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215 Results Found

  • Article
  • Open Access
1 Citations
2,430 Views
17 Pages

30 August 2023

The Devonian–Carboniferous boundary is one of the most important turning points in geological history, marked by the Late Paleozoic Ice Age and Late Devonian extinction. This study investigates the carbon isotope stratigraphy across the Devonia...

  • Article
  • Open Access
517 Views
17 Pages

30 January 2026

“Placoderm” and sarcopterygian fishes dominated Devonian waters. Following the end-Devonian crisis, actinopterygians rapidly became major contributors to vertebrate diversity. This transition constitutes the first major diversification ev...

  • Article
  • Open Access
12 Citations
5,948 Views
25 Pages

Running across the Silurian/Devonian Boundary along Northern Gondwana: A Conodont Perspective

  • Annalisa Ferretti,
  • Maria Giovanna Corriga,
  • Ladislav Slavík and
  • Carlo Corradini

The Global Stratotype Section and Point (GSSP) of the Silurian/Devonian boundary, Lower Devonian Series and Lochkovian Stage was formally placed in 1977 at Klonk, in the Czech Republic, at the first appearance of the graptolite Uncinatograptus unifor...

  • Article
  • Open Access
3 Citations
2,893 Views
11 Pages

30 November 2021

Morphology and nomenclature are essential issues of botany, in which both extant and fossil plant taxa follow the same nomenclature code. Devonian (419.2–358.9 Ma) herbaceous lycopsid Barsassia, one of the earliest coal-forming plants in geolog...

  • Article
  • Open Access
2 Citations
1,541 Views
24 Pages

28 January 2025

Lithuania is a Baltic European country which shares borders with Poland, Belarus, Latvia, and Russia and has a geothermal anomaly in the southwestern region. It consists of two main geothermal complexed, i.e., Devonian and Cambrian with a temperature...

  • Article
  • Open Access
2,103 Views
20 Pages

30 June 2025

Macropetalichthys rapheidolabis Norwood and Owen, 1846 (Placodermi: Petalichthyida), type species of Macropetalichthys Norwood and Owen, 1846, was based on a single cranial roof from the Devonian of southeastern Indiana. Poor preservation, and later...

  • Article
  • Open Access
2 Citations
1,740 Views
16 Pages

8 May 2024

Forests appeared during the Middle to Late Devonian, but Devonian forests and their compositions are still rarely known. Xinhang forest was reported as the largest Devonian forest, with lycopsid trees of Guangdedendron micrum Wang et al. A fern-like...

  • Article
  • Open Access
2 Citations
1,769 Views
20 Pages

25 May 2025

John Strong Newberry described three species of the lobe-fin fish Onychodus (Osteichthyes, Sarcopterygii, Onychodontida) based on parasymphysial teeth, or tusks. Two species, Onychodus sigmoides Newberry, 1857 (type species of the genus) and Onychodu...

  • Article
  • Open Access
5 Citations
2,912 Views
16 Pages

21 October 2022

South China displays Devonian strata with well-exposed outcrops and is regarded as a diversity hotspot of Late Devonian lycopsids. The heterosporous lycopsid Sublepidodendron grabaui has been studied for over ten years, with its general morphology, a...

  • Article
  • Open Access
1,500 Views
19 Pages

The Petrogenesis of Devonian Volcanism and Its Tectonic Significance in the Kalatag Area, Eastern Tianshan, Xinjiang, China

  • Zhijie Ma,
  • Fengmei Chai,
  • Mingjian Cao,
  • Xiaodong Song,
  • Haipei Wang,
  • Dongmei Qi and
  • Qigui Mao

24 November 2024

The Kalatag mineralization belt is an important metallogenic belt of polymetallic mineral deposits in the northern part of eastern Tianshan, and its age and tectonic setting are still controversial. We identified a set of Devonian volcanic rocks host...

  • Article
  • Open Access
729 Views
16 Pages

New Record of the Hueberia from the Posongchong Formation, Pragian Stage, Lower Devonian Series in the Bainiuchang Area, Southeastern Yunnan, China

  • Yukai Hu,
  • Shitao Zhang,
  • Liurunxuan Chen,
  • Xianchao Chen,
  • Shangyunzhi Xiao,
  • Haonan Yin,
  • Ruohan Zuo,
  • Tao Wang and
  • Xiaoqi Yang

24 October 2025

The Posongchong Flora is an important window for understanding early vascular plant evolution. During a recent investigation of the Feigucun Section in the Bainiuchang area, Southeastern Yunnan, the author’s team discovered a large number of pl...

  • Article
  • Open Access
645 Views
23 Pages

26 September 2025

Subduction of the South Tianshan Ocean caused widespread Devonian magmatism, lithospheric deformation, and thinning along the south margin of the Central Tianshan Belt. However, the details of this subduction process remain elusive. This study presen...

  • Article
  • Open Access
3 Citations
2,741 Views
16 Pages

Early Devonian Arc-Related Volcanic Rocks in the Haerdaban, North Margin of the Yili Block: Constraint on the Southward Subduction of the Junggar Ocean

  • Youxin Chen,
  • Shengqiang Zhu,
  • Xianzhi Pei,
  • Lei He,
  • Jun Zhao,
  • Bate Bulong,
  • Meng Wang,
  • Shaowei Zhao and
  • Hai Zhou

10 November 2021

The origin and tectonic implication of Early–Middle Devonian magmatism in the northern margin of YB (Yili Block) remain enigmatic and are important for understanding Late Paleozoic evolution of the Junggar Ocean and southern Kazakhstan Orocline. Here...

  • Article
  • Open Access
10 Citations
7,771 Views
17 Pages

23 December 2015

Progressive biomineralization of a skeleton occurs during ontogeny in most animals. In fishes, larvae are poorly mineralized, whereas juveniles and adults display a progressively more biomineralized skeleton. Fossil remains primarily consist of adult...

  • Article
  • Open Access
14 Citations
7,621 Views
37 Pages

Many freshwater bivalves restore themselves to the sediment water interface after burial by upward escape burrowing. We studied the escape burrowing capacity of two modern unionoids, Elliptio complanata and Pyganodon cataracta and the invasive freshw...

  • Article
  • Open Access
3 Citations
1,943 Views
27 Pages

23 June 2024

This paper presents a detailed study including LA-ICP-MS zircon U-Pb dating, geochemical, zircon Hf isotope, and whole rock Sr-Nd isotope analysis of magmatic rocks from the Yitong County, Jilin Province, NE China. These data are used to better const...

  • Article
  • Open Access
1 Citations
2,204 Views
20 Pages

17 August 2024

The Uhelchulu quartz diorite-granodiorite intrusions in Xiwuqi, Inner Mongolia, are exposed along the northwestern margin of the Xilinhot microcontinental block, located within the central and eastern parts of the southeastern Hegenshan suture zone....

  • Article
  • Open Access
1 Citations
1,911 Views
16 Pages

28 July 2023

Northeast China occupies the majority of the eastern Central Asian Orogenic Belt, which mainly consists of continental blocks and accretionary terranes. The Devonian was a tectonic quiet period in the NE China region due to a lack of tectono-magmatis...

  • Article
  • Open Access
18 Citations
5,859 Views
52 Pages

7 February 2020

Core samples from two deep boreholes were analyzed for petrographic, stable and Sr isotopes, fluid inclusion microthermometry and major, minor, trace and rare-earth elements (REE) of different types of dolomite in the Silurian and Devonian carbonates...

  • Review
  • Open Access
2 Citations
4,646 Views
35 Pages

Petroleum Systems of the Shu-Sarysu Basin, Kazakhstan: A Review of Devonian–Permian Gas Potential

  • Almas Zhumagulov,
  • Auez Abetov,
  • Mehrdad T. Manzari and
  • Jamilyam Ismailova

The Shu-Sarysu Basin in central-southern Kazakhstan remains one of the underexplored gas-prone provinces, with 12 discovered gas fields including Amangeldy (884 Bcf) and Pridorozhnoye (225 Bcf). In the context of global energy transition, such basins...

  • Article
  • Open Access
1 Citations
1,330 Views
17 Pages

11 November 2024

We conducted a study on the petrology, geochemistry, and zircon U–Pb dating of Late Devonian intrusive rocks in the Tulargen area of the Eastern Tianshan Orogenic Belt, Xinjiang, China. These intrusive rocks primarily consist of gabbro (382 &pl...

  • Article
  • Open Access
1 Citations
898 Views
22 Pages

10 June 2025

The Southern Beishan Orogenic Belt (SBOB), an integral part of the Southern Central Asian Orogenic Belt (CAOB), is characterized by extensive Late Paleozoic magmatism. These igneous rocks are the key to studying the tectonic evolution process and the...

  • Article
  • Open Access
1 Citations
2,550 Views
16 Pages

28 March 2023

Studies on post-collisional magmatic rocks can provide key clues to researching the crust–mantle interactions and the tectonic evolution of collisional orogenic belts. This study investigated a suite of newly discovered mafic intrusions in the...

  • Article
  • Open Access
1 Citations
2,121 Views
17 Pages

2 June 2023

The Xinghongpu Formation is very important for understanding the Devonian tectonic evolution of the South Qinling orogenic belt. Geochemical, detrital zircon U-Pb-Hf isotopic studies were carried out on the Late Devonian metasedimentary rocks of the...

  • Article
  • Open Access
7 Citations
2,722 Views
18 Pages

26 October 2022

Palaeozoic fern-like plants show great diversity in their morphology and/or anatomy. Within this group, a novel taxon, Xinhangia spina gen. et sp. nov., is now reported from the Upper Devonian (Famennian) Wutong Formation of Anhui Province, China. Th...

  • Article
  • Open Access
2 Citations
1,468 Views
20 Pages

5 September 2024

The main ocean–continent transformation stage of the Qinling and Qilian conjunction zone happened in the Early Paleozoic with the occurrence of a lot of subduction–collision–related magmatic rocks. However, there is still considerab...

  • Article
  • Open Access
501 Views
28 Pages

1 December 2025

The Devonian–Permian succession of the Tasbulak Trough in the Shu–Sarysu Basin contains confirmed gas shows (wells 462, 1-P Izykyr, 1-P Sokyr-Tobe, and 1-P Kamenistaya) and a sedimentary cover exceeding 5500 m but still lacks a unified 3D...

  • Article
  • Open Access
10 Citations
2,494 Views
17 Pages

Late Devonian A-Type Granites from the Beishan, Southern Central Asia Orogenic Belt: Implications for Closure of the Paleo-Asia Ocean

  • Erteng Wang,
  • Xinwei Zhai,
  • Wanfeng Chen,
  • Lei Wu,
  • Gaorui Song,
  • Yun Wang,
  • Zhiang Guo,
  • Jiaolong Zhao and
  • Jinrong Wang

18 April 2023

The closing time of the Paleo-Asian Ocean (PAO) has long been in the focus of research as well as of controversial debates. The Paleozoic A-type granites distributed in the Beishan Orogenic Belt (BOB) at the southern margin of the Central Asian Oroge...

  • Article
  • Open Access
4 Citations
2,119 Views
21 Pages

12 October 2022

The Tannuola terrane, located in the northern Central Asian Orogenic Belt, comprises magmatic rocks, attributed to island-arc and collisional settings during the Early Cambrian to the Late Ordovician. However, zircon U-Pb age, geochemical, and Sr-Nd...

  • Article
  • Open Access
7 Citations
3,483 Views
13 Pages

25 November 2021

The results of a laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb dating and a Hf isotope study of zircon crystals separated from small eclogite xenoliths found in Devonian kimberlites within the Prypyat horst, Ukrai...

  • Article
  • Open Access
2 Citations
4,352 Views
19 Pages

Middle Devonian actinopterygians from Lithuania and Belarus

  • Darja Dankina,
  • Jonas Šečkus and
  • Dmitry P. Plax

12 July 2024

In the Baltic States and Belarus, the Middle Devonian period is characterised by an abundant fossil record of invertebrates such as scolecodonts, brachiopods, ostracods, trilobites, bivalves, crinoids, gastropods, and tentaculites. On the other hand,...

  • Article
  • Open Access
7 Citations
3,486 Views
12 Pages

1 October 2020

We present new data on the tectonic evolution of north-eastern Siberia using an integrated provenance analysis based on U–Pb detrital zircon dating and sandstone petrography of Devonian sedimentary strata. Our petrographic data suggest that Upp...

  • Article
  • Open Access
17 Citations
76,840 Views
54 Pages

21 February 2023

Dunkleosteus terrelli, an arthrodire placoderm, is one of the most widely recognized fossil vertebrates due to its large size and status as one of the earliest vertebrate apex predators. However, the exact size of this taxon is unclear due to its hea...

  • Article
  • Open Access
2 Citations
2,461 Views
17 Pages

18 December 2020

In view of the disastrous air pollution in the Silesian–Kraków region, reducing emissions from the combustion of conventional fuels is a particularly important issue. Geothermal energy is among the clean and renewable sources of heat tha...

  • Article
  • Open Access
5 Citations
2,333 Views
17 Pages

Low-Temperature Fluorocarbonate Mineralization in Lower Devonian Rhynie Chert, UK

  • John Parnell,
  • Temitope O. Akinsanpe,
  • John W. Still,
  • Andrea Schito,
  • Stephen A. Bowden,
  • David K. Muirhead and
  • Joseph G. T. Armstrong

25 April 2023

Rare earth element (REE) fluorocarbonate mineralization occurs in lacustrine shales in the Lower Devonian Rhynie chert, Aberdeenshire, UK, preserved by hot spring silicification. Mineralization follows a combination of first-cycle erosion of granite...

  • Article
  • Open Access
5 Citations
2,510 Views
12 Pages

The Devonian–Carboniferous transition was marked by a series of perturbations in the geological and biological evolution. The palaeontological data from Transcaucasia allowed the bryozoan diversity dynamics on the northern Gondwanan margin (sou...

  • Article
  • Open Access
4 Citations
2,047 Views
30 Pages

25 August 2023

Owing to tectonic, magmatic, and metamorphic controls, pegmatites associated with different spatiotemporal distributions exhibit varying mineralisation characteristics. The petrogenesis of pegmatites containing rare metals can improve the understandi...

  • Feature Paper
  • Article
  • Open Access
1 Citations
5,127 Views
22 Pages

13 September 2024

Uruguayan ammonoids are preserved in phosphate and siderite nodules found at the basalmost tillite-like conglomerates of the San Gregorio Formation. This lithostratigraphic unit was deposited under glacial conditions and its age (as well as that of t...

  • Article
  • Open Access
4 Citations
2,994 Views
18 Pages

Fluid Properties and Genesis of Dolomites in the Devonian Guanwushan Formation of Upper Yangtze Platform, SW China

  • Shuguang Huang,
  • Mingcai Hou,
  • Anqing Chen,
  • Shenglin Xu,
  • Benjian Zhang,
  • Yuwei Deng and
  • Yu Yu

3 March 2022

The Guanwushan Formation (GWSF) of Devonian dolomite are extensively developed in the northwest of Sichuan Basin in the Upper Yangtze region, but the properties of dolomitization fluid and the geneses are still unclear. Three types of dolomites can b...

  • Article
  • Open Access
1,758 Views
24 Pages

28 October 2023

The Late Paleozoic tectonic evolution of the Xing’an block in the eastern Central Asian orogenic belt has long been the subject of debate. In this paper, a comprehensive study of U-Pb zircon ages, Lu-Hf isotopes and whole-rock elemental analyse...

  • Article
  • Open Access
52 Citations
6,126 Views
15 Pages

Evaluation of the Total Organic Carbon (TOC) Using Different Artificial Intelligence Techniques

  • Ahmed Abdulhamid Mahmoud,
  • Salaheldin Elkatatny,
  • Abdulwahab Z. Ali,
  • Mohamed Abouelresh and
  • Abdulazeez Abdulraheem

13 October 2019

Total organic carbon (TOC) is an essential parameter used in unconventional shale resources evaluation. Current methods that are used for TOC estimation are based, either on conducting time-consuming laboratory experiments, or on using empirical corr...

  • Review
  • Open Access
1 Citations
2,185 Views
25 Pages

7 November 2024

Clam shrimps are one of the most common and representative invertebrates in continental strata and are endowed with important biostratigraphic and paleoecological values. The genus Euestheria is one of the most common clam shrimp taxa that has been r...

  • Review
  • Open Access
1 Citations
5,073 Views
97 Pages

Coral reefs are among the most important marine habitats but face significant threats from anthropogenic sources, including climate change. This paper reviews and compares the modern Great Barrier Reef Province and the 360-million-year-old Devonian G...

  • Article
  • Open Access
6 Citations
2,838 Views
26 Pages

10 April 2023

The transition from the Proto- to the Paleo-Tethys is still a controversial issue. This study reports a new petrology, zircon U–Pb geochronology, and whole-rock geochemistry of volcanic rocks from the Maoniushan Formation in the Nankeke area, n...

  • Article
  • Open Access
3 Citations
3,629 Views
20 Pages

27 June 2020

Ordovician-Silurian subduction, Early Devonian arc-contient collision and followed post-collision extension are recorded in the north of the North China Craton. Most previous research has focused on the first two processes. Discussion on the post-col...

  • Article
  • Open Access
2 Citations
1,673 Views
24 Pages

12 July 2024

Prospecting efforts to located Au mineralization within the Altai-Sayan fold area (ASFA) over previous decades have revealed that Devonian epithermal Au-Ag mineralization is more widespread than previously recognized. The preservation of this type of...

  • Review
  • Open Access
8 Citations
2,555 Views
15 Pages

26 March 2024

Lithuania is located on the East of Baltic sedimentary basin and has a geothermal anomaly situated in the southwestern region of the country. There are two primary geothermal complexes within the anomaly, composed of Cambrian and Devonian aquifers. T...

  • Communication
  • Open Access
6 Citations
2,649 Views
7 Pages

New Marine Geoheritage from the Russian Altai

  • Jaroslav M. Gutak,
  • Dmitry A. Ruban and
  • Natalia N. Yashalova

Marine geoheritage comprises unique geological features of modern and ancient seas and oceans. The Russian Altai (southern Siberia) is a vast and geologically rich area, which was covered by a marginal sea of the Panthalassa Ocean in the Devonian. Ne...

  • Article
  • Open Access
1,061 Views
29 Pages

Paleo-Asian Ocean Ridge Subduction: Evidence from Volcanic Rocks in the Fuyun–Qinghe Area, Southern Margin of the Chinese Altay

  • Jixu Liu,
  • Cui Liu,
  • Qing Liu,
  • Zhaohua Luo,
  • Yong Liu,
  • Chenghao Zhou,
  • Xu Guo,
  • Xianghui Yu and
  • Miao Wang

28 March 2025

The Chinese Altay is located in the western segment of the Central Asian Orogenic Belt (CAOB) and preserves critical records of the Paleo-Asian Ocean (PAO) Plate evolution during the Paleozoic era. This region also hosts significant mineral deposits,...

  • Article
  • Open Access
2 Citations
2,900 Views
18 Pages

9 July 2022

The Jinba deposit is an orogenic gold deposit located in the Markakuli shear zone, in the southern part of the Altay orogenic belt, northwestern China. Several granite and diorite dykes are present in the area of the mine, with ore bodies occurring i...

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