Reef Patterns and Environmental Influences in the Cambrian and Earliest Ordovician

Rowland, Stephen; Shapiro, Russell S.

doi:10.2110/pec.02.72.0095

Cited by 95 publications

(122 citation statements)

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“…Evidence for the presence of photosymbionts is necessarily indirect: the so-called thintissue syndrome and the lack of correlation between archaeocyathan abundance and high nutrient supply, as indicated, for example, by phosphate-enriched strata (coWen, 1988;roWlAnD & gAngloFF, 1988;TAlenT, 1988;roWlAnD & shAPiro, 2002;cf. WooD, ZhurAvlev, & Debrenne, 1992;WooD, 1995WooD, , 1999.…”

Section: Symbiontsmentioning

confidence: 99%

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: Symbiontsmentioning

confidence: 99%

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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“…Those studies have begun to fill in the well-known gap in metazoan reef records after the demise of archaeocyaths in the late early Cambrian (Pratt et al, 2001;Webby, 2002;Rowland and Shapiro, 2002).…”

Section: Paleogeographic Distribution Of Amsassia and Its Role In Thementioning

confidence: 99%

“…Some of these reefs are mainly microbial, but demosponges helped as secondary reef builders (Cañas and Carrera, 1993;Riding and Zhuravlev, 1995;Shapiro and Rigby, 2004;Kruse and Zhuravlev, 2008;Wang et al, 2012;Choh et al, 2013;Kruse and Reitner, 2014) (mainly summarized in Rowland and Shapiro, 2002;Hong et al, 2012;Adachi et al, 2015).…”

Section: Paleogeographic Distribution Of Amsassia and Its Role In Thementioning

confidence: 99%

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A lowermost Ordovician tabulate-like coralomorph from the Precordillera of western Argentina: a main component of a reef-framework consortium

Carrera¹,

Astini²,

Gómez³

2016

J. Paleontol.

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Abstract.-Although putative corals of uncertain affinities occur in the early Cambrian, the earliest definite tabulate corals have not been described prior to the Early Ordovician in North America. This paper reports a new finding of a tabulate-like coralomorph forming part of biostratigraphically well-constrained reef mounds in the latest Cambrian-Early Ordovician La Silla Formation in the Argentine Precordillera. The oldest record of the coralomorph genus Amsassia is reported and a new species, A. argentina, is erected. The discovery of this genus in the lowermost Ordovician modifies the previously proposed paleogeographic distribution and patterns of origination and migration routes of this coral-like organism. Amsassia argentina n. sp. constitutes a main framework builder together with a complex microbial consortium. This oldest occurrence of Amsassia as a reef builder represents a new record of a skeletal organism in the gap of metazoan reef constructors after the demise of archaeocyaths in the late early Cambrian.

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“…고배류는 캄브리아기 초기 말엽의 멸종 사건으로 크게 타격을 입었고 이후 다시는 생물 초를 만들지 못하였으며 (Rowland and Shapiro, 2002), 이와 함께 석회화된 미생물의 다양성도 크게 감소하였다 (Zhuravlev, 1996;Riding, 2001;Lee et al, 2014b). 이후 캄브리아기 중-후기(Series 3-Furongian)에는 주로 미생물들이 생물초를 형성한 것 으로 알려져 왔으나 (Rowland and Shapiro, 2002), 최근 이 시기의 미생물초에 상당량의 해면동물이 포 함되어 있음이 밝혀지며 이들을 해면동물-미생물초로 재해석할 가능성이 제기되었다 (Hong et al, 2012;Kruse and Reitner, 2014;Lee et al, 2014aLee et al, , 2015c (Adachi et al, 2011;Hong et al, 2015). 오르도비스기 중기에서 후기에는 후생동물들 이 미생물의 도움 없이도 생물초를 만들게 됨에 따라 미생물암의 비중이 급격하게 감소하였다 (Webby, 2002).…”

Section: 지질시대에서 나타나는 미생물암unclassified

A Review on Microbialites: a Korean Perspective

Lee¹

2015

The Journal of the Petrological Society of Korea

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Microbialites are defined as rocks formed by microbial organisms. After their first appearance around 3.5 billion years ago, microbialites occur in various depositional environments throughout geological periods. Microbial organisms form microbialites by trapping and binding detrital sediments and/ or precipitating carbonate cements, resulting in formation of various microstructures and mesostructures. Four major types of microbialites are distinguished based on their mesostructures: stromatolite, thrombolite, dendrolite, and leiolite. In the geological records, occurrences of microbialites are influenced by calcium carbonate saturation of seawater and interaction of microbialites with metazoans. Stromatolites mainly flourished during the Precambrian, and diminished as level of atmospheric carbon dioxide declined. On the other hand, thrombolites, mainly formed by calcified microbes, began to flourish from the Neoproterozoic. As metazoans diversified in the Phanerozoic, proportion of the microbialites within sedimentary record declined. Since then, microbialites only occasionally flourished during the Phanerozoic, such as shortly after mass-extinction events. In the Korean Peninsula, microbialites occur in the Neoproterozoic Sangwon System, the Early Paleozoic Joseon Supergroup, and the Cretaceous Gyeongsang Supergroup, which form different shapes according to their age and depositional environments. By performing detailed studies on these Korean microbialites, it is possible to understand how microbes affected geological records and sedimentary environments, as well as their interaction with other organisms.

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Reef Patterns and Environmental Influences in the Cambrian and Earliest Ordovician

Cited by 95 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

A lowermost Ordovician tabulate-like coralomorph from the Precordillera of western Argentina: a main component of a reef-framework consortium

A Review on Microbialites: a Korean Perspective

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