Primordial Metazoan-Calcimicrobial Reefs: Tommotian (Early Cambrian) of the Siberian Platform

Kruse, Peter D.; Zhuravlev, Andrey Yu.; James, Noël P.

doi:10.2307/3515157

Cited by 104 publications

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“…A similar behavior has been observed in the deepest bioherms of the Tommotian stage of the Siberian Platform (Kruse, ZhurAvlev, & JAmes, 1995), but in archaeocyathide archaeocyaths (Dictyo cyathus bornemAnn) only.…”

Section: Bathymetrymentioning

confidence: 48%

“…The bioconstr uctional capacity of archaeocyaths has been documented in many recent works, representing all regions and spanning their appearance in the Tommotian to their virtual demise in the Toyonian (ZhurAvlevA, 1960b(ZhurAvlevA, , p. 59, 1966(ZhurAvlevA, , 1972aJAmes & KobluK, 1978;JAmes & KlAPPA, 1983;gAnDin & Debrenne, 1984roWlAnD, 1984;roWlAnD & gAngloFF, 1988;Debrenne, gAnDin, & roWlAnD, 1989;JAmes, KobluK, & KlAPPA, 1989;rees, PrATT, & roWell, 1989;JAmes & grAvesTocK, 1990;Debrenne, gAnDin, & ZhurAvlev, 1991;KennArD, 1991;Kruse, 1991b;WooD, ZhurAvlev, & chimeD Tseren, 1993;Kruse, ZhurAvlev, & JAmes, 1995;riDing & ZhurAvlev, 1995;Kruse & others, 1996;ZhurAvlev, , 2001cWooD, 1999;coPPer, 2001;PrATT & others, 2001;roWlAnD & shAPiro, 2002;Kiessling, Flügel, & golonKA, 2003). The resultant bioconstructions (meterscale mounds) all had the same basic plan and can be categorized into component domains occupied by associations of lime mud, archaeocyaths, renalcid calcimicrobes, and/or cement.…”

Section: Bioconstructionmentioning

confidence: 99%

“…Many archaeocyaths did possess a large skeletal surface area mantled by a thin veneer of soft matter amenable to photosymbionts. However, such forms tended to be mud dwellers favoring turbid waters, presumably inimical to photosymbionts (ZhurAvlevA, 1972a;Kruse, ZhurAvlev, & JAmes, 1995;ZhurAvlev, 2001c). Similarly, the plot of archaeocyathan generic diversity through time matches that of phosphaticshelled genera (lingulates+tommotiids+mob-ergellans+protoconodonts), suggesting that there is indeed a positive correlation between archaeocyathan diversity and phosphate input (ZhurAvlev, 2001b).…”

Section: Symbiontsmentioning

confidence: 99%

“…Reefs were presumably initiated during episodes when mud input slowed or ceased, allowing localized cementation or stabilization of seafloor mud (Kruse, ZhurAvlev, & JAmes, 1995;riDing & ZhurAvlev, 1995;roWlAnD & shAPiro, 2002). The large monospecific domains that formed the bulk of many biohermal communities suggest that archaeocyathan larvae were of viviparous origin, as they apparently did not travel far after release.…”

mentioning

confidence: 99%

“…Treatise Online, number 38 1983;Kruse, ZhurAvlev, & JAmes, 1995;ZhurAvlev & WooD, 1995). Among the archaeocyaths, Ajacicyathida were highly competitive, and their incompatibility often involved spatial separation between adjacent cups, preventing them from becoming good binders (Debrenne & ZhurAvlev, 1992b, p. 164;WooD, ZhurAvlev & Debrenne, 1992).…”

mentioning

confidence: 99%

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Treatise Online, no. 38: Part E, Revised, Volume 4, Chapter 18: General features of the Archaeocyatha

Debrenne¹,

Zhuravlev²,

Kruse³

2012

TREON

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Section: Bathymetrymentioning

confidence: 48%

Section: Bioconstructionmentioning

confidence: 99%

Section: Symbiontsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Treatise Online, no. 38: Part E, Revised, Volume 4, Chapter 18: General features of the Archaeocyatha

Debrenne¹,

Zhuravlev²,

Kruse³

2012

TREON

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The record of sea water chemistry evolution during the Ediacaran–Cambrian from early marine cements

Xiong

Wood

Pichevin

2022

The Depositional Record

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The Ediacaran-Cambrian Radiation marks the widespread appearance of metazoans and calcareous biomineralised hard parts. These innovations occurred during an interval of dynamic changes in marine redox and sea water chemistry. Here, changing carbonate mineralogy, Mg/Ca ratios and rare earth element concentrations including the relative abundance of cerium (Ce anomaly: Ce anom ) are documented to track sea water oxygen levels, in well-preserved early marine cements from shallow marine reefs from Cambrian Stages 2-4 (ca 525-512 Ma). First, integrating the mineralogical data with published records, several shifts in dominant carbonate mineralogy are inferred: 'dolomite-aragonite seas' in the late Ediacaran; 'aragonite/high-Mg calcite seas' in Cambrian Stage 2; a temporary shift to a 'calcite sea' during early Cambrian Stage 3; an 'aragonite sea' between late Cambrian Stage 3 and late Cambrian Stage 4, then a gradual shift from mixed 'aragonite-calcite seas' during the middle and upper Cambrian towards a 'calcite sea' by the early Ordovician. Second, based on measured mMg/ Ca in early marine cements, calculated sea water mMg/Ca at 15 and 35°C ranges from 1.2 to 0.8 in Cambrian Stage 2, 0.7-0.4 in Stage 3 and 1.4-0.9 in Stage 4 respectively. Finally, analysed Ce anom data combined with existing Ce anom data suggest potentially three phases of global oxic expansion. First, a long-lived phase of progressive oxygenation during the late Ediacaran to Fortunian (ca 550-540 Ma; average Ce anom from 0.99 to 0.41), and possibly two shorter phases during early Cambrian Stage 3 (ca 519 Ma; average Ce anom from 0.91 to 0.40) and Stage 4 (ca 512 Ma; average Ce anom from 1.02 to 0.49), bounded by intervals of more dominant anoxia. Summarising, these data demonstrate that early marine cements offer an underused and high-resolution archive of shallow marine redox and sea water chemistry through this critical transition in Earth's evolution.

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Morphological disparity and evolutionary patterns of Cambrian hyoliths

Liu,

Topper,

Strotz

et al. 2024

Papers in Palaeontology

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Hyolitha 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 that hyoliths occupied distinct regions of morphospace at different times during the Cambrian, with an expansion in morphospace occupation associated with the increase in hyolith diversity in the early Cambrian. Both the Sinsk Event and multiple abiotic factors led to a decline in hyolith diversity in the Miaolingian, and morphological disparity also contracts in association with this reduction in diversity.

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Primordial Metazoan-Calcimicrobial Reefs: Tommotian (Early Cambrian) of the Siberian Platform

Cited by 104 publications

References 0 publications

Treatise Online, no. 38: Part E, Revised, Volume 4, Chapter 18: General features of the Archaeocyatha

Treatise Online, no. 38: Part E, Revised, Volume 4, Chapter 18: General features of the Archaeocyatha

The record of sea water chemistry evolution during the Ediacaran–Cambrian from early marine cements

Morphological disparity and evolutionary patterns of Cambrian hyoliths

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