Stromatoporoidea from the Ordovician rocks of central and eastern Canada

Bolton, T E

doi:10.4095/126972

Cited by 9 publications

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“…Even though laminar to domical forms are common among Late Ordovician clathrodictyids, they exhibit much more variability in growth form than Middle to Late Ordovician labechiids (Bolton, ; Kano & Fujishiro, ; Lin & Webby, ; Webby, ; Webby & Banks, ; Webby & Morris, ). The growth forms of Ordovician clathrodictyids have been attributed to intrinsic characteristics of the organism, suggesting that the differences in growth form were controlled by genetic factors (Kano & Fujishiro, ).…”

Section: Discussionmentioning

confidence: 99%

Late Ordovician stromatoporoids from the Xiazhen Formation of South China: Paleoecological and paleogeographical implications

et al. 2018

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The Upper Ordovician Xiazhen Formation, which crops out in Zhuzhai, near the Jiangshan-Changshan-Yushan region of southeast China, consists of a variety of carbonate-siliciclastic lithofacies representing a shallow-water platform environment. A total of eleven stromatoporoid genera in two orders, comprising three clathrodictyid genera (Clathrodictyon, Ecclimadictyon, and Labyrinthodictyon) and eight labechiid genera (Cystostroma, Rosenella, Pseudostylodictyon, Aulacera, Stylostroma, Pachystylostroma, Labechia, and Labechiella), are recognized from 18 stratigraphic units representing a wide range of depositional environments in the formation. Clathrodictyon is the most abundant stromatoporoid genus, occupying a long stratigraphic range and a wide range of lithofacies. It also occurs as a major component of patch reefs throughout the formation. The labechiids, in contrast, are highly diverse but most genera have restricted stratigraphic distributions, occurring in a narrow range of depositional environments. The size and growth form of stromatoporoids in the formation are considered to be primarily intrinsic characteristics of each genus but in some cases also seem to be related to lithofacies: clathrodictyids exhibit a wide spectrum of growth forms and have broader ecological plasticity and more flexible growth strategies than do labechiids. The Late Ordovician stromatoporoids of the Xiazhen Formation exhibit close biogeographic affinities to those of central New South Wales and the Tasmanian shelf of Australia. The discovery herein of Labyrinthodictyon and Stylostroma from the Upper Ordovician of South China further supports this close relationship. The stromatoporoids from South China exhibited one of the highest diversities of all paleocontinents during the Late Ordovician, suggesting that South China, together with Australia, was a locus of Late Ordovician stromatoporoid diversification.

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Section: Discussionmentioning

confidence: 99%

Late Ordovician stromatoporoids from the Xiazhen Formation of South China: Paleoecological and paleogeographical implications

et al. 2018

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“…In the Arina Formation (Porkuni stage) of Estonia, the stromatoporoids include the labechiid Pachystylostroma (rare) and clathrodictyid genera Clathrodictyon, Ecclimadictyon, and Stelodictyon (NeStor, 1964(NeStor, , 1999b. There are also records of Aulacera from the Stonewall Formation of southern Manitoba (BoltoN, 1988) and abundant Pachystylostroma in a carbonate bank from the informal Norwegian stage 5b interval at Ullerntangen in the Ringerike area, Norway (HaNkeN & oWeN, 1982, p. 128) that represent additional, confirmed Hirnantian localities.…”

Section: Hirnantianmentioning

confidence: 90%

“…A number of regions, such as Norway, Estonia, Taimyr Peninsula, Altai-Sayan Belt, Tuva, Mongolia, Qinghai (Qaidam Platform) and Zhejiang (southern China), exhibit stromatoporoid faunas for the first time. The wide distribution of stromatoporoids (both labechiids and clathrodictyids) seems to have coincided with the maximum circumequatorial spread of Ordovician reefs (WeBBy, 2002 JeaN (1961) and BoltoN (1988), from the most westerly occurrences (site no. 1) in Texas and New Mexico to Anticosti Island (site no.…”

Section: Katianmentioning

confidence: 95%

“…All seven Laurentian sites (no. 1-3, 6-9) exhibit labechiids, and a few of these, additionally, include records of the first clathrodictyid stromatoporoids (Clathrodictyon, Ecclimadictyon); e.g., from sites in southern Ontario, Manitoba, and Anticosti Island (BoltoN, 1988 Cystostroma, Labechiella, Stromatocerium, Cystistroma, Aulacera, Cryptophragmus, andLophiostroma (yavorSky, 1955, 1961;NeStor, 1976;BoGoyavleNSkaya, 1977). The Verkhoyansk-Kolyma Fold Belt incorporates a number of terranes that apparently remained close to the margins of the Siberian plate through the Cambrian and Ordovician, but rifted away during Middle Paleozoic time, according to GoloNka (2002).…”

Section: Katianmentioning

confidence: 99%

“…13). On Anticosti Island, the stromatoporoid genera occur in the Ellis Bay Formation and are dominantly the cylindrical labechiid Aulacera and the clathrodictyids Clathrodictyon and Ecclimadictyon (BoltoN, 1988;CameroN & Copper, 1994), as well as Labyrinthodictyon NeStor, Copper, & StoCk (2010, p. 74). In the Arina Formation (Porkuni stage) of Estonia, the stromatoporoids include the labechiid Pachystylostroma (rare) and clathrodictyid genera Clathrodictyon, Ecclimadictyon, and Stelodictyon (NeStor, 1964(NeStor, , 1999b.…”

Section: Hirnantianmentioning

confidence: 99%

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Treatise Online, no. 34: Part E, Revised, Volume 4, Chapter 14: Paleobiogeography of the Paleozoic Stromatoporoidea

Stock¹,

Nestor²,

Webby³

2012

TREON

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Palaeozoic stromatoporoid diagenesis: a synthesis

Kershaw

Munnecke

Jarochowska

et al. 2021

Facies

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Palaeozoic stromatoporoids, throughout their 100-million + year history (Middle Ordovician to Late Devonian and rare Carboniferous), are better preserved than originally aragonite molluscs, but less well-preserved than low magnesium-calcite brachiopods, bryozoans, trilobites and corals. However, the original mineralogy of stromatoporoids remains unresolved, and details of their diagenesis are patchy. This study of approximately 2000 stromatoporoids and the literature recognises three diagenetic stages, applicable throughout their geological history. Timing of processes may vary in and between stages; some components are not always present. Stage 1, on or just below sediment surface, comprises the following: micrite filling of upper gallery space after death, then filling of any remaining space by non-ferroan then ferroan calcite in decreasing oxygen of pore-waters; partial lithification of associated sediment from which stromatoporoids may be exhumed and redeposited, evidence of general early lithification of middle Palaeozoic shallow-marine carbonates; microdolomite formation, with the Mg interpreted to have been derived from original high-Mg calcite (HMC) mineralogy (likely overlaps Stage 2). Stage 2, short distance below sediment surface, comprising the following: fabric-retentive recrystallisation (FRR) of stromatoporoid skeletons forming fabric-retentive irregular calcite (FRIC), mostly orientated normal to growth layers, best seen in cross-polarised light. FRIC stops at stromatoporoid margins in contact with sediment and bioclasts. FRIC geometry varies, indicating some taxonomic control. Evidence that FRIC formed early in diagenetic history includes syntaxial continuation of FRIC into some sub-stromatoporoid cavities (Type 1 cement), although others were pre-occupied by early cement fills (Type 2 cement) formed before FRR, preventing syntaxial continuation of FRIC into cavities. Likely contemporaneous with FRIC formation, stromatoporoids in argillaceous micrites drew carbonate from adjacent sediment during reorganisation of argillaceous micrite into limestone–marl rhythms that are also early diagenetic. Stage 3, largely shallow burial, comprises the following: dissolution and silicification, but these may have occurred earlier in stromatoporoid diagenetic histories (more data required); burial pressure dissolution forming stylolites.

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Stromatoporoidea from the Ordovician rocks of central and eastern Canada

Cited by 9 publications

References 0 publications

Late Ordovician stromatoporoids from the Xiazhen Formation of South China: Paleoecological and paleogeographical implications

Late Ordovician stromatoporoids from the Xiazhen Formation of South China: Paleoecological and paleogeographical implications

Treatise Online, no. 34: Part E, Revised, Volume 4, Chapter 14: Paleobiogeography of the Paleozoic Stromatoporoidea

Palaeozoic stromatoporoid diagenesis: a synthesis

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