Agglutinated or Porcelaneous Tests: Where to Draw the Line?

Rigaud, Sylvain; Martini, Rossana

doi:10.2113/gsjfr.46.3.333

Cited by 15 publications

(4 citation statements)

References 57 publications

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“…The most eye-catching difference between the lagoonal facies at Lime Peak and other coeval lagoonal deposits [26,34,132,190] is the marked underrepresentation of the genus Aulotortus. Assemblages from Lime Peak are extremely similar to the ones described from the Norian lagoonal deposits of the Black Marble Quarry in Oregon [30,31,[35][36][37][38][39][40]174] except for the lower amount of Trocholinidae. In particular, among the numerous taxa shared by the two sites, we can cite the genus Falsoreinholdella and species such as Trochosiphonia stanleyi, Praereinholdella galei, Parvalamella ashbaughi, Tubulastella comans or Parvalamella nolfi.…”

Section: Organisms' Distribution Within the Lime Peak Carbonate Systemsupporting

confidence: 52%

“…With the objective of closing this knowledge gap, the REEFCaDe (REEF and Carbonate Development) scientific project was launched at the University of Geneva fourteen years ago. Over this timeframe, various Upper Triassic Panthalassan localities were investigated in the Russian Far East [17,21], Japan [18,[22][23][24][25][26][27][28][29][30], the United States [30][31][32][33][34][35][36][37][38][39][40][41], Mexico [42][43][44] and Canada [45][46][47]. Several aspects of the taxonomy, paleoecology, stratigraphy and distribution of diverse organisms in Panthalassa, including foraminifera (e.g., [26,30,[35][36][37][38][39][40]46]), calcareous algae [48], ostracods [47], halobiid bivalves [41,45] and reef biota [22], have been clarified in the framework of this long-term effort.…”

Section: Introductionmentioning

confidence: 99%

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Upper Triassic Carbonate Records: Insights from the Most Complete Panthalassan Platform (Lime Peak, Yukon, Canada)

et al. 2022

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Upper Triassic carbonate platforms from the Panthalassa Ocean remain less-understood and less-studied than their Tethyan equivalents. This imbalance is largely due to the poorer preservation state of Panthalassan carbonate rock successions in terms of rock quality and depositional geometries, which prevents good appreciation of depositional systems. In this context, carbonate exposures from Lime Peak (Yukon, Canada) represent an outstanding exception. There, the remains of an Upper Norian Panthalassan carbonate platform are well-exposed, show remarkably preserved depositional geometries and overall superior rock preservation. In this work, we analyse the carbonates from the Lime Peak area with particular attention to the vertical and lateral distribution of biotic assemblages and microfacies at the platform scale. Results demonstrate that the Lime Peak platform was surrounded by a basin with an aphotic sea bottom. The carbonate complex developed in warm waters characterized by high carbonate saturation. The area was also defined by moderate to high nutrient levels: this influenced the type of carbonate factory by favouring microbialites and sponges over corals. During its growth, Lime Peak was influenced by tectono-eustatism, which controlled the accommodation space at the platform top, primarily impacting the internal platform environments and the stability of the slope. Gaining better knowledge of the spatial distribution and dynamics of Upper Triassic organisms and sedimentary facies of Panthalassa in relation to tectono-eustatism lays the first foundations for reconstructing more robust platform models and understanding the evolution of other, more dismantled Upper Triassic Panthalassan carbonate systems through time.

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Section: Organisms' Distribution Within the Lime Peak Carbonate Systemsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Upper Triassic Carbonate Records: Insights from the Most Complete Panthalassan Platform (Lime Peak, Yukon, Canada)

et al. 2022

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“…Such specimens typically display micrometer-sized neomorphic calcite/overgrowths on test surfaces and within their interiors 8 – 10 , 15 . Notably, observations of such micrometer-sized particles within microgranular textures have led to discussions as to whether they were secreted or agglutinated 7 , 10 , 13 , 16 – 18 .…”

Section: Introductionmentioning

confidence: 99%

Unlocking the biomineralization style and affinity of Paleozoic fusulinid foraminifera

Dubicka

Gorzelak

2017

Sci Rep

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Fusulinids are the most diverse, abundant and geographically widespread Paleozoic foraminifera which are widely considered to possess a “homogeneously microgranular” test microstructure composed of subangular grains of several micrometers in size. However, this texture appears to be a diagenetic artifact. Here we describe well-preserved Devonian calcareous fusulinids (Nanicella) from the Holy Cross Mountains (HCM) in central Poland. Foraminifera from Poland in which the primary nature of tests have not been masked by diagenesis are composed of low magnesium calcite spherical grains up to about 100 nanometers in diameter, identical to those observed in Recent and fossil hyaline foraminifera (Rotaliida, Globothalamea). These data call the paradigm of microgranular test microstructure of Foraminifera into question, and suggest a possible phylogenetic relationship between globothalamids and some fusulinids.

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“…As documented by multiple studies conducted over the past 15 years, the Triassic Panthalassa met all the environmental conditions for the development of numerous shallow‐water carbonate systems (Chablais, Martini, & Onoue, 2010; Chablais, Martini, Samankassou, et al, 2010; Chablais, Onoue, & Martini, 2010; Chablais et al, 2011; Del Piero, Rigaud, Peybernes, et al, 2022; Fucelli et al, 2021; Heerwagen & Martini, 2020; Khalil et al, 2018; Martindale et al, 2015; Onoue et al, 2009; Peybernes et al, 2015; Peybernes, Chablais, Onoue, Escarguel, & Martini, 2016; Peybernes, Chablais, Onoue, & Martini, 2016; Peybernes et al, 2020; Peyrotty, Rigaud, et al, 2020; Peyrotty, Brigaud, & Martini, 2020; Peyrotty, Ueda, et al, 2020; Rigaud et al, 2010, 2012, 2016; Rigaud, Vachard, & Martini, 2015; Rigaud, Martini, & Rettori, 2013; Rigaud, Blau, et al, 2013; Rigaud, Martini, & Vachard, 2015; Rigaud & Martini, 2016; Sano et al, 2012; Senowbari‐Daryan et al, 2010; Zonneveld et al, 2007). The remnants of those systems occur today in the Circum‐Pacific area, either in accretionary complexes (i.e., Philippines, Japan, Russian Far East) or on accreted terranes (USA, Canada, Mexico) (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Sedimentology and biostratigraphy of the upper Triassic carbonates from the Shiriya cape, North Kitakami Belt, Japan

et al. 2022

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Relics of the Panthalassa Ocean occur today in accretionary complexes and terranes on the entire Circum‐Pacific region. Among them, remains of shallow‐water carbonate systems provide valuable information about the ecology and environmental conditions that prevailed in this immense ocean. In this regard, the Shiriya Cape of the North Kitakami Belt (Aomori Prefecture, Honshu Island, Japan) is an essential place to study. Characterized by the presence of numerous limestone deposits embedded in typical accretionary mélange, including pluri‐kilometric massive slabs and metric bedded deposits, the cape is indeed a key vestige of carbonate deposition in the Panthalassa. All the limestone outcrop form the Shiriya Cape were sampled and studied in detail for the first time. Despite a general poor preservation, macroscopic sedimentary features such as burrows and large megalodontids patches as well as four microfacies were identified and are presented in detail in this work. On the basis of foraminifers and conodonts biostratigraphy, the age of the limestone deposits is defined as Norian. Similarities with analogous and synchronous systems from Panthalassan and Tethyan realms are extensively discussed. The closest analog to the Shiriya limestone appears to be the Panthalassan Dalnegorsk limestone (Russian Far East), both regarding microfacies and depositional setting. Sedimentary successions similar to Lofer‐cycles, well known in Tethyan synchronous systems, were also discovered in the Shiriya Cape. Along with the large limestone slabs, countless limestone‐bearing conglomerates also crop out on the Shiriya Cape. Their study and comparison with similar deposits in Japan highlighted their importance in the understanding of the dismantling of mid‐oceanic carbonates. The observations and comparison with well‐known carbonate systems permitted to establish a hypothetical depositional model of the Shiriya limestone corresponding to a Norian isolated carbonate system developed on an immerged volcanic seamount.

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Agglutinated or Porcelaneous Tests: Where to Draw the Line?

Cited by 15 publications

References 57 publications

Upper Triassic Carbonate Records: Insights from the Most Complete Panthalassan Platform (Lime Peak, Yukon, Canada)

Upper Triassic Carbonate Records: Insights from the Most Complete Panthalassan Platform (Lime Peak, Yukon, Canada)

Unlocking the biomineralization style and affinity of Paleozoic fusulinid foraminifera

Sedimentology and biostratigraphy of the upper Triassic carbonates from the Shiriya cape, North Kitakami Belt, Japan

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