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Articles de revues sur le sujet « Paleontology Cambrian »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 25 juillet 2024

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1

Vidal, Gonzalo. "Proterozoic and Cambrian bioevents." Spanish Journal of Palaeontology 13, no. 3 (February 27, 2022): 11. http://dx.doi.org/10.7203/sjp.23973.

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Hinz-Schallreuter, Ingelore. "Ostracodes from the Middle Cambrian of Australia." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 188, no. 3 (September 2, 1993): 305–26. http://dx.doi.org/10.1127/njgpa/188/1993/305.

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3

Landing, Ed, and Guy M. Narbonne. "Scenella and “a chondrophorine (medusoid hydrozoan) from the basal Cambrian (Placentian) of Newfoundland”." Journal of Paleontology 66, no. 2 (March 1992): 338. http://dx.doi.org/10.1017/s0022336000033837.

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In a recent article, Narbonne et al. (1991) documented that the stratigraphic range of the chondrophorine Kullingia delicata continues above the the uppermost Precambrian (Vendian) into the lowermost Cambrian (Placentian Series) of the Avalonian faunal province. The revised text published in the Journal of Paleontology includes several references to Scenella Billings, 1872, as a Cambrian chondrophorine. This classification is in error and unfortunately serves to reinforce several recent reports that conclude that Scenella is a chondrophorine rather than a helcionacean mollusk.

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4

Fortey, Richard A. "Late Cambrian trilobites from the Sultanate of Oman." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 194, no. 1 (November 28, 1994): 25–53. http://dx.doi.org/10.1127/njgpa/194/1994/25.

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Verma, Vishal, Birendra P. Singh, Om N. Bhargava, Ravi S. Chaubey, Radek Mikuláš, Olev Vinn, Subhay K. Prasad, Scott Morrison, and Deepak Kumar. "The ichnogenus Psammichnites in the Cambrian of the Zanskar region: biostratigraphic significance in the correlation of Tethyan Himalaya Cambrian sections, India." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 308, no. 3 (June 30, 2023): 247–65. http://dx.doi.org/10.1127/njgpa/2023/1140.

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Jago, James B., and Peter W. Haines. "Recent radiometric dating of some Cambrian rocks in southern Australia: relevance to the Cambrian time scale." Spanish Journal of Palaeontology 13, no. 3 (February 27, 2022): 115. http://dx.doi.org/10.7203/sjp.23984.

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Miller, Randall F. "Location of trace fossils and problematica of George Frederic Matthew from Part W, Treatise on Invertebrate Paleontology." Journal of Paleontology 70, no. 1 (January 1996): 169–71. http://dx.doi.org/10.1017/s0022336000023210.

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George frederic matthew studied the geology of eastern Canada during the late 1800's to early 1900's and became an authority on Cambrian paleontology. Matthew advised the Geological Survey of Canada as its Cambrian expert and published over 200 papers spanning topics from Precambrian stromatolites to Pennsylvanian arthropods to archaeology (Miller, 1988a; Landing and Miller, 1988). He described a number of trace fossils and problematica cited in Hantzschel (1975), but the location of some specimens and their status has been uncertain, sometimes considered missing. Most of the specimens have no

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Chang, Wen T. "Cambrian biogeography of the Perigondwana Faunal Realm." Spanish Journal of Palaeontology 13, no. 3 (February 27, 2022): 35. http://dx.doi.org/10.7203/sjp.23977.

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Chang, Wen T. "Cambrian correlation within the Perigondwana Faunal Realm." Spanish Journal of Palaeontology 13, no. 3 (February 27, 2022): 23. http://dx.doi.org/10.7203/sjp.23976.

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Waggoner, Ben, and James W. Hagadorn. "An unmineralized alga from the Lower Cambrian of California, USA." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 231, no. 1 (February 2, 2004): 67–83. http://dx.doi.org/10.1127/njgpa/231/2004/67.

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Elicki, Olaf. "Lower Cambrian carbonates from eastern Germany: Palaeontology, stratigraphy and palaeogeography." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 191, no. 1 (April 13, 1994): 69–93. http://dx.doi.org/10.1127/njgpa/191/1994/69.

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Alvaro, J. Javier, Blanca Bauluz, Sebastien Clausen, Lea Devaere, Andres Gil Imaz, Eric Monceret, and Daniel Vizcaino. "Stratigraphic review of the Cambrian-Lower Ordovician volcanosedimentary complexes from the northern Montagne Noire, France." Stratigraphy 11, no. 1 (2014): 83–96. http://dx.doi.org/10.29041/strat.11.1.04.

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The northern Montagne Noire possesses one of the most complete Cambrian-Lower Ordovician successions of West Gondwana. The strata are poorly fossiliferous, metamorphized and disturbed by Variscan tectonism, and their stratigraphic nomenclature dramatically multiplied by the designation of numerous informal units exclusively identifiable in their ownVariscan thrust slices and nappes. This paper presents an updated revision of lithostratigraphic units and volcanic complexes. Special attention is given to crosscutting relationships of the latter and the setting and age of fossiliferous phosphorit

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13

Kuzmina, T. V., A. A. Ratnovskaya, and A. A. Madison. "Lophophore Evolution from the Cambrian to the Present." Paleontological Journal 55, no. 10 (December 2021): 1109–40. http://dx.doi.org/10.1134/s0031030121100051.

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Geyer, Gerd, and Michael Streng. "Middle Cambrian pelecypods from the Anti-Atlas, Morocco." Spanish Journal of Palaeontology 13, no. 3 (February 27, 2022): 83. http://dx.doi.org/10.7203/sjp.23980.

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Bordonaro, Osvaldo Luis, and Eladio Liñán Guijarro. "Some middle Cambrian agnostoids from the Precordillera Argentina." Spanish Journal of Palaeontology 9, no. 1 (August 10, 2022): 105. http://dx.doi.org/10.7203/sjp.24355.

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Braddy, Simon J. "A new arthropod resting trace from the middle Cambrian of Texas." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 309, no. 3 (September 29, 2023): 291–300. http://dx.doi.org/10.1127/njgpa/2023/1163.

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Luzhnaya, E. A., E. A. Zhegallo, L. V. Zaitseva, and A. L. Ragozina. "Problematical Porifera from the Lower Cambrian of Western Mongolia." Палеонтологический журнал, no. 3 (May 1, 2023): 22–34. http://dx.doi.org/10.31857/s0031031x2303011x.

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From the lower part of the Tommotian Stage of the Lower Cambrian of Western Mongolia, ridge Hevte-Tsakhir-Nuruu described a new species of problematical microfossils of the genus Aetholicopalla Conway Morris in Bengtson et al., 1990, whose representatives are sometimes the dominants of the Early Cambrian taphocoenoses. A. grandipora sp. nov. – spheroidal organisms with initially carbonate (?) skeleton; planktonic and benthic forms described; the latter have a variable shape and attachment sites to the bottom substrate. The outer wall of the fossils is perforated, thin, double; the functional i

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18

Normile, D. "PALEONTOLOGY: China Clamps Down on Mining to Preserve Cambrian Site." Science 305, no. 5692 (September 24, 2004): 1893–94. http://dx.doi.org/10.1126/science.305.5692.1893.

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Amireh, B. S., W. Schneider, and A. M. Abed. "Diagenesis and burial history of the Cambrian-Cretaceous sandstone series in Jordan." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 192, no. 2 (July 7, 1994): 151–81. http://dx.doi.org/10.1127/njgpa/192/1994/151.

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Lipps, Jere H. "Neoproterozoic—Cambrian Biological Revolutions." Paleontological Society Papers 10 (November 2004): 1–4. http://dx.doi.org/10.1017/s1089332600002291.

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The Neoproterozoic—Cambrian biological and geological events between 630 to 530 or so million years ago, are among the most fascinating topics in life history today because the first animals appeared and radiated amidst environmental changes of major magnitude. Not only are paleontologists and geologists interested in these events, but so are the general public, biologists, and theologians, among others. Indeed, this interest was manifested in a cover story in Time Magazine (Nash, 1995), another in the National Geographic (Monastersky, 1998), and in newspapers and other outlets. It is an intri

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21

Mayoral, Eduardo, Eladio Liñán, José Antonio Gámez Vintaned, Fernando Muñiz, and Rodolfo Gozalo. "Stranded jellyfish in the lowermost Cambrian (Corduban) of Spain." Spanish Journal of Palaeontology 19, no. 2 (March 3, 2021): 191. http://dx.doi.org/10.7203/sjp.19.2.20531.

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Luzhnaya, E. A., E. A. Zhegallo, L. V. Zaitseva, and A. L. Ragozina. "Problematic Porifera from the Lower Cambrian of Western Mongolia." Paleontological Journal 57, no. 3 (June 2023): 256–69. http://dx.doi.org/10.1134/s0031030123030103.

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Korovnikov, I. V. "New Species of the Genus <i>Oryctocephalus</i> Walcott from the Middle Cambrian of the Siberian Platform." Палеонтологический журнал, no. 4 (July 1, 2023): 54–59. http://dx.doi.org/10.31857/s0031031x23040062.

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Two new species of trilobites of the Oryctocephalus Walcott, 1886 from the Amgan Stage of the Middle Cambrian of the Siberian Platform were described: Oryctocephalus doliformis sp. nov. and O. molodoensis sp. nov. wich were found in the middle part of the Kuonamka Formation in the Molodo and Muna Rivers sections.

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24

Stricanne, L., Th Servais, N. Talyzina, and M. Vanguestaine. "Reevaluation of the Late Cambrian - Early Ordovician acritarch Nellia acifera GOLUB & VOLKOVA." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 235, no. 1 (February 4, 2005): 87–112. http://dx.doi.org/10.1127/njgpa/235/2005/087.

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Palmer, Allison R. "Why is intercontinental correlation within the Lower Cambrian so difficult?" Spanish Journal of Palaeontology 13, no. 3 (February 27, 2022): 17. http://dx.doi.org/10.7203/sjp.23974.

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Guo, Junfeng, Jian Han, Heyo Van Iten, Zuchen Song, Yaqin Qiang, Wenzhe Wang, Zhifei Zhang, and Guoxiang Li. "A ten-faced hexangulaconulariid from Cambrian Stage 2 of South China." Journal of Paleontology 95, no. 5 (March 29, 2021): 957–64. http://dx.doi.org/10.1017/jpa.2021.25.

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AbstractHexangulaconulariids (Cambrian stages 1–2) are an extinct group of medusozoan polyps having a biradially symmetrical, fan-shaped periderm that is distinct from those of medusozoan polyps showing three-, four-, five-, or six-fold radial symmetry. Hexangulaconulariids exhibit substantial variation in gross morphology, including variation in the number of faces on each of the two major sides of the periderm. An intermediate taxon of hexangulaconulariids with ten faces (five on each major side) was expected. Here we describe a new hexangulaconulariid, Decimoconularia isofacialis new genus

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Álvaro, J. Javier, and Emmanuelle Vennin. "Benthic marine communities recorded in the Cambrian Iberian platform, NE Spain." Palaeontographica Abteilung A 262, no. 1-3 (July 30, 2001): 1–23. http://dx.doi.org/10.1127/pala/262/2001/1.

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Hoegen, J. von, B. Lemme, J. Zielinski, and R. Walter. "Cambrian and Lower Ordovician in the Stavelot-Venn Massif A Model for Depositional History." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 171, no. 1-3 (September 26, 1985): 217–35. http://dx.doi.org/10.1127/njgpa/171/1985/217.

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Holm-Denoma, Christopher S., William A. Matthews, Linda K. Soar, Mark W. Longman, and James W. Hagadorn. "Provenance of Devonian–Carboniferous strata of Colorado: The influence of the Cambrian and the Proterozoic." Rocky Mountain Geology 57, no. 1 (June 1, 2022): 1–21. http://dx.doi.org/10.24872/rmgjournal.57.1.1.

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ABSTRACT We report new LA-ICP-MS U–Pb detrital zircon ages and sedimentary petrology of silty to sandy limestones and dolostones, as well as calcareous to dolomitic sandstones of the Devonian–Carboniferous (Mississippian) Chaffee Group. We also report new detrital zircon ages from the late Cambrian Sawatch Quartzite, and a U–Pb zircon crystallization age on a late Mesoproterozoic (1087.9 ± 13.5 Ma) granitoid of underlying basement from the Eagle Basin of northwest Colorado. Grain populations in the Chaffee Group are mostly bimodal. More than 84% of zircons centered around a Paleoproterozoic (c

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Demidenko, Yu E. "Microstructure of the Tubes of Cambrian Zooproblematics of the Family Hyolithellidae." Paleontological Journal 55, no. 5 (September 2021): 477–88. http://dx.doi.org/10.1134/s0031030121050038.

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Ling, Chenchen, Jin Peng, Hui Zhang, Yifan Wang, Yunbin Shao, Quanyi Sun, and Qiujun Wang. "Saetaspongia sponges from the Cambrian (Stage 4) Balang Formation of Guizhou, China." Journal of Paleontology 95, no. 5 (May 7, 2021): 944–56. http://dx.doi.org/10.1017/jpa.2021.29.

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AbstractSaetaspongia so far cannot be confidently assigned to any class-level crown group. Clarifying its phylogenetic position requires new information provided by more detailed studies of previously described and/or new material. Some sponge fossils with the typical skeletal architecture of Saetaspongia have recently been recognized in the Cambrian (Stage 4) Balang Biota of Guizhou, China, including S. jianhensis new species and S. cf. S. densa. The new taxon is characterized by the following features: spicules are fine monaxons and are inclined to be loosely to densely arranged into plumose

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Nyers, Andor J. "Thorslundella: a proposed early Cambrian protogastropod that secreted a phosphatic shell due to environmental constraints." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 174, no. 2 (May 26, 1987): 171–92. http://dx.doi.org/10.1127/njgpa/174/1987/171.

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Koneva, S. P., and G. T. Ushatinskaya. "New Upper Cambrian Lingulata (Brachiopoda) from the Agyrek mountains (northeastern central Kazakhstan)." Paleontological Journal 42, no. 2 (March 2008): 139–48. http://dx.doi.org/10.1134/s0031030108020044.

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Peel, John S., and Sebastian Willman. "Cavity-dwelling microorganisms from the Ediacaran and Cambrian of North Greenland (Laurentia)." Journal of Paleontology 96, no. 2 (October 22, 2021): 243–55. http://dx.doi.org/10.1017/jpa.2021.96.

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AbstractRecords of diagenetically mineralized, filamentous, cavity-dwelling microorganisms extend back to strata from the early Paleoproterozoic (2400 Ma). In North Greenland (Laurentia), they are first known from the Ediacaran (Neoproterozoic; ca. 600 Ma) Portfjeld Formation of southern Peary Land, in association with a biota similar to that of the Doushantuo Formation of China. The Portfjeld Formation cavity dwellers are compared with more widespread occurrences in Cambrian (Series 2, Stage 4, Miaolingian Series) strata from the same region in which assemblages in postmortal shelter structur

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Albanesi, Guillermo L., M. Eugenia Giuliano, Fernanda E. Pacheco, Gladys Ortega, and C. Ruben Monaldi. "Conodonts from the Cambrian-Ordovician Boundary in the Cordillera Oriental, NW Argentina." Stratigraphy 12, no. 3-4 (2016): 237–56. http://dx.doi.org/10.29041/strat.12.4.03.

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The Cambrian-Ordovician boundary in NW Argentinawas originally proposed for the lower upper section of the Cardonal Formation in the Amarilla Creek, Cajas Range, Cordillera Oriental of Jujuy, based on the first appearance of the conodont Cordylodus lindstromi. After the finding of the index fossil Iapetognathus, the intersystemic boundary in this stratigraphic unit was recently verified. Through the upper 42 meters of the Cardonal Formation, which is 160 m in total thickness, conodonts of the Cordylodus lindstromi, Iapetognathus and Cordylodus angulatus zones were recovered. The lower upper se

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Peel, John S., Christian B. Skovsted, and Elise Wallet. "Morphology and ecology of the bradoriid arthropods Spinospitella and Nikolarites from the Cambrian (Series 2, Stage 4) of North Greenland (Laurentia)." PalZ 95, no. 3 (June 23, 2021): 413–27. http://dx.doi.org/10.1007/s12542-021-00569-4.

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AbstractTuberculate fragments referred to Nikolarites spasskyi are compared with a complete carapace and other material of Spinospitella from Cambrian Series 2, Stage 4 in North Greenland. The descriptions expand earlier brief records from Laurentia of the two bradoriids, originally described from Siberia and Australia, respectively. The mutually exclusive occurrences of the two taxa indicate ecological control of their distribution in North Greenland. Robust fragments of Nikolarites spasskyi occur in reworked higher energy deposits of the Aftenstjernesø Formation, while thin-walled carapaces

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Wills, Matthew A. "Cambrian and Recent disparity: the picture from priapulids." Paleobiology 24, no. 2 (1998): 177–99. http://dx.doi.org/10.1666/0094-8373(1998)024[0177:cardtp]2.3.co;2.

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Abstract An understanding of several macroevolutionary trends has been greatly advanced in recent years by a focus on disparity (morphological variety) rather than taxic diversity. A seminal issue has been the nature of the Cambrian Radiation, and the question of whether problematical Cambrian fossils embody a range of anatomical design far exceeding that observed thereafter. Arthropods have hitherto furnished the only case study, revealing comparable levels of Cambrian and Recent disparity. The generality of this observation needs to be tested in other groups, and the priapulid worms provide

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Dai, Tao, Nigel C. Hughes, Xingliang Zhang, and Shanchi Peng. "Development of the early Cambrian oryctocephalid trilobite Oryctocarella duyunensis from western Hunan, China." Journal of Paleontology 95, no. 4 (March 17, 2021): 777–92. http://dx.doi.org/10.1017/jpa.2020.111.

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AbstractAbundant articulated specimens of the oryctocarine trilobite Oryctocarella duyunensis from the lower Cambrian (Stage 4, Series 2) Balang Formation at the Bulin section in western Hunan Province, South China, permit the description of all meraspid degrees. The maximum number of thoracic segments observed in this collection is 11. Meraspid growth was accompanied by progressive and gradual change in overall form, and this animal showed an homonymously segmented trunk with variation in the number of pygidial segments during ontogeny. Such variation permits a variety of plausible explanatio

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Liñan, Eladio, and Michal Mergl. "Lower and Middle Cambrian brachiopods from the Iberian Chains and Sierra Morena (Spain)." Spanish Journal of Palaeontology 16, no. 2 (September 21, 2021): 317. http://dx.doi.org/10.7203/sjp.16.2.21607.

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Parsley, R. L. "Evolution, Functional Morphology and Paedomorphism in the Gogiid-Ascocystitid Lineage (Eocrinoidea; Cambrian-Ordovician)." Paleontological Journal 55, no. 9 (December 2021): 966–76. http://dx.doi.org/10.1134/s0031030121090100.

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Handkamer, Neal M., Brian R. Pratt, and Robert B. MacNaughton. "Biostratigraphy and paleoecology of the trilobite faunas from the Mount Clark and Mount Cap formations (early and middle Cambrian), eastern Mackenzie Mountains, northwestern Canada." Journal of Paleontology 96, S89 (June 2022): 1–47. http://dx.doi.org/10.1017/jpa.2022.13.

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AbstractLower and middle Cambrian strata of the eastern Mackenzie Mountains, Northwest Territories, Canada, were deposited in a semi-enclosed basin along the eastern flank of the Mackenzie Arch. The Mount Clark Formation is predominantly composed of nearshore sandstone and is overlain by deeper water siltstone, mudstone, and carbonates of the Mount Cap Formation. The contact between these formations is interpreted as a flooding surface. Trilobite biostratigraphy indicates the presence of the traditional upper Olenellus through Glossopleura zones (Cambrian Series 2, Stage 4–Miaolingian, Wuliuan

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Repetski, J. E., M. E. Taylor, D. S. Collins, A. R. Palmer, G. D. Wood, and R. C. Tobin. "Integrating paleontology, geothermometry, and sedimentology in determining the history of the Reelfoot Basin, southern midcontinent, U.S.A." Paleontological Society Special Publications 6 (1992): 243. http://dx.doi.org/10.1017/s2475262200008030.

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The northeast-trending Reelfoot basin, extending from northeast Arkansas and westernmost Tennessee into southeastern Missouri, southernmost Illinois, and westernmost Kentucky, is geologically, and socioeconomically, significant because it is co-extensive with the New Madrid Seismic Zone, one of the most seismically active areas of the central and eastern United States. The basin has been periodically active from its inception as a rift basin in the Proterozoic to the present and has accumulated up to at least 5,000 m of sediment, including up to at least 1 km of Cretaceous and Tertiary sedimen

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Parcha, S. K. "Biostratigraphy of the Middle Cambrian sequences of Spiti Himalaya and its correlation with analogous sequences in Kashmir Himalaya." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 209, no. 2 (August 18, 1998): 231–46. http://dx.doi.org/10.1127/njgpa/209/1998/231.

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Mergl, M., G. Geyer, and A. El Attari. "The billingsellid genus Saccogonum (Brachiopoda) from the Moroccan Cambrian and its significance for the regional geology and stratigraphy." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 209, no. 3 (September 7, 1998): 273–93. http://dx.doi.org/10.1127/njgpa/209/1998/273.

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Novozhilova, N. V. "Early Cambrian Palaeoscolecidan Sclerites from the Western Limb of the Chekurovka Anticline (Siberian Platform)." Paleontological Journal 56, no. 2 (April 2022): 147–53. http://dx.doi.org/10.1134/s0031030122020095.

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Toniolo, Thiago F., Juliana M. Leme, Dermeval A. Carmo, Thomas R. Fairchild, Luana Morais, and Ricardo I. F. Trindade. "Artifacts resembling Ediacaran or Cambrian fossils: how to identify them and avoid their generation." Journal of Micropalaeontology 42, no. 2 (August 18, 2023): 83–93. http://dx.doi.org/10.5194/jm-42-83-2023.

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Abstract. The generation of artifacts during sample preparation must be considered in paleobiological studies, particularly during the Ediacaran and Cambrian, since such artifacts can assume forms similar to those of cloudinids and other problematic taxa commonly described in samples from these systems. Chemical reactions between hydrogen peroxide and sulfides from the samples can lead to the formation of tubular and vase-shaped structures. The visual description alone does not allow a conclusion about whether their origin is organic or inorganic. In these cases, chemical composition and ultra

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Braun, Andreas. "Prospective Lithologies, Techniques and Chances for Microscopic Paleontology at the Vendian/Cambrian Boundary." Gondwana Research 7, no. 3 (July 2004): 675–84. http://dx.doi.org/10.1016/s1342-937x(05)71055-8.

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Popov, Leonid E., Olga I. Nikitina, Tatiana E. Pirogova, and Gappar Kh Ergaliev. "Cambrian brachiopods from the area of the former Semipalatinsk nuclear-testing site, Chingiz Ranges, Kazakhstan." PalZ 95, no. 2 (February 10, 2021): 275–90. http://dx.doi.org/10.1007/s12542-020-00540-9.

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Zhang, Xingliang, and Degan Shu. "Current understanding on the Cambrian Explosion: questions and answers." PalZ, July 14, 2021. http://dx.doi.org/10.1007/s12542-021-00568-5.

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AbstractThe Cambrian Explosion by nature is a three-phased explosion of animal body plans alongside episodic biomineralization, pulsed change of generic diversity, body size variation, and progressive increase of ecosystem complexity. The Cambrian was a time of crown groups nested by numbers of stem groups with a high-rank taxonomy of Linnaean system (classes and above). Some stem groups temporarily succeeded while others were ephemeral and underrepresented by few taxa. The high number of stem groups in the early history of animals is a major reason for morphological gaps across phyla that we

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Liu, Fan, Timothy P. Topper, Luke C. Strotz, Yue Liang, Yazhou Hu, Christian B. Skovsted, and Zhifei Zhang. "Morphological disparity and evolutionary patterns of Cambrian hyoliths." Papers in Palaeontology 10, no. 2 (March 2024). http://dx.doi.org/10.1002/spp2.1554.

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AbstractHyolitha represent one of the major constituents of the Cambrian Evolutionary Fauna, first appearing in the Terreneuvian and rapidly diversifying soon after. Recent work has both enriched the hyolith fossil record and expanded our understanding of their biology, but studies documenting the evolutionary trajectory of Cambrian hyoliths remain scarce. Here we present the first study of changes in morphological disparity in Cambrian hyoliths over time with the aim of characterizing the evolutionary trajectory of hyoliths throughout their primary period of diversification. Our results show

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