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36 results for “Smithian-Spathian”
Fig. 2 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 2 Pictures from four of the five studied sections in the Nanpanjiang basin. A Qiakong, B Shanggang, C Laren (Kuang Guodun for scale), D Lilong (Hugo Bucher for scale)
Fig. 3 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 3 Qiakong. Detailed stratigraphic log of the studied interval of the Qiakong section showing the distribution of conodont taxa and the δ13Ccarb record throughout the middle Smithian part of the Daye Formation and the late Smithian to Spathian Luolou Formation. The LMHs and UAZs are indicated
Fig. 26 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 26 Cornudininae from Qiakong, Laren and Shanggang. Magnification is × 80. The scale bar is 400 μm. All elements are considered to be P1 elements if not specifically identified otherwise. A–W Urdyella unicorna n. gen. n. sp.; A LAR225, PIMUZ 39345; B LAR225, PIMUZ 39346; C LAR229, PIMUZ 39347; D LAR227, PIMUZ 39348; E LAR229, PIMUZ 39349; F LAR229, PIMUZ 39350; G LAR225, PIMUZ 39351; H LAR229, PIMUZ 39352; I QIA123, PIMUZ 39353; J LAR227, PIMUZ 39354; K QIA123, PIMUZ 39355; L QIA123, PIMUZ 39356; M LAR227, PIMUZ 39357; N LAR225, PIMUZ 39358; O QIA120, PIMUZ 39359; P LAR225, PIMUZ 39360; Q QIA121, PIMUZ 39361; R LAR232, PIMUZ 39362; S LAR232, PIMUZ 39363; T QIA124, PIMUZ 39364; U LAR232, PIMUZ 39365; V QIA123, PIMUZ 39366; W SHA341, PIMUZ 39367. X-AA Urdyella tridenta n. gen. n. sp.; X LAR227, PIMUZ 39341; Y LAR227, PIMUZ 39342; Z LAR227, PIMUZ 39343; AA LAR227, PIMUZ 39344. AB, AC Discretella? n. sp. D; AB QIA124, PIMUZ 39118; AC QIA123, PIMUZ 39119. AD Neostrachanognathus n. sp. A; LAR232, PIMUZ 39183. AE Urdyella n. sp. A; LAR232, PIMUZ 39340
Fig. 18 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 18 Novispathodinae from Laren and Lilong. Magnification is × 80. The scale bar is 400 μm. All elements are considered to be P1 elements if not specifically identified otherwise. A, B, D, F, L–N, Q, S, T Novispathodus praebrevissimus n. sp.; A LIL506, PIMUZ 39274; B LAR207, PIMUZ 39275; D LIL508, PIMUZ 39276; F LIL507, PIMUZ 39277; L LIL507, PIMUZ 39278; M LIL509, PIMUZ 39279; N LIL507, PIMUZ 39280; Q LIL507, PIMUZ 39281; S LIL507, PIMUZ 39282; T LIL507, PIMUZ 39283. C, O, R Novispathodus?praebrevissimus n. sp.; C LAR204, PIMUZ 39284; O LIL507, PIMUZ 39285; R LIL507, PIMUZ 39286. E, I Novispathodus ex gr. pingdingshanensis (Zhao & Orchard); E LIL507, PIMUZ 39232, I LIL507, PIMUZ 39233. G Triassospathodus aff. symmetricus (Orchard); LIL507, PIMUZ 39309. H Novispathodus ex gr. abruptus (Orchard); LIL507, PIMUZ 39212. J, K Novispathodus praebrevissimus (juvenile) n. sp.; J LIL507, PIMUZ 39287; K LIL507, PIMUZ 39288. P Novispathodus robustispinus (Zhao & Orchard); LIL507, PIMUZ 39290
Fig. 20 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 20 Novispathodinae from Qiakong, Laren and Lilong. Magnification is × 80. The scale bar is 400 μm. All elements are considered to be P1 elements if not specifically identified otherwise. A–G, K–M, Q, X Novispathodus ex gr. abruptus (Orchard); A LAR212, PIMUZ 39213; B LAR207, PIMUZ 39214; C LAR205, PIMUZ 39215; D LAR202, PIMUZ 39216; E LAR202, PIMUZ 39217; F LIL506, PIMUZ 39218; G LAR210, PIMUZ 39219; K LIL505, PIMUZ 39220; L LIL506, PIMUZ 39221; M LIL505, PIMUZ 39222; Q LAR203, PIMUZ 39223; X QIA136, PIMUZ 39224. H, V Novispathodus sp. indet.; H QIA136, PIMUZ 39291; V, QIA134, PIMUZ 39292. I, J, P, AA Novispathodus n. sp. Z; I QIA138, PIMUZ 39247; J QIA138, PIMUZ 39248; P LIL506, PIMUZ 39249; AA QIA136, PIMUZ 39250. N, O, S Novispathodus ex gr. pingdingshanensis (Zhao & Orchard); N LIL506, PIMUZ 39234; O LIL505, PIMUZ 39235; S QIA136, PIMUZ 39236. R sp. indet.; LIL511, PIMUZ 39296. T, Y, Z Novispathodus n. sp. A; T QIA134, PIMUZ 39256, Y QIA135, PIMUZ 39257; Z QIA134, PIMUZ 39258. U Novispathodus expansus (Zhao & Orchard); QIA134, PIMUZ 39242. W Novispathodus gryphus n. sp.; QIA135, PIMUZ 39246
Fig. 16 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 16 Neogondolellinae, Novispathodinae and Mullerinae from Shanggang and Youping cascade. Magnification is × 80. The scale bar is 400 μm. All elements are considered to be P1 elements if not specifically identified otherwise. A, F, M Discretella? n. sp. C; A YC16, PIMUZ 39115; F YC16, PIMUZ 39116; M SHA342C, PIMUZ 39117. B Discretella? n. sp. B; YC16, PIMUZ 39113. C Discretella aff. discreta (MÜller); YC22, PIMUZ 39106. D, S Discretella discreta (MÜller); D YC16, PIMUZ 39110; S SHA304C, PIMUZ 39111. E Novispathodus ex gr. abruptus (Orchard); YC41, PIMUZ 39225. G–I, K, L, N, O Discretella pseudodieneri n. sp.; G YC16, PIMUZ 39124; H YC25, PIMUZ 39125; I SHA304C, PIMUZ 39126; K YC22, PIMUZ 39127, L YC25, PIMUZ 39128; N SHA304C, PIMUZ 39129; O SHA343C, PIMUZ SQL54979. J Guangxidella bransoni (MÜller); YC16, PIMUZ 39140. P–R Neospathodus bevelledi n. sp.; P SHA 304C, PIMUZ 39178; Q SHA333C, PIMUZ 39179; R YC12, PIMUZ 39180
Fig. 13 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 13 Gladigondolellinae, Neogondolellinae and Cornudininae from Qiakong, Laren, Shanggang and Lilong. Magnification is × 80. The scale bar is 400 μm. All elements are considered to be P1 elements if not specifically identified otherwise. A Borinella buurensis (Dagis), LAR212, PIMUZ 39103. B, C, G Gladigondolella laii (morphotype A); B LAR231C, PIMUZ 39132; C BAN2, PIMUZ 39133; G LAR227C, PIMUZ 39134. D, sp. indet.(P2 element?), SHA319, PIMUZ 39293. E, F, H, I Gladigondolella laii (morphotype B); E LIL510, PIMUZ 39135; F LIL512, PIMUZ 39136; H QIA140, PIMUZ 39137; I LIL510, PIMUZ 39138. J–L, O, Spathicuspus spathi (Sweet); J QIA141, PIMUZ 39300; K QIA144, PIMUZ 39301; L BAN1, PIMUZ 39302; O SHA322, PIMUZ 39303. M, P Spathicuspus n. sp. A; M QIA144, PIMUZ 39297; P, QIA143, PIMUZ 39298. N, R Spathicuspus spathi (juvenile) (Sweet); N, LIL515D, PIMUZ 39304; R QIA143, PIMUZ 39305. Q Spathicuspus n. sp. B; LAR226C, PIMUZ 39299
Fig. 17 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 17 Novispathodinae from Qiakong, Laren, Shanggang, and Lilong. Magnification is × 80. The scale bar is 400 μm. All elements are considered to be P1 elements if not specifically identified otherwise. A–C, J, T, AA Novispathodus ex gr. pingdingshanensis (Zhao & Orchard); A, QIA138, PIMUZ 39226; B QIA138, PIMUZ 39227; C LAR202, PIMUZ 39228; J QIA136, PIMUZ 39229; T LIL504, PIMUZ 39230; AA LIL508, PIMUZ 39231. D–F, M–P, R, S, U, X, AB, AD Novispathodus pingdingshanensis (Zhao & Orchard); D QIA135, PIMUZ 39259; E LIL508, PIMUZ 39260; F LIL506, PIMUZ 39261; M LIL506, PIMUZ 39262; N LIL506, PIMUZ 39263; O LIL507, PIMUZ 39264; P LIL506, PIMUZ 39265; R LIL508, PIMUZ 39266; S LAR204, PIMUZ 39267; U LIL507, PIMUZ 39268; X LIL508, PIMUZ 39269; AB LIL508, PIMUZ 39270; AD LIL508, PIMUZ 39271. G, I, Q Novispathodus cf.?gryphus n. sp.; G QIA136, PIMUZ 39204; I QIA136, PIMUZ 39205; Q QIA135, PIMUZ 39206. H, K, L Novispathodus gryphus n. sp.; H QIA135, PIMUZ 39243; K LIL506, PIMUZ 39244; L LIL506, PIMUZ 39245. V Novispathodus praebrevissimus n. sp.; LIL507, PIMUZ 39273. W, Y, Z, AE Novispathodus ex gr. abruptus (Orchard); W LIL505, PIMUZ 39208; Y SHA346, PIMUZ 39209; Z LIL506, PIMUZ 39210; AE SHA346, PIMUZ 39211. AC sp. indet.; LIL504, PIMUZ 39295. AF Novispathodus pingdingshanensis (P1 cluster) (Zhao & Orchard); QIA136, PIMUZ 39272
Fig. 26 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 26 (See legend on previous page.)
Fig. 17 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 17 (See legend on previous page.)
Fig. 20 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 20 (See legend on previous page.)
Fig. 18 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 18 (See legend on previous page.)
Fig. 16 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 16 (See legend on previous page.)
Fig. 13 in A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China
Fig. 13 (See legend on previous page.)
Data from: An expanded Smithian-Spathian (Early Triassic) boundary from a reefal build-up record in Oman: Implications for conodont taxonomy, high-resolution biochronology and the carbon isotope record
<p><span>Some 2.7 Ma after the Permian-Triassic boundary mass extinction (PTME), a stepwise extinction of the nekton (ammonoids and conodonts) ended at the Smithian-Spathian boundary (SSB) during an episode of climate cooling. SSB records from continental shelves are usually affected by an unconformity, suggesting a forced regression of glacio-eustatic origin. Here, we document a new 30 m-thick SSB section from Jebel Aweri (Batain Plain, Oman) that provides an exceptionally complete and expanded record preserved in an exotic block. Most of this SSB section consists of metazoan reefal build-ups that formed in shallow water on an offshore sea mount. In Wadi Musjah (Hawasina nappes, Oman), another exotic block records the SSB in a deeper water setting represented by Hallstatt-type facies. These two sections provide a unique perspective on the early Spathian rapid re-diversification of conodonts. They led to a thorough revision of conodont taxonomy around the SSB and to the construction of the highest resolution biochronological scheme for this time interval in the Tethys. A total of five SSB sections from Oman representing both offshore sea mounts and lower slope deposits were included in a high-resolution, quantitative Unitary Associations analysis. The resulting 8 conodont biozones are intercalibrated with ammonoid zones and with the carbonate carbon isotope record ultimately placing the SSB in the interval of separation between UAZ<sub>3</sub> and UAZ<sub>4</sub>. Only the association of <em>Nv. pingdingshanensis</em> with <em>Ic. crassatus</em> can be used to unambiguously characterize the base of the Spathian.</span></p>
Data from: An expanded Smithian-Spathian (Early Triassic) boundary from a reefal build-up record in Oman: Implications for conodont taxonomy, high-resolution biochronology and the carbon isotope record
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