Upper Permian and Triassic conodont faunas from the type area of the Cache Creek Complex, south-central British Columbia, Canada

Beyers, J M; Orchard, Michael J.

doi:10.4095/132441

Cited by 10 publications

(7 citation statements)

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“…The results of our conodont biostratigraphic analysis are in agreement with the results of previous studies (Orchard and Beyers 1988;Beyers and Orchard 1991). Beyers and Orchard (1991) recognized two conodont faunas in their ''sect.…”

Section: Stratigraphysupporting

confidence: 92%

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Early Triassic peritidal carbonate sedimentation on a Panthalassan seamount: the Jesmond succession, Cache Creek Terrane, British Columbia, Canada

Sano

Onoue

Orchard

et al. 2011

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The Jesmond succession of the Cache Creek Terrane in southern British Columbia records late Early Triassic peritidal carbonate sedimentation on a mudflat of a buildup resting upon a Panthalassan seamount. Conodont and foraminiferal biostratigraphy dates the succession as the uppermost Smithian to mid-Spathian. The study section (ca. 91 m thick) is dominated by fine-grained carbonates and organized into at least 12 shallowing-upwards cycles, each consisting of shallow subtidal facies and overlying intertidal facies. The former includes peloidal and skeletal limestones, flat-pebble conglomerates, stromatolitic bindstones, and oolitic grainstone, whereas the latter consists mainly of dolomicrite. The scarcity of skeletal debris, prevalence of microbialite, and intermittent intercalation of flat-pebble conglomerate facies imply environmentally harsh conditions in the mudflat. The study section also records a rapid sea-level fall near the Smithian-Spathian boundary followed by a gradual sea-level rise in the early to mid-Spathian.

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Section: Stratigraphysupporting

confidence: 92%

“…Beyers and Orchard (1991) recognized two conodont faunas in their ''sect. 4'' which corresponds to the Jesmond succession.…”

Section: Stratigraphymentioning

confidence: 99%

Early Triassic peritidal carbonate sedimentation on a Panthalassan seamount: the Jesmond succession, Cache Creek Terrane, British Columbia, Canada

Sano

Onoue

Orchard

et al. 2011

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“…In contrast, deposits within exotic terranes in western Canada include a warm-water fauna containing Iranognathus and Clarkina? jesmondi in the type area of the Cache Creek Complex, of south-central British Columbia, Canada (Beyers and Orchard, 1991) that can be correlated with the Wuchiapingian of South China.…”

Section: Global Correlation Of Marine Lopingian Seriesmentioning

confidence: 99%

High‐resolution Lopingian (Late Permian) timescale of South China

et al. 2010

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The Lopingian represents the last epoch of the Palaeozoic Era and is bracketed by two severe biotic mass extinctions associated with dramatic environmental changes. The Lopingian Epoch lasted about 7 millions years and was also bracketed by large volcanic eruptions with the Emeishan volcanics at the base and the Siberian traps at the top. Considerable data have accumulated recently and in this paper we attempt to summarize these findings in a high-resolution Lopingian (Late Permian) timescale that integrates currently available multiple biostratigraphic, isotope chemostratigraphic, geochronologic and magnetostratigraphic data. In South China at least 13 conodont zones, multiple polarity zones and large carbon isotope fluctuations in the Lopingian are recognized and provide the high-resolution calibration that is essential to study this Late Permian interval characterized by Earth's largest biotic extinction. We also present a global correlation chart for the marine Lopingian Series.

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“…The rocks are, however, by no means oceanic, because they grade into greywacke and occur alternating with greywacke and conglomerate. The occurrence of the upper Middle to Upper Triassic conodonts in the Necoslie fauna indicates that the Middle to Late Triassic oceanic carbonate sedimentation actually occurred, even if scarcely, on the Pope buildup and its equivalents (e.g., Norian limestone pods in the Marble Range: Beyres and Orchard 1991). The Middle to Upper Triassic stratigraphic record is thought to have been mostly missing, owing to a strong submarine erosion and transportation at the top of a seamount (Schlager 1999).…”

Section: Origin Of Necoslie Breccia and Its Geologic Implicationmentioning

confidence: 98%

“…We infer an Early Triassic shallow-marine carbonate sedimentation on the Pope succession, with an emphasis upon the presence of the Lower Triassic limestone (Griesbachian to Spathian) of the Cache Creek Complex at several localities in the Marble Range, southern British Columbia (Beyers and Orchard 1991). The Lower Triassic limestone in the Marble Range is described as a stromatolitic microbialite with an oceanic affinity .…”

Section: Origin Of Necoslie Breccia and Its Geologic Implicationmentioning

confidence: 99%

Necoslie breccia: mixed conodont fauna-bearing neptunian dyke in Carboniferous-Permian seamount-capping oceanic buildup (Pope succession, Cache Creek Complex, central British Columbia)

Sano

Orchard

2004

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A mixed conodont fauna-bearing limestone breccia, informally designated as Necoslie breccia, crops out as an internal sediment hosted by the Lower Moscovian limestone unit of the Pope limestone succession (Bashkirian to Asselian) of Cache Creek Complex in central British Columbia, reconstructed as a mid-oceanic buildup upon a seamount, or an oceanic plateau. Necoslie breccia consists predominantly of limestone fragments derived from the host rocks, with subordinate isolated skeletal debris, all embedded in a matrix of fine-grained clastic carbonates. The mixed conodont fauna yields the youngest element indicative of Carnian. Our microscopic examination and conodont paleontological data show that Necoslie breccia is better defined as a neptunian dyke formed by infilling sedimentation of carbonates in a fracturing-generated submarine cavity, rather than a karstic cave-fill deposit. We postulate that infilling sedimentation took place immediately after the formation of the cavity, most likely in a transgression period during Carnian time.

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Upper Permian and Triassic conodont faunas from the type area of the Cache Creek Complex, south-central British Columbia, Canada

Cited by 10 publications

References 0 publications

Early Triassic peritidal carbonate sedimentation on a Panthalassan seamount: the Jesmond succession, Cache Creek Terrane, British Columbia, Canada

Early Triassic peritidal carbonate sedimentation on a Panthalassan seamount: the Jesmond succession, Cache Creek Terrane, British Columbia, Canada

High‐resolution Lopingian (Late Permian) timescale of South China

Necoslie breccia: mixed conodont fauna-bearing neptunian dyke in Carboniferous-Permian seamount-capping oceanic buildup (Pope succession, Cache Creek Complex, central British Columbia)

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