 6th pleosomite (PIN 4983/4a). E, posterior part of abdomen with well preserved pleura (PIN 4983/39). F, dorsoventrally compressed 6th pleosomite and partial uropods (PIN 4983/36). G, specimen with well preserved spinose pleura (PIN 4983/31).
Figure 2 in Oldest shrimp and associated phyllocarid from the Lower Devonian of northern Russia
Figure 2. Archangeliphausia spinosa sp. nov. A, holotype (PIN 4983/1a: right) and associated specimen (PIN 4983/1b). B, largest specimen found (PIN 4983/35), with relatively thick cuticle. C, juvenile specimen (PIN 4983/37). E, specimen with dorsoventrally compressed telson and uropods (PIN 4983/28; see also Fig. 4C). D, posterior part of abdomen with well preserved 6th pleosomite and telson (PIN 4983/8).
Fig. 9 in Rugose corals across the Devonian-Carboniferous boundary in NW Turkey
Fig. 9. Palaeogeographic occurrences of uppermost Famennian (Strunian) rugose corals (modified after Chwieduk 2005, map after Golonka et al. 1994). 1, Omolon Massif (E Siberia); 2, Novaya Zemlya; 3, Istanbul Zone (NW Turkey); 4, Kraków, Holy Cross Mountains and Sudetes (S Poland); 5, PomeraniaRügen area (NW Poland and NE Germany); 6, German Kulm area (Thuringian and Rheinish massifs); 7, Namur-Dinant Basin (S Belgium, French Avesnois, German Aachen area); 8, Montagne Noire (S France); 9, Anti-Atlas (Morocco); 10, Xinzang (Tibet); 11, Transcaucasus (Armenia); 12, Hunan and Guizhou (S China); 13, Viet-Nam; 14, NW Australia; 15, New Mexico.
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