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Drumian

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Journal Article
Published: 01 May 2018
Journal of Paleontology (2018) 92 (S76): 1–44.
.... The 100 m thick lower limestone and siltstone member of the Emigrant Formation at Clayton Ridge ranges in age from the Bolbolenellus euryparia / Nephrolenellus multinodus Zone (Laurentian Dyeran Stage) to the Cedaria brevifrons Zone (Laurentian Marjuman Stage; Drumian Stage; this study). The 40 trilobites...
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Journal Article
Journal: PALAIOS
Published: 12 December 2017
PALAIOS (2017) 32 (12): 750–761.
... (Huérmeda Formation, Cambrian Series 2, Stage 4), or 23 complete Eccaparadoxides pradoanus thoraces from Mesones de Isuela (Murero Formation, Cambrian Series 3, Drumian). Ten injuries on 69 E. pradoanus thoraces from Purujosa (Murero Formation, Cambrian Series 3, Drumian) were noted. There is no evidence...
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Journal Article
Published: 20 January 2017
Canadian Journal of Earth Sciences (2017) 54 (2): 113–128.
... Formation of western Newfoundland record a succession of at least seven species that spans most of the Drumian and all of the Guzhangian stages, and demonstrate that the genus has considerable, previously unrecognized biostratigraphic potential. Older, Drumian species, including the type species, H...
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Journal Article
Published: 01 January 2015
Journal of Paleontology (2015) 89 (1): 51–71.
...Julien Kimmig; Brian R. Pratt Abstract A new Burgess Shale-type Lagerstätte is described from the middle Cambrian (Series 3, Drumian) Rockslide Formation of the Mackenzie Mountains, Northwest Territories, Canada. The Rockslide Formation is a unit of deeper water ramp to slope, mixed carbonate...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2008
GSA Bulletin (2008) 120 (7-8): 962–975.
...J. Javier Álvaro; Blanca Bauluz; Ignacio Subías; Catherine Pierre; Daniel Vizcaïno Abstract The Cambrian Drumian Carbon Isotope Excursion (DICE) and the Steptoean Positive Carbon Isotope Excursion (SPICE) have been so far reported in subtropical platforms: the DICE event is a large negative...
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Journal Article
Journal: PALAIOS
Published: 01 September 2017
PALAIOS (2017) 32 (9): 559–571.
...YOICHI EZAKI; JIANBO LIU; NATSUKO ADACHI; ZHEN YAN Abstract: Coralomorph-lithistid demosponge-microbial reefs are developed in deep subtidal settings of the lower part of the Zhangxia Formation ( Crepicephalina Zone: Drumian of Cambrian Series 3) in the Jiulongshan section of the Laiwu area...
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Journal Article
Published: 05 March 2015
Geological Magazine (2015) 152 (5): 923–934.
..., favouring oxygenated waters, as suggested by their anatomy, lithofacies distribution, faunal associates and provinciality. Most bradoriids were extinct by the end of the Drumian Age (middle of Cambrian Epoch 3). The post-Drumian is characterized by widespread dysoxic shelf lithofacies in southern Britain...
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Journal Article
Journal: Geology
Published: 06 June 2019
Geology (2019) 47 (8): 734–738.
...M. Dunk; R.A. Strachan; K.A. Cutts; S. Lasalle; C.D. Storey; I.M. Burns; M.J. Whitehouse; M. Fowler; H. Moreira; J. Dunlop; I. Pereira Abstract Uranium-lead (U-Pb) zircon dating establishes a late Cambrian (Drumian) protolith age of 503 ± 2 Ma for a trondhjemitic gneiss of the calc-alkaline Strathy...
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Journal Article
Journal: Geology
Published: 18 January 2019
Geology (2019) 47 (3): 231–234.
..., which favored preservation of soft tissues by hindering decay. Although invisible on fresh and weathered surfaces, laminated claystone comprising the middle Cambrian (Drumian) Ravens Throat River Lagerstätte in the Rockslide Formation of the Mackenzie Mountains, northwestern Canada, is revealed...
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Journal Article
Journal: PALAIOS
Published: 03 April 2018
PALAIOS (2018) 33 (4): 125–140.
...JULIEN KIMMIG; BRIAN R. PRATT ABSTRACT The Rockslide Formation (middle Cambrian, Drumian, Bolaspidella Zone) of the Mackenzie Mountains, northwestern Canada, hosts the Ravens Throat River Lagerstätte, which consists of two, 1-m thick intervals of greenish, thinly laminated, locally burrowed...
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Journal Article
Published: 29 June 2017
Geological Magazine (2018) 155 (1): 181–186.
...RUDY LEROSEY-AUBRIL; JACOB SKABELUND Abstract The Drumian Wheeler Formation preserves one of the most diverse exceptionally preserved faunas of the Cambrian period. Here we describe Messorocaris magna gen. et sp. nov., a new non-biomineralizing arthropod from this formation tentatively assigned...
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Journal Article
Published: 23 March 2017
Journal of Paleontology (2017) 91 (4): 672–684.
...Elise Nardin; Bertrand Lefebvre; Oldřich Fatka; Martina Nohejlová; Libor Kašička; Miroslav Šinágl; Michal Szabad Abstract The primitive blastozoan Felbabkacystis luckae n. gen. n. sp. is described from the Drumian Jince Formation, Barrandian area (Czech Republic) from eleven fairly well-preserved...
Journal Article
Published: 11 September 2015
Journal of Paleontology (2015) 89 (3): 377–384.
... tubercle. Recognition of P . atavus , for the first time in Korea, allows the determination of the base of the Drumian Stage in Korea and aids correlation with other parts of the world. Family Ptychagnostidae Kobayashi, 1939 1880 Agnostus atavus Tullberg, p. 14, pl. 1, figs. 1a–1d. 1880...
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Journal Article
Published: 20 May 2015
Geological Magazine (2015) 152 (6): 1085–1103.
... the Drumian to Jiangshanian stages of the Cambrian Period, respectively the regional Ptychagnostus atavus to Ivshinagnostus ivshini-Irvingella major trilobite zones. δ 13 C carb data include the Steptoean positive carbon isotope excursion (SPICE) with a local peak value of +5‰. The onset of SPICE corresponds...
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Journal Article
Published: 01 January 2015
Journal of Paleontology (2015) 89 (1): 96–102.
.... The narrow lobe is the result of the medial fusion of anterior and posterior lobes, seemingly a recurrent theme in hipponicharionid evolution. The type species, F . groenlandica n. sp., is described from the Ekspedition Brae Formation (Drumian Stage) of Peary Land but the description of two unnamed species...
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Series: Geological Society, London, Memoirs
Published: 01 January 2014
DOI: 10.1144/M42.2
EISBN: 9781862397026
... Velvet (revised) and Treffgarne Bridge formations. The Porth-y-rhaw Group spans the Tomagnostus fissus Biozone (C3, Drumian) to the Olenus cataractes Biosubzone (Furongian, Paibian). The overall two-fold subdivision of the Cambrian part of the Dyfed Supergroup in the area accords broadly...
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Series: Geological Society, London, Memoirs
Published: 01 January 2014
DOI: 10.1144/M42.3
EISBN: 9781862397026
... System then the Welsh Borderlands Fault System, both of which are terrane boundaries, were responsible for the dominantly coarse-grained arenaceous sedimentation of pre-Drumian times. In the Welsh Basin, this is highlighted by a change in sediment source from the Monian Superterrane to the Wrekin Terrane...
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Journal Article
Published: 08 May 2013
Canadian Journal of Earth Sciences (2013) 50 (5): 503–518.
... Island, Fortune Bay. A stratigraphical position within the Cambrian punctuosus Zone in the upper part of the Drumian Stage is indicated. The presence of the oculate eodiscid Pagetide s in late mid-Cambrian rocks, within the Avalon Tectonostratigraphical Zone, is highlighted, because the genus...
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... of the Upper Cambrian Millardan Series and the Cambrian-Ordovician Ibexian Series. Stratigra-phers established a Global boundary Stratotype Section and Point (GSSP) for the base of the Middle Cambrian Drumian Stage in the Drum Mountains and proposed another GSSP for the base of the uppermost Cambrian stage...
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Journal Article
Published: 22 December 2011
Canadian Journal of Earth Sciences (2012) 49 (1): 289–307.
... indicates that the upper part of the formation belongs to the hicksi Zone of the Drumian Stage. Acritarchs from the MacMullin Formation provide the first biostratigraphic evidence that this unit extends into the forchhammeri Zone of the Guzhangian Stage. These acritarchs are present in the lower part...
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