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543 Results Found

  • Article
  • Open Access
7 Citations
3,274 Views
8 Pages

25 October 2022

In stark contrast to the multitude of hypotheses on carpel evolution, there is little fossil evidence testing these hypotheses. The recent discovery of angiosperms from the Early Jurassic makes the search for precursors of angiosperm carpels in the T...

  • Article
  • Open Access
1,238 Views
19 Pages

11 July 2025

Based on drilling, core and seismic data, combined with the regional tectonic sedimentary evolution background, the sedimentary environment of the Triassic carbonate rocks in the Mangeshlak Basin was studied. A sedimentary facies model of this set of...

  • Communication
  • Open Access
468 Views
9 Pages

27 January 2026

The influence of ocean chemistry on Early Triassic biotic recovery is poorly understood in the Chaohu Area. Here, we evaluate the influence of ocean chemistry following the Permian–Triassic crisis using pyrite content, δ13Corg, and S isot...

  • Review
  • Open Access
5 Citations
4,282 Views
30 Pages

The end-Permian mass extinction was the largest biodiversity crisis in the Phanerozoic. Based on characteristic negative ∆33S signals of sedimentary pyrite, previous multiple sulfur isotope studies suggested shoaling of anoxic/sulfidic deep-waters on...

  • Article
  • Open Access
4,355 Views
15 Pages

A silicified, thick-shelled, smooth-surfaced nuculanoid bivalve has been recovered using acid maceration of the Late Triassic (Carnian–Norian) strata of the Luning Formation, Nevada. Comparable modern nuculanoid clams inhabit water depths from...

  • Article
  • Open Access
2 Citations
3,569 Views
17 Pages

19 April 2023

As one of the predominant benthic organisms in the Palaeozoic, brachiopod was largely eliminated in the Permian–Triassic boundary mass extinction, and then highly diversified in the Middle Triassic. Since fossil data from the Early Triassic are...

  • Article
  • Open Access
1,080 Views
20 Pages

26 February 2025

During the deposition of the Middle–Upper Triassic Yanchang Formation, the southern margin of the Ordos Basin (OB) serves as a critical area for investigating the tectonic interactions between the North China Block (NCB) and Qinling Orogenic Be...

  • Article
  • Open Access
2 Citations
1,923 Views
26 Pages

Vertebrate Diversity of the Middle Triassic Xingyi Fauna

  • Da-yong Jiang,
  • Andrea Tintori,
  • Min Zhou,
  • Ryosuke Motani,
  • Cheng Ji,
  • Olivier Rieppel,
  • Nicholas C. Fraser,
  • Davide Conedera,
  • Ming-tao Yao and
  • Zuo-yu Sun
  • + 1 author

26 June 2025

The Xingyi Fauna yields abundant and well-articulated skeletons of Ladinian (Middle Triassic, ab. 240 Ma) marine reptiles, associated with fishes, conodonts, crinoids, ammonoids, bivalves, arthropods, and other fossils including nannofossils and copr...

  • Article
  • Open Access
2,135 Views
22 Pages

The Placerias quarry is a dicynodont-dominated bonebed in Upper Triassic Chinle Group strata near St. Johns in east-central Arizona, USA. Though long identified as being in strata of the lower Chinle Group, recently published numerical ages apparentl...

  • Article
  • Open Access
6 Citations
3,683 Views
31 Pages

17 May 2022

The Jinshajiang–Ailaoshan–Song Ma orogenic belt (JASB), as a vital segment of the eastern Paleo-Tethyan tectonic zone, is one of the most important zones in which to study the Paleo-Tethyan tectonic evolution. We have undertaken an integr...

  • Article
  • Open Access
1 Citations
1,873 Views
16 Pages

4 November 2024

Here we report and describe a new assemblage of Thylacocephala (Crustacea) from the Early Ladinian Buchenstein Fm. (Middle Triassic) of Grigna, Northern Italy. The assemblage consists of at least four species from three different genera: Ankitokazoca...

  • Article
  • Open Access
2 Citations
2,636 Views
19 Pages

24 December 2023

The influence of the paleo-Tethys or paleo-Pacific oceanic plate subduction on Early Triassic South China has long been debated. We have studied the zircon U-Th-Hf isotopes, trace elements, and whole-rock geochemistry of Early Triassic peraluminous g...

  • Article
  • Open Access
3 Citations
7,921 Views
31 Pages

Mechanistic Thermal Modeling of Late Triassic Terrestrial Amniotes Predicts Biogeographic Distribution

  • Scott A. Hartman,
  • David M. Lovelace,
  • Benjamin J. Linzmeier,
  • Paul D. Mathewson and
  • Warren P. Porter

12 November 2022

The biogeography of terrestrial amniotes is controlled by historical contingency interacting with paleoclimate, morphology and physiological constraints to dispersal. Thermal tolerance is the intersection between organismal requirements and climate c...

  • Article
  • Open Access
4 Citations
5,664 Views
64 Pages

Upper Triassic Carbonate Records: Insights from the Most Complete Panthalassan Platform (Lime Peak, Yukon, Canada)

  • Nicolò Del Piero,
  • Sylvain Rigaud,
  • Camille Peybernes,
  • Marie-Beatrice Forel,
  • Nicholas Farley and
  • Rossana Martini

Upper Triassic carbonate platforms from the Panthalassa Ocean remain less-understood and less-studied than their Tethyan equivalents. This imbalance is largely due to the poorer preservation state of Panthalassan carbonate rock successions in terms o...

  • Article
  • Open Access
2 Citations
1,508 Views
18 Pages

Middle Triassic Limestones as a Source of Trace Elements and REY

  • Katarzyna Stanienda-Pilecki,
  • Katarzyna Nowińska,
  • Andrzej Nowrot and
  • Janusz Szewczenko

25 July 2024

The results of the content determination of the selected trace elements Ti, Sr, Ba, Zn, Pb, Cu, S, P, Cr, Cd, Ni, Zr, Mo, Rb, Sc, Y, and REEs were presented in this article. Studies were carried out to define the purity of limestones. The elements we...

  • Article
  • Open Access
5 Citations
10,705 Views
31 Pages

The Hydrothermal Breccia of Berglia-Glassberget, Trøndelag, Norway: Snapshot of a Triassic Earthquake

  • Axel Müller,
  • Morgan Ganerød,
  • Michael Wiedenbeck,
  • Skule Olaus Svendsen Spjelkavik and
  • Rune Selbekk

23 April 2018

The quartz-K-feldspar-cemented breccia of Berglia-Glassberget in the Lierne municipality in central Norway forms an ellipsoid structure 250 m × 500 m in size. The hydrothermal breccia is barren in terms of economic commodities but famous among minera...

  • Article
  • Open Access
699 Views
22 Pages

9 April 2025

The Youjiang Basin is situated at the junction between the Tethyan and Pacific tectonic domains, and its Permian–Triassic volcanic rocks provide important geological archives recording the tectonic evolution and collisional interactions between...

  • Article
  • Open Access
17 Citations
9,659 Views
21 Pages

A New Rhynchosaur Taxon from the Popo Agie Formation, WY: Implications for a Northern Pangean Early-Late Triassic (Carnian) Fauna

  • Adam J. Fitch,
  • Merle Haas,
  • Wayne C’Hair,
  • Eugene Ridgley,
  • Ben Ridgley,
  • Devin Oldman,
  • Crystal Reynolds and
  • David M. Lovelace

10 April 2023

New discoveries in the lower Popo Agie Formation (lower carbonate unit) of central Wyoming necessitated a reevaluation of USNM 494329 from the same unit, the only known hyperodapedontine rhynchosaur in western North America. Well known from Gondwanan...

  • Article
  • Open Access
2 Citations
2,306 Views
13 Pages

20 March 2023

Mantle wedge melting and the formation of hydrous mafic melts in collision orogenic belts have great significance for crustal melting and the related granitic magmatism, which can provide key messages about the crustal–mantle interaction in the...

  • Article
  • Open Access
10 Citations
4,422 Views
21 Pages

Early Triassic Monzonite–Granite Series in Eastern Kazakhstan as a Reflection of Siberian Large Igneous Province Activity

  • Sergey V. Khromykh,
  • Pavel D. Kotler,
  • Anna V. Kulikova,
  • Dina V. Semenova,
  • Kamil R. Minnebaev,
  • Bulat I. Gareev,
  • Georgii A. Batalin,
  • Tatiana N. Antsiferova,
  • Ekaterina A. Il’icheva and
  • Alexey S. Volosov

29 August 2022

We provide the results of studying the internal structure and composition of the rocks of the Semeitau and Delbegetei massifs located in Eastern Kazakhstan. It was previously believed that these massifs have different ages and were formed in differen...

  • Article
  • Open Access
5 Citations
2,967 Views
8 Pages

28 June 2022

Triassopsyllidiida pectinata gen. et sp. nov. is described from the latest Middle Triassic Tongchuan biota of China and tentatively attributed to the superfamily Protopsyllidioidea. Its forewing venation is unique among this superfamily in the anteri...

  • Article
  • Open Access
10 Citations
6,771 Views
34 Pages

27 May 2021

The Salt Range, in Pakistan, preserves an insightful sedimentary record of passive margin dynamics along the NW margin of the Indian Plate during the Mesozoic. This study develops provenance analyses of the Upper Triassic (Kingriali Formation) to Low...

  • Article
  • Open Access
3 Citations
1,775 Views
18 Pages

22 February 2024

Precise determination of the tectonothermal events at the Qinling–Qilian junction is significant for understanding the tectonic evolution of the eastern branch of the Paleo-Tethys. The Banpo pluton outcrops in the northern margin of the North Q...

  • Article
  • Open Access
6 Citations
3,836 Views
18 Pages

27 February 2023

The sedimentary facies, architecture, and depositional mechanism of deltaic systems have been one of the global research hotspots in recent decades; however, the detailed distribution, sedimentary evolution, source rock potential, and major control f...

  • Article
  • Open Access
8 Citations
3,895 Views
19 Pages

19 December 2019

Provenance analysis of sediments provides important constraints on basin formation and orogenic processes. With the aim to define the sedimentary provenance and tectonic evolution of the southern margin of the North China Craton, this paper presents...

  • Communication
  • Open Access
7 Citations
3,548 Views
22 Pages

10 December 2019

The Yidun arc, located in the southeastern Tibetan Plateau, was formed by the westward subduction of the Ganze-Litang Paleo-Tethys ocean in Late Triassic. It is well-known for the formation of numerous Mesozoic porphyry-skarn Cu-Mo-(Au) deposits in t...

  • Article
  • Open Access
14 Citations
2,890 Views
15 Pages

30 August 2022

Structures similar to fossilized nonspicular demosponges have been reported in carbonates throughout the Phanerozoic and recently in rocks dating back to 890 Ma ago. Interpretation of these records is increasingly influential to our understanding of...

  • Article
  • Open Access
1 Citations
3,086 Views
23 Pages

The Origins of the Hydrogen Sulphide (H2S) Gas in the Triassic Montney Formation, British Columbia, Canada

  • Gareth Chalmers,
  • Pablo Lacerda Silva,
  • Amanda Bustin,
  • Andrea Sanlorenzo and
  • Marc Bustin

The inexplicable distribution of souring wells (presence of H2S gas) of the unconventional Montney Formation hydrocarbon resource (British Columbia; BC) is investigated by analysing sulphur and oxygen isotopes, coupled with XRD mineralogy, scanning e...

  • Article
  • Open Access
3 Citations
3,927 Views
14 Pages

5 January 2020

The Chungju rare-earth element (REE) deposit is located in the central part of the Okcheon Metamorphic Belt (OMB) in the Southern Korean Peninsula and research on REE mineralization in the Gyemyeongsan Formation has been continuous since the first re...

  • Article
  • Open Access
1 Citations
1,968 Views
21 Pages

17 September 2023

Following the latest Permian mass extinction (LPME), the ocean experienced turbulent conditions due to elevated temperatures during the Griesbachian (Early Triassic). These adverse conditions resulted in a prolonged delay in biotic recovery. However,...

  • Article
  • Open Access
24 Citations
5,985 Views
17 Pages

Mineralogical and Geochemical Characteristics of Triassic Lithium-Rich K-Bentonite Deposits in Xiejiacao Section, South China

  • Yongjie Lin,
  • Mianping Zheng,
  • Yongsheng Zhang,
  • Enyuan Xing,
  • Simon A. T. Redfern,
  • Jianming Xu,
  • Jiaai Zhong and
  • Xinsheng Niu

16 January 2020

Widespread alteration in the Early–Middle Triassic volcanic ash of the Xiejiacao section, south China, has resulted in significant occurrences of lithium-rich K-bentonite deposits with economic potential. Detailed mineralogical and geochemical...

  • Article
  • Open Access
1 Citations
631 Views
20 Pages

9 December 2025

For the first time, the same fish species is recorded from Triassic rocks at both ends of the Tethys, namely, Thoracopterus wushaensis Tintori et al., 2012. First described from the southwestern China Xingyi Fauna (late Ladinian, Middle Triassic), it...

  • Article
  • Open Access
7 Citations
3,611 Views
24 Pages

27 April 2023

The Central Asian Orogenic Belt (CAOB) is the world’s largest accretionary orogenic belt, and its formation is related to the closure of the Paleo-Asian Ocean (PAO). However, the closure time and style of the PAO remain controversial. To addres...

  • Article
  • Open Access
1 Citations
1,348 Views
17 Pages

27 June 2024

Large volumes of Early Mesozoic intermediate to basic igneous rocks related to the evolution of the Paleo-Tethys Ocean are exposed in the East Kunlun Orogenic Belt (EKOB). The petrography, geochemistry, and results of zircon U-Pb dating of Defusheng...

  • Article
  • Open Access
2 Citations
2,505 Views
17 Pages

15 October 2022

The Carboniferous–Triassic period was an important stage of global sea–land transformation, with coal formation in the Carboniferous, biological extinction at the end of the Permian, and global drought in the Triassic. The MS-1 well in th...

  • Article
  • Open Access
3 Citations
4,194 Views
20 Pages

25 October 2022

Fishes from the uppermost Norian Fuchsberg Quarry near Seinstedt are represented by two taxa that we interpret as a teleosteomorph (complete specimens) and actinistian (scales). Seinstedtia parva gen. et sp. nov. is described; although it was propose...

  • Article
  • Open Access
14 Citations
3,282 Views
18 Pages

Geometric and Fractal Characterization of Pore Systems in the Upper Triassic Dolomites Based on Image Processing Techniques (Example from Žumberak Mts, NW Croatia)

  • Ivica Pavičić,
  • Zlatko Briševac,
  • Anja Vrbaški,
  • Tonći Grgasović,
  • Željko Duić,
  • Deni Šijak and
  • Ivan Dragičević

9 July 2021

Karst aquifers are important sources of thermal and groundwater in many parts of the world, such as the Alpine–Dinaric–Carpathian region in Europe. The Upper Triassic dolomites are regionally recognized thermal and groundwater aquifers but also hydro...

  • Feature Paper
  • Article
  • Open Access
16 Citations
25,071 Views
59 Pages

3 November 2021

The Late Triassic (Norian) outcrops of the Malmros Klint Formation, Jameson Land (Greenland) have yielded numerous specimens of non-sauropod sauropodomorphs. Relevant fossils were briefly reported in 1994 and were assigned to Plateosaurus trossingens...

  • Article
  • Open Access
1,693 Views
18 Pages

8 March 2024

Owing to the paucity of research on synchronous mafic rocks in the Tarim Basin, the late Paleozoic–early Mesozoic tectonic development of this region is not well defined. The Halaqi region is situated on Tarim’s northwest edge, and numero...

  • Article
  • Open Access
722 Views
30 Pages

Petrology and Geochemistry Features of the Middle Triassic Anisian Shale in Sichuan Basin, South China: Implications for Climatic and Environmental Condition Change

  • Zhenjing Du,
  • Dongxia Chen,
  • Yuhan Huang,
  • Xiaomin Yang,
  • Yaodong Xu,
  • Guanbo Jiang,
  • Shilong Shi,
  • Bingjie Ma and
  • Fei Huo

21 November 2025

The Middle Triassic Anisian stage records a critical phase of marine ecosystem recovery after the Permian-Triassic mass extinction. The recent discovery of the Lei3 shale member within the predominantly carbonate Leikoupo Formation in the Sichuan Bas...

  • Article
  • Open Access
3 Citations
2,746 Views
22 Pages

19 August 2022

The evolution of the eastern Paleo-Asian Ocean (PAO) has controlled the formation of the southeastern Central Asian Orogenic Belt (CAOB). However, the evolution history and final closure time of the eastern PAO still remain controversial, which great...

  • Article
  • Open Access
1 Citations
1,202 Views
21 Pages

21 April 2025

The Doi Long Formation is the youngest record of Triassic deposits of the Lampang Group, Sukhothai Zone, central northern Thailand. The evolutionary history behind the presence of microbial limestone remains unknown, despite its high diversity and ab...

  • Article
  • Open Access
297 Views
13 Pages

25 November 2025

The Triassic Chang 6 reservoir in the Suijing Oilfield is characterized by poor reservoir quality, pronounced heterogeneity, well-developed fractures, and suboptimal well pattern configuration, which collectively impede the establishment of an effici...

  • Article
  • Open Access
1,250 Views
30 Pages

16 May 2025

Regolith-hosted rare-earth element (REE) deposits are some of the most important types of REE deposits. The relationship between Late Paleozoic and Early Mesozoic granite and regolith-hosted REE deposits is still poorly studied. Detailed geochronolog...

  • Article
  • Open Access
2 Citations
2,261 Views
23 Pages

The early Triassic (~250 Ma) hornblende gabbro from the Tengxian area of Yunkai Massif, South China, contains a mineral assemblage of clinopyroxene, hornblende, biotite, plagioclase, K-feldspar and quartz and accessory apatite, and zircon and ilmenit...

  • Article
  • Open Access
4 Citations
2,595 Views
20 Pages

2 January 2023

The East Kunlun Orogenic Belt is considered as one of the important gold mineralization regions in the Tethys tectonic domain. These orogenic gold deposits are related to intermediate-acid intrusions formed at the end of Paleo-Tethys evolution, but t...

  • Article
  • Open Access
2 Citations
1,976 Views
14 Pages

New Rock Magnetism and Magnetic Fabrics Studies on the Late Triassic Volcanic Rocks from Qaidam Block, Northern Tibetan Plateau

  • Ruiyang Chai,
  • Yanan Zhou,
  • Teng Wang,
  • Xin Cheng,
  • Bitian Wei,
  • Nan Jiang,
  • Dongmeng Zhang,
  • Longyun Xing,
  • Pengfei Wang and
  • Hanning Wu
  • + 2 authors

15 May 2024

The Qaidam Block, located at the northern Qinghai–Tibet Plateau, is a pivotal area in unraveling the closure time of the Kunlun Ocean basin which might have recorded the transformation process between the Proto-Tethys and Paleo-Tethys Ocean bas...

  • Article
  • Open Access
7 Citations
5,024 Views
18 Pages

15 February 2020

Within the Upper Triassic successions in the Iberian Basin (Spain), the occurrence of both idiomorphic bipyramidal quartz crystals as well as pseudohexagonal aragonite crystals are related to mudstone and evaporite bearing sequences. Bipyramidal-euhe...

  • Article
  • Open Access
2 Citations
2,232 Views
23 Pages

15 December 2023

The assemblage of oceanic islands and seamounts, arising from the widespread presence of mature oceans, plays a crucial role in reconstructing the evolutionary history of the paleoocean. Oceanic islands or seamounts within the Longmuco-Shuanghu metam...

  • Article
  • Open Access
2 Citations
3,867 Views
26 Pages

A study of Triassic sandstones in the central North Sea, UK, has shown that combined detrital zircon and apatite geochronology and apatite trace element analysis is a powerful tool for reconstructing provenance for sandstones with diagenetically impo...

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