Subjects -> EARTH SCIENCES (Total: 771 journals)
    - EARTH SCIENCES (527 journals)
    - GEOLOGY (94 journals)
    - GEOPHYSICS (33 journals)
    - HYDROLOGY (29 journals)
    - OCEANOGRAPHY (88 journals)

EARTH SCIENCES (527 journals)                  1 2 3 | Last

Showing 1 - 200 of 371 Journals sorted alphabetically
ACS Earth and Space Chemistry     Free   (Followers: 6)
Acta Brasiliensis     Open Access  
Acta Geochimica     Hybrid Journal   (Followers: 6)
Acta Geodaetica et Geophysica     Hybrid Journal   (Followers: 2)
Acta Geológica Lilloana     Open Access  
Acta Geophysica     Hybrid Journal   (Followers: 9)
Acta Geotechnica     Hybrid Journal   (Followers: 6)
Acta Meteorologica Sinica     Hybrid Journal   (Followers: 4)
Advances in High Energy Physics     Open Access   (Followers: 23)
Advances in Limnology     Full-text available via subscription   (Followers: 2)
Advances In Physics     Hybrid Journal   (Followers: 29)
Aeolian Research     Hybrid Journal   (Followers: 7)
African Journal of Aquatic Science     Hybrid Journal   (Followers: 17)
AGU Advances     Open Access  
Algological Studies     Full-text available via subscription   (Followers: 1)
All Earth     Open Access   (Followers: 2)
Alpine Botany     Hybrid Journal   (Followers: 4)
AMBIO     Hybrid Journal   (Followers: 12)
Anales del Instituto de la Patagonia     Open Access  
Andean geology     Open Access   (Followers: 10)
Annales Henri Poincaré     Hybrid Journal   (Followers: 2)
Annals of Geophysics     Open Access   (Followers: 12)
Annals of GIS     Open Access   (Followers: 30)
Annual Review of Marine Science     Full-text available via subscription   (Followers: 12)
Anthropocene     Hybrid Journal   (Followers: 6)
Anthropocene Review     Hybrid Journal   (Followers: 9)
Anuário do Instituto de Geociências     Open Access  
Applied Clay Science     Hybrid Journal   (Followers: 6)
Applied Computing and Geosciences     Open Access   (Followers: 3)
Applied Geochemistry     Hybrid Journal   (Followers: 14)
Applied Geomatics     Hybrid Journal   (Followers: 4)
Applied Geophysics     Hybrid Journal   (Followers: 11)
Applied Ocean Research     Hybrid Journal   (Followers: 6)
Applied Petrochemical Research     Open Access   (Followers: 2)
Aquatic Conservation Marine and Freshwater Ecosystems     Hybrid Journal   (Followers: 44)
Arctic Science     Open Access   (Followers: 7)
Arctic, Antarctic, and Alpine Research     Open Access   (Followers: 12)
arktos : The Journal of Arctic Geosciences     Hybrid Journal  
Artificial Intelligence in Geosciences     Open Access   (Followers: 6)
Artificial Satellites     Open Access   (Followers: 21)
Asia-Pacific Journal of Atmospheric Sciences     Hybrid Journal   (Followers: 21)
Asian Journal of Earth Sciences     Open Access   (Followers: 16)
Asian Journal of Physical and Chemical Sciences     Open Access   (Followers: 2)
Asian Review of Environmental and Earth Sciences     Open Access   (Followers: 1)
Atlantic Geology : Journal of the Atlantic Geoscience Society / Atlantic Geology : revue de la Société Géoscientifique de l'Atlantique     Open Access   (Followers: 10)
Atmosphere-Ocean     Full-text available via subscription   (Followers: 16)
Atmospheric and Climate Sciences     Open Access   (Followers: 30)
Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia     Hybrid Journal   (Followers: 10)
Austrian Journal of Earth Sciences     Open Access   (Followers: 1)
AWWA Water Science     Hybrid Journal   (Followers: 1)
Bonorowo Wetlands     Open Access  
Boreas: An International Journal of Quaternary Research     Hybrid Journal   (Followers: 13)
Brill Research Perspectives in Map History     Full-text available via subscription   (Followers: 1)
Bulletin of Earthquake Engineering     Hybrid Journal   (Followers: 10)
Bulletin of Geosciences     Open Access   (Followers: 11)
Bulletin of the Lebedev Physics Institute     Hybrid Journal  
Bulletin of the Seismological Society of America     Full-text available via subscription   (Followers: 26)
Bulletin of Volcanology     Hybrid Journal   (Followers: 22)
Canadian Mineralogist     Full-text available via subscription   (Followers: 5)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 18)
Carbonates and Evaporites     Hybrid Journal   (Followers: 1)
CATENA     Hybrid Journal   (Followers: 11)
Chemical Geology     Hybrid Journal   (Followers: 31)
Chinese Geographical Science     Hybrid Journal   (Followers: 6)
Ciencia del suelo     Open Access   (Followers: 1)
Ciencias Espaciales     Open Access  
Climate and Development     Hybrid Journal   (Followers: 32)
Coastal Management     Hybrid Journal   (Followers: 29)
Cogent Geoscience     Open Access  
Communications Earth & Environment     Open Access   (Followers: 2)
Comptes Rendus : Geoscience     Open Access   (Followers: 9)
Computational Geosciences     Hybrid Journal   (Followers: 17)
Computational Mathematics and Mathematical Physics     Hybrid Journal   (Followers: 5)
Computers and Geotechnics     Hybrid Journal   (Followers: 12)
Continental Shelf Research     Hybrid Journal   (Followers: 12)
Contributions to Mineralogy and Petrology     Hybrid Journal   (Followers: 11)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 3)
Coral Reefs     Hybrid Journal   (Followers: 22)
Cretaceous Research     Hybrid Journal   (Followers: 10)
Depositional Record     Open Access  
Développement durable et territoires     Open Access   (Followers: 2)
Diatom Research     Hybrid Journal   (Followers: 3)
Doklady Physics     Hybrid Journal   (Followers: 1)
Dynamics of Atmospheres and Oceans     Hybrid Journal   (Followers: 19)
E&S Engineering and Science     Open Access  
E3S Web of Conferences     Open Access  
Earth and Planetary Physics     Open Access   (Followers: 2)
Earth and Planetary Science Letters     Hybrid Journal   (Followers: 145)
Earth and Space Science     Open Access   (Followers: 26)
Earth Interactions     Open Access   (Followers: 10)
Earth Science Malaysia     Open Access  
Earth Science Research     Open Access   (Followers: 9)
Earth Sciences Pakistan     Open Access  
Earth Sciences Research Journal     Open Access  
Earth Surface Dynamics (ESurf)     Open Access   (Followers: 10)
Earth Surface Dynamics Discussions (ESurfD)     Open Access   (Followers: 1)
Earth Surface Processes and Landforms     Hybrid Journal   (Followers: 25)
Earth System Dynamics     Open Access   (Followers: 6)
Earth System Dynamics Discussions     Open Access   (Followers: 3)
Earth Systems and Environment     Hybrid Journal   (Followers: 3)
Earth's Future     Open Access   (Followers: 6)
Earth, Planets and Space     Open Access   (Followers: 77)
Earthquake Engineering and Engineering Vibration     Hybrid Journal   (Followers: 8)
Earthquake Research Advances     Open Access   (Followers: 1)
Earthquake Spectra     Hybrid Journal   (Followers: 20)
Ecohydrology     Hybrid Journal   (Followers: 9)
Ecological Questions     Open Access   (Followers: 5)
Electromagnetics     Hybrid Journal   (Followers: 13)
Energy Efficiency     Hybrid Journal   (Followers: 9)
Energy Exploration & Exploitation     Open Access   (Followers: 4)
Energy Geoscience     Open Access  
Environmental Earth Sciences     Hybrid Journal   (Followers: 29)
Environmental Geology     Hybrid Journal   (Followers: 25)
Environmental Geosciences     Full-text available via subscription   (Followers: 6)
Environmental Geotechnics     Hybrid Journal   (Followers: 6)
Environmental Processes : An International Journal     Hybrid Journal  
Erwerbs-Obstbau     Hybrid Journal  
Estuaries and Coasts     Hybrid Journal   (Followers: 22)
Estuarine, Coastal and Shelf Science     Hybrid Journal   (Followers: 41)
Estudios Geográficos     Open Access   (Followers: 1)
European Journal of Mineralogy     Hybrid Journal   (Followers: 12)
European Journal of Remote Sensing     Open Access   (Followers: 18)
Exploration Geophysics     Hybrid Journal   (Followers: 4)
Facies     Hybrid Journal   (Followers: 9)
FIGEMPA : Investigación y Desarrollo     Open Access   (Followers: 1)
Física de la Tierra     Open Access  
Folia Musei rerum naturalium Bohemiae occidentalis. Geologica et Paleobiologica     Open Access  
Forestry Chronicle     Full-text available via subscription   (Followers: 9)
Frontiers in Earth Science     Open Access   (Followers: 8)
Frontiers in Soil Science     Open Access  
Frontiers of Earth Science     Hybrid Journal   (Followers: 12)
Fundamental and Applied Limnology / Archiv für Hydrobiologie     Full-text available via subscription   (Followers: 3)
GEM - International Journal on Geomathematics     Hybrid Journal   (Followers: 1)
Geo-Marine Letters     Hybrid Journal   (Followers: 6)
Geoacta     Open Access   (Followers: 2)
GeoArabia     Hybrid Journal  
Geobiology     Hybrid Journal   (Followers: 8)
Geocarto International     Hybrid Journal   (Followers: 23)
Geochemical Perspectives     Hybrid Journal   (Followers: 2)
Geochemistry     Hybrid Journal   (Followers: 5)
Geochemistry : Exploration, Environment, Analysis     Hybrid Journal   (Followers: 6)
Geochemistry, Geophysics, Geosystems     Full-text available via subscription   (Followers: 35)
Geochimica et Cosmochimica Acta     Hybrid Journal   (Followers: 54)
Geochronology (GChron)     Open Access  
Geochronometria     Open Access   (Followers: 1)
Geoderma Regional : The International Journal for Regional Soil Research     Full-text available via subscription   (Followers: 4)
Geodynamics & Tectonophysics     Open Access   (Followers: 3)
Geoenvironmental Disasters     Open Access   (Followers: 3)
Geofluids     Open Access   (Followers: 5)
Geoforum     Hybrid Journal   (Followers: 25)
Geography and Natural Resources     Hybrid Journal   (Followers: 8)
GeoHazards     Open Access   (Followers: 2)
GeoHealth     Open Access  
Geoheritage     Hybrid Journal   (Followers: 1)
Geoinformatics & Geostatistics     Hybrid Journal   (Followers: 14)
Geologia USP : Série Científica     Open Access   (Followers: 1)
Geological Journal     Hybrid Journal   (Followers: 19)
Geological Magazine     Hybrid Journal   (Followers: 16)
Geology Today     Hybrid Journal   (Followers: 31)
Geology, Geophysics and Environment     Open Access   (Followers: 2)
Geomagnetism and Aeronomy     Hybrid Journal   (Followers: 3)
Geomatics, Natural Hazards and Risk     Open Access   (Followers: 13)
Geomechanics and Geophysics for Geo-Energy and Geo-Resources     Hybrid Journal  
Geomechanics for Energy and the Environment     Full-text available via subscription  
GEOmedia     Open Access   (Followers: 1)
Geomorphology     Hybrid Journal   (Followers: 33)
Geophysical & Astrophysical Fluid Dynamics     Hybrid Journal   (Followers: 8)
Geophysical Journal International     Hybrid Journal   (Followers: 40)
Geophysical Prospecting     Hybrid Journal   (Followers: 7)
Geophysics     Full-text available via subscription   (Followers: 19)
Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards     Hybrid Journal   (Followers: 8)
Geoscience Canada : Journal of the Geological Association of Canada / Geoscience Canada : journal de l'Association Géologique du Canada     Full-text available via subscription   (Followers: 6)
Geoscience Communication     Open Access  
Geoscience Data Journal     Open Access   (Followers: 5)
Geoscience Frontiers     Open Access   (Followers: 10)
Geoscience Letters     Open Access  
Geosciences     Open Access   (Followers: 3)
Geosciences Journal     Hybrid Journal   (Followers: 10)
Geoscientific Instrumentation, Methods and Data Systems     Open Access   (Followers: 2)
Geoscientific Instrumentation, Methods and Data Systems Discussions     Open Access   (Followers: 1)
Geoscientific Model Development     Open Access   (Followers: 8)
Geoscientific Model Development Discussions     Open Access  
Geostandards and Geoanalytical Research     Hybrid Journal   (Followers: 3)
Geosystem Engineering     Hybrid Journal  
Geosystems and Geoenvironment     Open Access  
Geotectonic Research     Full-text available via subscription   (Followers: 5)
Geotectonics     Hybrid Journal   (Followers: 9)
Glass Physics and Chemistry     Hybrid Journal   (Followers: 1)
Global and Planetary Change     Hybrid Journal   (Followers: 18)
Global Biogeochemical Cycles     Full-text available via subscription   (Followers: 17)
Gondwana Research     Hybrid Journal   (Followers: 10)
GPS Solutions     Hybrid Journal   (Followers: 28)
Grassland Science     Hybrid Journal  
Ground Water Monitoring & Remediation     Hybrid Journal   (Followers: 25)
Groundwater     Hybrid Journal   (Followers: 37)
Groundwater for Sustainable Development     Full-text available via subscription   (Followers: 5)
Helgoland Marine Research     Open Access   (Followers: 2)
History of Geo- and Space Sciences     Open Access   (Followers: 1)
Hydrobiologia     Hybrid Journal   (Followers: 21)
Hydrogeology Journal     Hybrid Journal   (Followers: 21)

        1 2 3 | Last

Similar Journals
Journal Cover
Geological Magazine
Journal Prestige (SJR): 0.966
Citation Impact (citeScore): 2
Number of Followers: 16  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0016-7568 - ISSN (Online) 1469-5081
Published by Cambridge University Press Homepage  [353 journals]
  • GEO volume 159 issue 6 Cover and Front matter

    • Free pre-print version: Loading...

      Pages: 1 - 2
      PubDate: 2022-05-12
      DOI: 10.1017/S0016756822000383
       
  • GEO volume 159 issue 6 Cover and Back matter

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      Pages: 1 - 2
      PubDate: 2022-05-12
      DOI: 10.1017/S0016756822000395
       
  • U–Pb geochronology of Upper Triassic – Lower Jurassic detrital
           sequences from SE margin of the South China Block: implications for
           Palaeo-Pacific subduction and tectonic evolution

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      Authors: Kong; Jin-Tao, Xu, Zhong-Jie, Tao, Guo-Zhi, Cheng, Ri-Hui, Wang, Liao-Liang
      Pages: 833 - 852
      Abstract: We performed U–Pb dating of detrital zircons and conducted petrological and whole-rock geochemical analyses to assess the provenance of the Upper Triassic – Lower Jurassic clastic rocks in the southeastern margin of the South China Block. Detrital zircon U–Pb ages are mainly classified into age groups of 2000–1700, 900–700, 490–390 and 280–210 Ma, consistent with derivation from the Jiangnan orogenic belt, Nanling Belt, as well as Wuyi and Yunkai domains. Lower Jurassic samples yield a special main age population of 200–190 Ma, and these detrital zircon grains have low Th/U and Nb/Hf ratios and high Th/Nb and Hf/Th ratios, showing they are derived from a continental magmatic arc. However, the cross-correlation and likeness coefficients of kernel density estimates of Upper Triassic and Lower Jurassic sandstones are 0.8608 and 0.8403, indicating that their populations are highly similar. Since the tectonic setting is the key factor in controlling the relationship between source and sink, the stable supply of identical provenance suggests that the tectonic setting did not significantly change during Late Triassic – Early Jurassic time. Sandstone petrography, regional facies distribution and the detrital zircon age patterns all reflect a consistent tectonic setting for the South China Block during Late Triassic – Early Jurassic time. The Palaeo-Pacific subduction therefore did not control the tectonic evolution of the South China Block until after the Early Jurassic Epoch.
      PubDate: 2022-01-31
      DOI: 10.1017/S0016756821001394
       
  • Pliocene–Quaternary seismogenic faults in the inner Northern Apennines
           (Valdelsa Basin, southern Tuscany) and their role in controlling the local
           seismicity

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      Authors: Mirabella; Francesco, Braun, Thomas, Brogi, Andrea, Capezzuoli, Enrico
      Pages: 853 - 872
      Abstract: Pliocene–Quaternary faults are relevant structures with which to constrain the seismotectonic context and contribute to the evaluation of the seismic hazard of a region. Many of these faults, however, do not show clear surface evidence even when releasing earthquakes. For these reasons they can be extremely dangerous as they receive relatively little attention and can be difficult to identify. From among the various surface geology studies and/or palaeoseismological investigations, we focus our attention on the integration of different datasets such as seismic reflection profiles, surface kinematic data and the relocation of seismological data, which make it possible to identify and characterize active faults whose dimension and earthquake potential would otherwise not be large enough to make them identifiable. We take as an example the Montespertoli NE-trending fault in southern Tuscany (central Italy) with which we associate the 2016 M=3.9 Castelfiorentino earthquake. This structure is part of a wider (in the order of 15–20 km) crustal-scale shear zone, which may be responsible for strong historical earthquakes in the area.
      PubDate: 2022-02-10
      DOI: 10.1017/S0016756822000036
       
  • The petrogenesis of Early–Middle Jurassic magmatism in southern and
           central Mexico and its role during the break-up of Western Pangaea

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      Authors: Parolari; Mattia, Martini, Michelangelo, Gómez-Tuena, Arturo, Ortega-Gutiérrez, Fernando, Errázuriz-Henao, Carlos, Cavazos-Tovar, José G.
      Pages: 873 - 892
      Abstract: Central and southern Mexico represents a strategic place to understand the dynamics of Pangaea break-up and its influences on the evolution of the Pacific margin of North America. Lower–Middle Jurassic volcano-sedimentary successions, and scarce magmatic rocks, crop out discontinuously across this region and have been interpreted either as a vestige of a continental arc or as several deposits of syn-rift magmatism. At present, their origin is controversial. Available geochemical data on these igneous rocks suggest that they represent almost pure crustal melts produced in a rift environment rather than in an arc. In fact, the studied rocks exhibit the high silica contents and moderate to strong peraluminous character typical of sediment melts. The enriched isotopic composition (high 86Sr/87Sr and low 143Nd/144Nd) and the age distributions of inherited zircon grains readily identify the widespread Upper Triassic metasedimentary sequences presently exposed in southwestern and central Mexico as the most likely crustal source of these Jurassic igneous rocks. Accordingly, we argue that these Early–Middle Jurassic magmas originated in a syn-rift igneous province associated with extensional-driven crustal attenuation in the context of Pangaea fragmentation. Our findings also constrain post-Pangaea subduction initiation to be younger than Middle Jurassic time in central and southern Mexico.
      PubDate: 2022-02-21
      DOI: 10.1017/S0016756822000061
       
  • Field observations of surface ruptures accompanying a tsunami and
           supershear earthquake along a plate boundary strike-slip fault

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      Authors: Li; Chuanyou, Liu, Jinrui, Ma, Jun, Su, Gang, Lan, Jian, Li, Xinnan, Ren, Zhikun, Ran, Hongliu
      Pages: 893 - 903
      Abstract: Strike-slip earthquakes near major subduction zones have received less attention than thrust or reverse earthquakes in subduction zone areas. The occurrence of the 2018 Palu Mw 7.5 earthquake in eastern Indonesia provides an unprecedented opportunity to investigate the characteristics of one of these events. The Palu earthquake occurred on the left-lateral, north–south-striking Palu–Koro fault, which is the main plate boundary structure accommodating the convergence between blocks in a triple junction area. It excited a significant tsunami, which unusually is associated with strike-slip earthquakes, and also ruptured at a supershear speed, which is mostly observed on strike-slip faults in continents. Based on our fieldwork, we speculate that the normal slip component of the offshore rupture section in Palu bay on the middle segment probably favours tsunami genesis. Our field investigation has revealed evidence of a simple geometry as well as slip partitioning of dip-slip and strike-slip motion on two subparallel strands on the main segment, both of which may have contributed to the supershear of the rupture propagation. Instead of only a transtensive behaviour of the middle segment, our results also illustrate the transpressional property of the northern and southern rupture segments, which shows more complex behaviour than that of a common continental strike-slip fault.
      PubDate: 2022-02-11
      DOI: 10.1017/S0016756822000012
       
  • Geochemistry and new zircon U–Pb geochronology of Mesoproterozoic
           Punugodu granite pluton, SE India: implications for anorogenic magmatism
           along the western margin of Nellore Schist Belt, India

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      Authors: Narshimha; Ch., Sesha Sai, V. V., Reddy, U. V. B., Vijaya Kumar, T., Babu, E. V. S. S. K., Sreenivas, B., Subramanyam, K. S. V.
      Pages: 904 - 924
      Abstract: We report a new zircon U–Pb age of 1257 ± 6 Ma for the Punugodu granite (PG) pluton in the Eastern Dharwar Craton (EDC), Southern India. The Mesoproterozoic PG is alkali feldspar hypersolvus granite emplaced at shallow crustal level, as evident from the presence of rhyodacite xenoliths and hornfelsic texture developed in the metavolcanic country rocks of the Neoarchaean Nellore Schist Belt (NSB). Geochemically, the PG is metaluminous, ferroan and alkali-calcic, and is characterized by high SiO2 and Na2O + K2O, Ga/Al ratios>2.6, high-field-strength elements and rare earth element (REE) contents with low CaO, MgO and Sr, indicating its similarity to anorogenic, alkali (A-type) granite. The highly fractionated REE patterns with negative europium anomalies of PG reflect its evolved nature and feldspar fractionation. Mafic (MME) to hybrid (HME) microgranular enclaves represent distinct batches of mantle-derived magmas that interacted, mingled and undercooled within the partly crystalline PG host magma. Felsic microgranular enclaves (FME) having similar mineralogical and geochemical characteristics to the host PG most likely represent fragments of marginal rock facies of the PG pluton. The PG appears to be formed from an oceanic island basalt (OIB)-like source in an anorogenic, within-plate setting. The emplacement of PG (c. 1257 Ma) in the vicinity of Mesoproterozoic Kanigiri Ophiolite (c. 1334 Ma) shows an age gap of nearly 77 Ma, which probably suggests PG emplacement in an extensional environment along a terrain boundary at the western margin of the Neoarchaean NSB in the EDC.
      PubDate: 2022-03-22
      DOI: 10.1017/S0016756822000073
       
  • Ordovician matground and mixground ecosystems in shoreface–offshore and
           barrier-island environments from Central Iran, northern Gondwana

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      Authors: Bayet-Goll; Aram
      Pages: 925 - 953
      Abstract: The shift of matground ecosystems to bioturbator-free settings was investigated in the Ordovician wave-dominated marine strata of the Shirgesht Formation in Central Iran. Ten ichnofabrics are recognized in shoreface–offshore and barrier-island sedimentary facies, representing a proximal-to-distal depositional trend along the studied profile. In the offshore settings, intensive burrowing on several tiers and bioirrigation, referred to the Thalassinoides (Th), Cruziana–Skolithos–Rosselia (CrSkRo), crowded Trichophycus (CT) and Cruziana–Helminthopsis (CrHe) ichnofabrics, prevented the development of matgrounds. As a result of the Ordovician radiation, progressive ecospace utilization by suspension-, deposit- and detritus-feeders, as represented by the Skolithos (Sk), Rosselia–Skolithos (RoSk), crowded Rosselia (CR) and Conichnus–Skolithos (CoSk) ichnofabrics, is regarded as a key factor for sediment mixing and reworking and thus disruption of the matgrounds in shoreface settings. However, the restriction on microbial growth was reduced in lower-offshore / shelf or tidal-flat and back-barrier settings, where Chondrites–Planolites (ChPl) and Planolites (Pl) ichnofabrics dominate. This restricted microbial growth resulted from physico-chemical stresses on infaunal communities, as shown by the low ichnodiversity, scattered burrowing, absence of complex tiering, and prevalence of simple feeding strategies. This study suggests that following the early Palaeozoic evolutionary radiations, a considerable increase in abundance of detritus-feeders, deposit-feeders, suspension-feeders, predators, vagile bilaterian metazoans and grazers in shallow-water benthic communities caused mat-building microorganisms to migrate into lower-offshore / shelf, tidal-flat and back-barrier settings, where colonization by burrowing organisms was delayed.
      PubDate: 2022-04-11
      DOI: 10.1017/S0016756822000097
       
  • High morphological disparity of neuropteran larvae during the Cretaceous
           revealed by a new large species

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      Authors: Luo; Cihang, Liu, Hua, Jarzembowski, Edmund A.
      Pages: 954 - 962
      Abstract: The Mesozoic is considered as the ‘golden age’ for the diversification of Neuroptera (lacewings), and many unusual lacewing larvae have been discovered in Cretaceous amber. However, little is known about their early evolution because of the rarity of fossils. Herein, we describe a new genus and species, Kuafupolydentes hui gen. et sp. nov., one of the biggest lacewing larvae from the Cretaceous known so far, based on a well-preserved specimen from mid-Cretaceous Kachin amber (99 Ma). The new larva is characterized by its large size, each stylet with eight short and blunt teeth, robust and long antennae, and long and robust legs with continuous tarsus and tibia and enlarged claws. It can be considered as an early representative of the antlion clade, Myrmeleontiformia. We suggest that the new larva is also an ambush predator like extant antlions, but it might have used a different strategy to kill large prey. Some of the morphological characters of K. hui are unknown in any extant lacewings and suggest a greater morphological disparity of Neuroptera during the Cretaceous.
      PubDate: 2022-04-04
      DOI: 10.1017/S0016756822000176
       
  • Variation of lacustrine carbonate deposition in the Eocene Dongying
           Depression and its comparison with Holocene environments

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      Authors: Wu; Jing, Liang, Chao, Yang, Renchao, Xie, Jun
      Pages: 963 - 980
      Abstract: The sedimentary characteristics and preservation potential of lacustrine carbonates provide fundamental information on climate change. The lacustrine carbonate deposition in the Eocene Dongying Depression was investigated using a combination of mineralogical, petrological and geochemical analyses. Micritic calcite/dolomite, granular calcite, columnar calcite, calcareous shell fragments and reworked detrital calcite were identified. Varying patterns of carbonates (VPC) including lithofacies, geochemical indicators and carbonate distribution were revealed in the Dongying Depression: (i) carbonates hardly precipitate in the nearshore area (average 12 wt %); (ii) carbonate content is high (average 53 wt %) in the shallow lake and (iii) gradually decreases to reach a minimum (average 24 wt %) in the deeper part of the lake. Comparison of VPC in four Holocene lakes (the Qinghai Lake and Barkol Lake in China, Oro Lake in Canada and Montcortès Lake in Spain) with the Dongying Depression suggests that four distinct lake stages were developed, namely the terrigenous clastic/gypsum-rich, carbonate-rich, carbonate-decreasing and carbonate-poor stages. A depositional model of lacustrine carbonates influenced by detrital influx, climate, palaeoproductivity and salinity is developed. This study contributes to the understanding of the genetic mechanisms of lacustrine carbonate deposition to reconstruct environmental changes.
      PubDate: 2022-03-30
      DOI: 10.1017/S0016756822000103
       
  • Ore genesis of the Huangshaping skarn W–Mo–Pb–Zn deposit, southern
           Hunan Province, China: insights from in situ LA-MC-ICP-MS sulphur isotopic
           compositions

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      Authors: Ding; Teng, Tan, Tingting, Wang, Jia, Ma, Dongsheng, Lu, Jianjun, Zhang, Rongqing, Wu, Bin
      Pages: 981 - 995
      Abstract: The Huangshaping deposit is unique in southern Hunan Province, China, as it hosts economic reserves of both W–Mo and Pb–Zn mineralization, which are usually associated with granite and granodiorite porphyry in this area, respectively. This study reports results of in situ LA-MC-ICP-MS sulphur isotopic composition analyses conducted on sulphides from both W–Mo and Pb–Zn mineralization from the Huangshaping deposit with the aim of constraining ore genesis for this deposit. All samples from the proximal W–Mo mineralization have relatively uniform and high δ34S values (8.7 ‰ to 16.0 ‰), close to the range for carbonate sediments in this deposit (13.8 ‰ to 18.1 ‰). These patterns suggest that the granite porphyry in this deposit was the sulphur source for W–Mo mineralization, and that the assimilation of evaporite from the carbonate sediments led to the high δ34S values of the granite porphyry. Sulphides from the Pb–Zn mineralization have δ34S values (2.2 ‰ to 10.3 ‰) lower than those of the W–Mo mineralization, and generally increase in this paragenetic order, with the lowest δ34S values being similar to those of the basement (3.8 ‰ to 7.7 ‰). These patterns indicate that the original sulphur for the Pb–Zn mineralization was most likely derived from the basement, with input of sulphur from the carbonate sediments increasing during the evolution of ore-forming fluids. On the basis of the measured sulphur isotopic compositions, it is suggested that the ore-forming materials for the W–Mo mineralization were derived from the granite porphyry, whereas ore-forming materials extracted from the basement dominated the Pb–Zn mineralization.
      PubDate: 2022-04-07
      DOI: 10.1017/S0016756822000188
       
  • Late Triassic dinosaur tracks from Penarth, south Wales

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      Authors: Falkingham; Peter L., Maidment, Susannah C. R., Lallensack, Jens N., Martin, Jeremy E., Suan, Guillaume, Cherns, Lesley, Howells, Cindy, Barrett, Paul M.
      Pages: 821 - 832
      Abstract: Evidence of Late Triassic large tetrapods from the UK is rare. Here, we describe a track-bearing surface located on the shoreline near Penarth, south Wales, United Kingdom. The total exposed surface is c. 50 m long and c. 2 m wide, and is split into northern and southern sections by a small fault. We interpret these impressions as tracks, rather than abiogenic sedimentary structures, because of the possession of marked displacement rims and their relationship to each other with regularly spaced impressions forming putative trackways. The impressions are large (up to c. 50 cm in length), but poorly preserved, and retain little information about track-maker anatomy. We discuss alternative, plausible, abiotic mechanisms that might have been responsible for the formation of these features, but reject them in favour of these impressions being tetrapod tracks. We propose that the site is an additional occurrence of the ichnotaxon Eosauropus, representing a sauropodomorph trackmaker, thereby adding a useful new datum to their sparse Late Triassic record in the UK. We also used historical photogrammetry to digitally map the extent of site erosion during 2009–2020. More than 1 m of the surface exposure has been lost over this 11-year period, and the few tracks present in both models show significant smoothing, breakage and loss of detail. These tracks are an important datapoint for Late Triassic palaeontology in the UK, even if they cannot be confidently assigned to a specific trackmaker. The documented loss of the bedding surface highlights the transient and vulnerable nature of our fossil resources, particularly in coastal settings, and the need to gather data as quickly and effectively as possible.
      PubDate: 2021-12-29
      DOI: 10.1017/S0016756821001308
       
 
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