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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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Generalized stratigraphy of the middle Cambrian (<span class="search-highlight">Drumian</span>) Rockslide Formati...
Published: 18 August 2021
Fig. 2. Generalized stratigraphy of the middle Cambrian (Drumian) Rockslide Formation in the Ravens Throat River area, Northwest Territories. Gray-coloured intervals contain Burgess Shale-type soft-bodied fossils; coprolites are limited to the lower fossil bed. Modified from Kimmig and Pratt
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Specimens examined in this study, including original and new taxonomic inte...
Published: 24 July 2017
Table 1 Specimens examined in this study, including original and new taxonomic interpretations. Catalogue number Figure Locality Age Previous interpretation Reference New interpretation Fragment KUMIP 153093a/b 5.10, 5.11 Wheeler Formation Cambrian, Drumian Peytoia
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Occurrence of Ravens Throat River taxa in other western Laurentian Lagerstä...
Published: 01 January 2015
Table 1 Occurrence of Ravens Throat River taxa in other western Laurentian Lagerstätten: Pioche Formation (series 3, stage 5); Burgess Shale (series 3, stage 5); Marjum Formation (series 3, Drumian); Wheeler Formation (series 3, Drumian). √=represented, x
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: Geosphere
Published: 23 March 2023
Geosphere (2023) 19 (3): 719–747.
... the Grand Canyon and central Basin and Range, USA. This flat-topped carbonate platform deposit is the uppermost unit of the Tonto Group, replacing the informally named “undifferentiated dolomites.” The unit records two global chemostratigraphic events—the Drumian Carbon Isotope Excursion (DICE), when δ 13 C...
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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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Principal Component Analysis plot of the semilandmarked breaks (same as  Fi...
Published: 12 December 2017
examples (points without black dots), shows the positive assignment of new material to the ichnotaxon. Key: circles = Huérmeda Formation (Spain, Cambrian Stage 4); triangles with point upwards: Mansilla Formation (Spain, Cambrian Stage 5); diamonds: Murero Formation (Spain, Cambrian Drumian); triangles
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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Composite δ 13 C curve and global standard chronostratigraphic Cambrian sca...
Published: 01 July 2008
Figure 1. Composite δ 13 C curve and global standard chronostratigraphic Cambrian scale showing the isotopic shifts DICE (Drumian carbon isotope excursion) and SPICE (Steptoean positive isotopic carbon excursion) discussed in the text (modified from Zhu et al., 2006 ). BACE—Basal Cambrian Carbon
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Box plots of geographic occupancy of species for 10 Cambrian stages. Dru, D...
Published: 01 May 2023
Figure 6. Box plots of geographic occupancy of species for 10 Cambrian stages. Dru, Drumian; For, Fortunian; Guz, Guzhangian; Jia, Jiangshanian; Pai, Paibian; Wul, Wuliuan; St2, Stage 2; St3, Stage 3; St4, Stage 4; St10, Stage 10.
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By-cell biogeographic turnover and by-bioregion turnover (emergence and dis...
Published: 01 May 2023
Figure 2. By-cell biogeographic turnover and by-bioregion turnover (emergence and disintegration) throughout the Cambrian. The estimates are the averages of 400 random grid rotations. Dru, Drumian; For, Fortunian; Guz, Guzhangian; Jia, Jiangshanian; Pai, Paibian; Wul, Wuliuan; St2, Stage 2; St3
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Global species diversity of marine invertebrates through the Cambrian based...
Published: 01 May 2023
Figure 5. Global species diversity of marine invertebrates through the Cambrian based on shareholder quorum subsampling with 60% frequency coverage per stage. Error bar is standard deviation of 100 trials. Dru, Drumian; For, Fortunian; Guz, Guzhangian; Jia, Jiangshanian; Pai, Paibian; Wul
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Stratigraphic and geographical occurrences of acritarch assemblages from ca...
Published: 07 April 2021
Figure 13. Stratigraphic and geographical occurrences of acritarch assemblages from carbonaceous shales in the Cambrian (data from Baltica and Poland modified from Moczydłowska, 1991 , 1998 ; data from Tarim, Yangtze, and Lesser Himalaya from Yao et al., 2005 ). Guzh.—Guzhangian; Drum.—Drumian
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Trajectory of sample-standardized diversity of actively mobile occurrences ...
Published: 01 May 2023
Figure 7. Trajectory of sample-standardized diversity of actively mobile occurrences in the Cambrian based on shareholder quorum subsampling with 60% frequency coverage per stage. Error bar is standard deviation of 100 trials. Dru, Drumian; For, Fortunian; Guz, Guzhangian; Jia, Jiangshanian; Pai
Journal Article
Journal: GSA Bulletin
Published: 12 May 2023
GSA Bulletin (2024) 136 (1-2): 810–828.
..., spanning the Drumian to lower Jiangshanian. Redox data indicate locally/regionally well-oxygenated conditions throughout the SPICE event in both study sections except for low-oxygen (hypoxic) conditions within the rising limb of the SPICE (early-middle Paibian) at Duibian. As in coeval sections globally...
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Journal Article
Published: 30 August 2022
Canadian Journal of Earth Sciences (2023) 60 (2): 133–171.
..., volcanism, debris flows, and bentonite deposition on a cryptic unconformity in SE Newfoundland. The early Middle Cambrian age of the Ads 7–8 boundary is obscured by referring the lower Manuels River Formation and Cristallinium cambriense Zone to the younger Drumian Stage. Ads 8 has thin ashes in coterminous...
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