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230 results for “Turonian”
Fig. 1. A in Lower Turonian record of belemnite Praeactinocamax from NW Siberia and its palaeogeographic significance
Fig. 1. A. The geographic position of the North Siberian Upper Cretaceous belemnite locality at the Agapa River (Taimyr Peninsula). B. Schematic sketch of the exposed section at the find locality. Belemnite levels are indicated, for more details see text.
Fig. 3 in Extremely Rare Turonian Belemnites from the Bohemian Cretaceous Basin and Their Palaeogeographical Importance
Fig. 3. Palaeogeographic map of the Northern hemisphere (North pole projection). 1, Cenomanian belemnitellid radiation centre (Russian Platform); 2, Lower Turonian records (Agapa river, northwest Siberia); 3, North American Middle Turonian records; 4, Upper Turonian record from Greenland; 5, Upper Turonian records from the Bohemian Cretaceous Basin, Germany and south Sweden. Dashed line indicates palaeobiogeographic barrier during the latest Cenomanian through early Coniacian. Dots indicate the possible migration pathway; grey are land areas during the Late Cretaceous, white are seas and oceans. Modified after Košťák and Wiese (2006, 2008).
Fig. 4. New Upper Turonian belemnite specimens from the Bohemian Cretaceous Basin. A–E in Extremely Rare Turonian Belemnites from the Bohemian Cretaceous Basin and Their Palaeogeographical Importance
Fig. 4. New Upper Turonian belemnite specimens from the Bohemian Cretaceous Basin. A–E. Praeactinocamax bohemicus (Stolley) A. IGP_Upo2009/5 in lateral (A1) and central (A2) views. B. IGP_Upo2009/3 in lateral (B1), ventral (B2), dorsal (B3) views, and alveolar end (B4). C. IGP_Upo2009/2 in ventral (C1), dorsal (C2), and lateral (C3) views, alveolar end (C4). D. IGP_Upo2009/1 in ventral (D1), lateral (D2), and dorsal (D3) views, alveolar end (D4). E. IGP_Upo2009/4 in ventral view (E1), alveolar end (E2). F. Praeactinocamax cf. strehlensis, IGP_Upo2009/8 in ventral (F1), dorsal (F2), and lateral (F3) views, pseudoalveolus (F4). Scale bars 10 mm.
Fig. 7 in New sharks and rays from the Cenomanian and Turonian of Charentes, France
Fig. 7. Teeth of the rajiform Engolismaia gen. nov. from the Cenomanian of Charentes, SW France. Engolismaia couillardi gen. et sp. nov., Traslemaine, Early Cenomanian. A. Holotype, specimen UM TLM 1; in occlusal (A1), lingual (A2), basal (A3), labial (A4), and lateral (A5) views. B. Specimen UM TLM 2; in occlusal (B1), lingual (B2), and lateral (B3) views. C. Specimen UM TLM 3; in occlusal view. D. Specimen UM TLM 4; in lingual (D1), lateral (D2), and occlusal (D3) views. E. Rajiformes indet., l'Amas, Late Cenomanian; occlusal (E1), basal (D2), and lingual (D3) views of UM AMA 13.
Fig. 6 in New sharks and rays from the Cenomanian and Turonian of Charentes, France
Fig. 6. Teeth of the rajiform Archingeayia gen. nov. from the Cenomanian of Charentes, SW France. Archingeayia sistaci gen. et sp. nov., Font−de−Benon, Lower Cenomanian. A. Specimen UM FBN 2; in lingual (A1), basal (A2), and lateral (A3) views. B. Specimen UM FBN 3; in lingual (B1), basal (B2), and occlusal (B3) views. C. Holotype, specimen UM FBN 4; in lingual (C1), labial (C2), occlusal (C3), and basal (C4) views.
Fig. 3 in New sharks and rays from the Cenomanian and Turonian of Charentes, France
Fig. 3. Teeth of the odontaspidid Roulletia gen. nov. from the Cenomanian of Charentes, SW France. Roulletia bureaui gen. et sp. nov., l'Amas, Upper Cenomanian. A. Specimen UM AMA 3; in labial view. B. Specimen UM AMA 4; in labial (B1), mesial (B2), and lingual (B3) views. C. Specimen UM AMA 5; in labial (C1), and lingual (C2) views. D. Holotype, specimen UM AMA 6; in labial (D1), mesial (D2), and lingual (D3) views. E. specimen UM AMA 7; in labial (E1), and lingual (E2) views. F. specimen UM AMA 8; in labial (F1), mesial (F2), and lingual (F3) views. G. specimen UM AMA 9; in labial (G1), and lingual (G2) views.
Fig. 5 in New sharks and rays from the Cenomanian and Turonian of Charentes, France
Fig. 5. Teeth of the rajiform Hamrabatis Cappetta, 1991 from the Cenomanian of Charentes, SW France. Hamrabatis bernardezi sp. nov., Fouras−Vauban (A, B) and Montagan (C), Lower Cenomanian. A. Holotype, specimen UM FVN 1; in occlusal (A1), basal (A2), and lingual (A3) views. B. Specimen UM FVN 2; in occlusal (B1), lateral (B2), labial (B3), and basal (B4) views. C. Specimen UM MTG 1; in occlusal (C1), and basal (C2) views. C3: enlargement of the root showing the endolithic microborings (ichnotaxon Abeliella riccioides Mägdefrau, 1937) near the crown−root junction.
Fig. 1. A in New sharks and rays from the Cenomanian and Turonian of Charentes, France
Fig. 1. A. Map of the Charentes region showing the Cenomanian and Turonian outcrops and the geographical position of the localities which have yielded the selachian teeth studied in this paper. B. Stratigraphical positions of the localities.
Fig. 2 in New sharks and rays from the Cenomanian and Turonian of Charentes, France
Fig. 2. Teeth of the hemiscylliid Almascyllium Cappetta, 1980a, the ginglymostomatid Cantioscyllium Woodward, 1889, the cretoxyrhinid Archaeolamna Siverson, 1992 and the anacoracid Squalicorax Whitley, 1939 from the Cenomanian and Turonian of Charentes, SW France. A. Almascyllium sp., Font−de−Benon, Lower Cenomanian; labial view of UM FBN 1. B. Cantioscyllium cf. decipiens Woodward, 1889, l'Amas, Upper Cenomanian; labial (B1), and occlusal (B2) views of UM AMA 1. C. Archaeolamna sp., l'Amas, Upper Cenomanian; labial (C1), and lingual (C2) views of UM AMA 2. D. Squalicorax baharijensis Stromer, 1927, Le Mas, Upper Cenomanian; labial (D1), and lingual (D2) views of UM LMS 1. E. Holotype of Squalicorax coquandi sp. nov., Port−des−Barques, basal Turonian; labial (E1), distal (E2), and lingual (E3) views of UM PDB 1. F. Squalicorax cf. intermedius Glückman in Glückman and Shvazhaite, 1971, Le Puits des Insurgés, Upper Cenomanian; labial (F1), mesial (F2), and lingual (F3) views of UM PDI 1.
Fig. 4 in New sharks and rays from the Cenomanian and Turonian of Charentes, France
Fig. 4. Teeth of the odontaspidid Cenocarcharias Cappetta and Case, 1999 from the Cenomanian of Charentes, SW France. Cenocarcharias rochebrunei (Sauvage, 1880), L'Amas, Upper Cenomanian. A. Neotype, specimen UM AMA 10; in labial (A1), mesial (A2), and lingual (A3) views. B. Specimen UM AMA 11; in labial (B1), distal (B2), and lingual (B3) views. C. Specimen UM AMA 12; in labial (C1), and lingual (C2) views.
Fig. 12 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 12. Water salinities (in ppt) calculated from Recent and fossil aragonite samples. Abbreviations: op, outer prismatic layer; ip, inner prismatic layer; nac, nacreous layer; cl, crossed lamellar layer.
Fig. 11 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 11. Principal component plots based on the chemical compositions of the Recent and fossil shells, sediments and sedimentary calcite. Sedimentary calcite (labelled "calcite" in the diagram) is clearly separated from the Recent and fossil shell calcites.
Fig. 8 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 8. Element distribution maps for Sr (A), Mg (B), Fe (C), and S (D) across the aragonite/calcite boundaries in Goniocamax sp. from the Turonian of N Siberia.
Fig. 7 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 7. Minor element contents (in ppm) in fossil shells. A. Average compositions of aragonite and calcite in Goniocamax. B. Average compositions of inner prismatic and nacreous layers in ammonites. C. The compositions of a crossed lamellar aragonite layer in a gastropod; a nacreous aragonite layer in an inoceramid shell, and a foliated calcite layer in Pecten.
Fig. 6 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 6. Box and whisker plots for selected minor elements in Recent and fossil shells, and sedimantary calcite. Details of analysed samples are given in the section "Materials and methods". Plots are for magnesium Mg (A), strontium Sr (B), sodium Na (C), iron Fe (D), sulphur S (E), and phosphorus P (F). Recent samples: left part of the graph; fossil samples: right part of the graph.
Fig. 4 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 4. Minor element contents (in ppm) in Recent shells. A. Average compositions of inner prismatic and outer prismatic aragonite layers in Sepia and Spirula. B. Average compositions of inner prismatic, nacreous and outer prismatic aragonite layers in Nautilus macromphalus. C. Average compositions of crossed lamellar aragonite layer in gastropods; in the nacreous aragonite layer in Pinna nobilis, and foliated calcite layer in Pecten.
Fig. 5 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 5. Box and whisker plots based on the chemical compositions of the shells. A. Explanation of the box and whisker plot. B. Box and whisker plot for Ca in Recent and fossil shells, and sedimentary calcite.
Fig. 9 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 9. Principal component plots based on the chemical compositions of the Recent and fossil shells. A. Samples are grouped according to their age, with Recent shells having relatively high Ca and Na contents, and low Fe, P, and Sr contents. B. Samples are grouped according to their mineralogy in terms of calcite and aragonite. Calcite samples have relatively high Mg, S, and Ca contents, and aragonite samples have higher Sr contents.
Fig. 10. 3D in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 10. 3D principal component plots based on the chemical compositions of the Recent and fossil shells. Axis 1 has high negative loadings corresponding to P, Fe, and Sr, with a positive Na loading. Axis 2 has high negative loadings corresponding to S, Ca, and Fe, and a positive Sr loading. Axis 3 has a high negative loading corresponding to Mg and a positive Sr loading. Recent and fossil calcites are separated according to axis 3, whereas Recent and fossil aragonites are separated according to axis 1.
Fig. 2 in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis
Fig. 2. Secondary electron images illustrating the microstructures of Recent shells. A. Dorsal shield of Sepia sp. (from New Caledonia), showing the thin inner prismatic layer, the nacreous layer and the thick multi−layered outer spherulitic prismatic layer. B. Outer wall of Spirula sp. (from New Caledonia), showing two prismatic layers and a mainly organic thin nacreous layer (arrow). C. Nautilus macromphalus (from New Caledonia). D. Nacreous layer of the pelecypod Pinna nobilis (from the Mediterranean Sea, Port Cros Island). E. Foliated calcite layer of Pecten maximus (from Brittany, France). F. Crossed lamellar aragonite layer of the gastropod Murex sp. (of unknown origin). Abbreviations: ip, inner prismatic layer; nac, nacreous layer; op, outer prismatic layer. All specimens from the UPS collection of Recent molluscs, not numbered.
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Allen Brain Atlas
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OpenNeuro
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