Trombolitos (arrecifes microbiales) del morfogénero<i>Favosamaceria</i>en el Cámbrico Superior de la Precordillera Oriental, San Juan, Argentina

Raviolo, Mariana M.; Bordonaro, Osvaldo L.; Pratt, Brian R.

doi:10.5710/amgh.v47i3.8

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…Thrombolites are also microbial (e.g., Aitken 1967;Schmid 1996;Parcell 2002;Shapiro 2000;Riding 2011;Bosence et al 2015). The clotted nature of the thrombolitic mudstone is usually visible only thin section, and we find no diffuse vertical branching micro-or mesostructures such as those illustrated by Pratt and James (1982), Kennard and James (1986), Shapiro (2000), and Raviolo et al (2010;see also Riding 2000). One sample from a thrombolitic mudstone contains filamentous structures we interpret as microbial microborings (Fig.…”

Section: Carbonate Faciesmentioning

confidence: 49%

Petrography and Environmental Interpretation of Tufa Mounds and Carbonate Beds In the Jurassic Navajo Sandstone of Southeastern Utah, U.S.A.

Dorney

Parrish

Chan

et al. 2017

Journal of Sedimentary Research

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Carbonate deposits in the Jurassic Navajo Sandstone of Utah reflect deposition in interdune lakes and springs. Interdune-lake deposits consist of flat-lying carbonate units. Springs formed tufa mounds that are interpreted as subaerial, ambient-temperature, artesian-spring deposits. In the first systematic study of the petrography of the carbonate deposits in the Navajo Sandstone, eleven facies were identified in several flat-lying carbonate deposits and two tufa mounds. Fenestral mudstone and peloidal facies dominate the lacustrine deposits, whereas thrombolitic mudstone characterizes the mounds. The biota consists of ostracodes, charophytes, fish, mollusks, a possible freshwater sponge, trace fossils, and fragments of vascular plants. Features resulting from penecontemporaneous weathering provide evidence of episodic exposure of the lacustrine carbonate beds during deposition and formation of the tufa mounds under subaerial conditions. Although carbonate deposits are not rare in eolian systems, few have been studied in detail; comparisons between these and the Navajo Sandstone carbonate deposits reveal some characteristics that may be unique to the latter.

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Section: Carbonate Faciesmentioning

confidence: 49%

Petrography and Environmental Interpretation of Tufa Mounds and Carbonate Beds In the Jurassic Navajo Sandstone of Southeastern Utah, U.S.A.

Dorney

Parrish

Chan

et al. 2017

Journal of Sedimentary Research

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“…4e) noted upper Cambrian 'mazelike structures' in column interiors in Utah. Favosamaceria has also been described from Argentina (Raviolo et al, 2010), and similar fabrics have been described from various localities in North China (Lee et al, 2010(Lee et al, , 2016 where Chen et al (2014, p. 250) noted that "The deposition rate of inter-macerial sediment was most likely balanced with the growth rate of maceriae, sustaining a low synoptic relief". Point Peak Upper Biostrome maceriate fabric (Fig.…”

Section: Maceriate Fabricmentioning

confidence: 78%

“…In contrast, Raviolo et al . (2010) reported only clotted micrite and minor filamentous calcimicrobes from upper Cambrian Favosamaceria in the eastern Precordillera, Argentina. It remains to be seen how other examples of Favosamaceria ‐like forms developed.…”

Section: Discussionmentioning

confidence: 99%

“…14; Khanna et al ., 2020a; Lehrmann et al ., 2020). These distinctive and well‐preserved fabrics shed light on the origins of structures of similar age and appearance that are widely distributed around North America (Shapiro & Awramik, 2006, and references therein) and are also well‐known in Argentina (Armella, 1994; Raviolo et al ., 2010) and China (Lee et al ., 2010, 2014, 2016; Chen et al ., 2014).…”

Section: Discussionmentioning

confidence: 99%

“…It therefore appears that wellpreserved Favosamaceria-like forms may be constructed either by microstromatolite with minor calcimicrobes (as in our Point Peak examples) or by microstromatolite and keratolite (as in Chinese examples). In contrast, Raviolo et al (2010) reported only clotted micrite and minor filamentous calcimicrobes from upper Cambrian Favosamaceria in the eastern Precordillera, Argentina. It remains to be seen how other examples of Favosamaceria-like forms developed.…”

Section: Maceriate Fabricmentioning

confidence: 93%

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Stromatolite‐rimmed thrombolite columns and domes constructed by microstromatolites, calcimicrobes and sponges in late Cambrian biostromes, Texas, USA

Lee

Riding

2022

Sedimentology

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Microbial carbonates formed stromatolitic, thrombolitic, dendrolitic and maceriate (mazelike) fabrics in shallow marine Cambrian-Early Ordovician carbonates encircling Laurentia. However, poor preservation often hinders recognition of their specific components. Well-preserved examples of normal shallow marine limestones in the ca 490 Ma upper Cambrian Point Peak Member, Wilberns Formation, central Texas, include stromatolitic cones, steep-sided laminated rimmed columns with grainy interiors, and laminated and maceriate domes. Together these form decimetre to metre-thick biostromes. In these examples, a single component, microstromatolite, on its own or with minor calcimicrobes, creates macroscopic stromatolitic, dendrolitic, thrombolitic and maceriate fabrics. Microstromatolites constructed upward widening stromatolitic cones that developed into columns with laminated rims surrounding slightly depressed interiors. These columns accumulated allochthonous sediment by a 'bucket effect'. Their interiors contain either clusters of dendrolitic microstromatolite or ragged columns of laminated stromatolite-sponge biolithite, and are often characterized by a 'mottled' fabric that superficially resembles thrombolite. This mottling was formed by localized dolomitization around millimetric burrows that otherwise do not appear to have significantly influenced the biolithite fabric. Calcimicrobes, including cyanobacteria (Razumovskia) and microproblematica (Renalcis and Tarthinia), impart a mesoscopic clotted appearance to maceriate fabric, and locally to column rims, both of which are dominated by microstromatolite. Similar component-fabric relationships should be recognizable in rimmed columns and domes that were locally abundant elsewhere in Cambrian-Early Ordovician shallow carbonate seas.

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The middle–late Cambrian reef transition and related geological events: A review and new view

Lee

Chen

Chough

2015

Earth-Science Reviews

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Trombolitos (arrecifes microbiales) del morfogéneroFavosamaceriaen el Cámbrico Superior de la Precordillera Oriental, San Juan, Argentina

Cited by 7 publications

References 21 publications

Petrography and Environmental Interpretation of Tufa Mounds and Carbonate Beds In the Jurassic Navajo Sandstone of Southeastern Utah, U.S.A.

Petrography and Environmental Interpretation of Tufa Mounds and Carbonate Beds In the Jurassic Navajo Sandstone of Southeastern Utah, U.S.A.

Stromatolite‐rimmed thrombolite columns and domes constructed by microstromatolites, calcimicrobes and sponges in late Cambrian biostromes, Texas, USA

The middle–late Cambrian reef transition and related geological events: A review and new view

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