Conodont biostratigraphy of the Cache Creek Group in the Marble Range of south-central British Columbia

Orchard, M J; Beyers, J M

doi:10.4095/122696

Cited by 1 publication

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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%

“…Lower to Upper Triassic carbonates, though thinner and less conspicuous than their Permian counterparts, occur at several localities of the central belt of the Cache Creek Terrane in the Marble Range (Monger 1981;Orchard 1981;Orchard and Beyers 1988;Orchard 1989, 1991;Monger and McMillan 1989). Orchard (1989, 1991) described the upper Lower Triassic (Smithian to Spathian) conodont faunas from the carbonates at several localities in our study section.…”

Section: Geologic Settingmentioning

confidence: 99%

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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%

Section: Geologic Settingmentioning

confidence: 99%