Molluscan biostratigraphy and paleomagnetism of Campanian strata, Queen Charlotte Islands, British Columbia: implications for Pacific coast North America biochronology

Haggart, James W.; Ward, Peter D.; Raub, Timothy D.; Carter, Elizabeth S.; Kirschvink, Joseph L.

doi:10.1016/j.cretres.2009.02.005

Cited by 19 publications

(8 citation statements)

References 35 publications

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“…The age range of marine strata within the Nanaimo Basin, representing arguably >90% of the succession, is well constrained biostratigraphically. Muller and Jeletzky (1970) established the modern biostratigraphic subdivisions of the Nanaimo Group sensu stricto based on ammonites and inoceramid bivalves, and this framework has been subsequently refined and improved (Ward, 1978;Haggart et al, 2005Haggart et al, , 2009Ward et al, 2012;Haggart and Graham, 2018). This modern biostratigraphic framework, supported by microfossil studies (McGugan, 1962), has demonstrated that the typical succession of the Nanaimo Group ranges in age from mid-Santonian to Maastrichtian.…”

Section: Biostratigraphic Age Constraintsmentioning

confidence: 97%

Evolution of the Late Cretaceous Nanaimo Basin, British Columbia, Canada: Definitive provenance links to northern latitudes

et al. 2021

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Accurate reconstruction of the Late Cretaceous paleogeography and tectonic evolution of the western North American Cordilleran margin is required to resolve the long-standing debate over proposed large-scale, orogen-parallel terrane translation. The Nanaimo Basin (British Columbia, Canada) contains a high-fidelity record of orogenic exhumation and basin subsidence in the southwestern Canadian Cordillera that constrains the tectonic evolution of the region. Integration of detrital zircon U-Pb geochronology, conglomerate clast U-Pb geochronology, detrital muscovite 40Ar/39Ar thermochronology, and Lu-Hf isotopic analysis of detrital zircon defines a multidisciplinary provenance signature that provides a definitive linkage with sediment source regions north of the Sierra Nevada arc system (western United States). Analysis of spatial and temporal provenance variations within Nanaimo Group strata documents a bimodal sediment supply with a local source derived from the adjacent magmatic arc in the southern Coast Mountains batholith and an extra-regional source from the Mesoproterozoic Belt Supergroup and the Late Cretaceous Atlanta lobe of the Idaho batholith. Particularly robust linkages include: (1) juvenile (εHf >+10) Late Cretaceous zircon derived from the southern Coast Mountains batholith; (2) a bimodal Proterozoic detrital zircon signature consistent with derivation from Belt Supergroup (1700–1720 Ma) and ca. 1380 Ma plutonic rocks intruding the Lemhi subbasin of central Idaho (northwestern United States); (3) quartzite clasts that are statistical matches for Mesoproterozoic and Cambrian strata in Montana and Idaho (northwestern United States) and southern British Columbia; and (4) syndepositional evolved (εHf >−10) Late Cretaceous zircon and muscovite derived from the Atlanta lobe of the Idaho batholith. These provenance constraints support a tectonic restoration of the Nanaimo Basin, the southern Coast Mountains batholith, and Wrangellia to a position outboard of the Idaho batholith in Late Cretaceous time, consistent with proposed minimal- fault- offset models (<~1000 km).

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Section: Biostratigraphic Age Constraintsmentioning

confidence: 97%

Evolution of the Late Cretaceous Nanaimo Basin, British Columbia, Canada: Definitive provenance links to northern latitudes

et al. 2021

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“…Evidence for shallow formation include external laminae deflection, high minus-cement porosities, the protection of delicate shells and otherwise primary depositional features in concretions, the preservation of magnetic mineral orientations (Wynne et al 1995;Haggart et al 2009), the recovery of nodules in relatively shallow (, 600 meters below seafloor) drill cores, and limited-depth reconstructed burial histories for the host unit. Maximum burial depths have been quantified for the British (Hudson 1978) and Moeraki (Boles et al 1985) concretions examined here.…”

Section: High Concretion Body Temperaturesmentioning

confidence: 99%

Clumped-Isotope Constraints On Cement Paragenesis In Septarian Concretions

Loyd¹,

Dickson²,

Boles³

et al. 2014

Journal of Sedimentary Research

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Septarian concretions exhibit multiple generations of cements that include body, fringe, and spar phases. Classic paragenetic interpretations include initial precipitation of the body followed by fringe(s) and then by spar in more or less discrete events. Traditional approaches (e.g., carbon and oxygen isotope analyses) are generally unable to distinguish paragenetic trends as they relate to specific formation environments (e.g., precipitation during burial or with meteoric influx O fluid compositions of , 214 to +4% (VSMOW). In stable-isotope cross-plots, specific cement phases group together and confirm the paragenesis indicated by superposition. In some cases, samples analyzed from concretion bodies yield temperature and d18 O fluid values that indicate formation at shallow depths, consistent with independent data (e.g., high minus-cement porosity, external laminae deflection). In contrast, other concretion-body analyses indicate relatively high body temperatures that conflict with shallow-formation indices. Petrographic and backscatter scanning electron microscopy (SEM) reveal that concretion bodies partially consist of a secondary, replacement phase, which could explain the higher temperatures expressed in bulk body samples. Based on data for different phases in these septarian concretions, we suggest that initial body-cement precipitation occurred at relatively shallow depths from unmodified seawater, followed by fringe formation at elevated temperatures that likely coincided with the emplacement of the secondary body phase. When considered together, late-stage spar phases exhibit temperatures and d18 O fluid values supportive of spar precipitation from fluids with a significant meteoric component, possibly during uplift.

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“…Haida Formation sediments grade upward into siltstone, mudstone, and shale, the upper part of which recently has been reassigned to the Bearskin Bay Formation (Dalby et al 2009). The Bearskin Bay Formation ranges from Albian to Cenomanian, but molluscan and foraminiferal taxa indicate a middle to late Albian age for the deposits from which the fernbearing concretion was recovered (Stritch and Schröder-Adams 1999;Dalby et al 2009;Haggart et al 2009). …”

Section: Methodsmentioning

confidence: 98%

Mesozoic Diversity of Osmundaceae: Osmundacaulis whittlesii sp. nov. in the Early Cretaceous of Western Canada

Smith

Rothwell

Stockey

2015

International Journal of Plant Sciences

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. The University of Chicago Press is collaborating with JSTOR to digitize, preserve and extend access to International Journal of Plant Sciences. Editor: Andrew KnollPremise of research. A distinctive new species of osmundaceous fern, based on a permineralized trunk from Lower Cretaceous deposits of Haida Gwaii (formerly the Queen Charlotte Islands) off the west coast of mainland Canada, provides additional data for addressing the Mesozoic diversity and the overall pattern of phylogeny for osmundaceous filicalean ferns.Methodology. The specimen was cut into segments and studied from both external morphology and anatomical sections prepared by the cellulose acetate peel technique. Microscope slides of sections were examined, and images were captured under transmitted light.Pivotal results. The fossil represents a new species of Osmundacaulis, which is only the third Northern Hemisphere representative of this predominantly Southern Hemisphere genus.Conclusions. Osmundacaulis whittlesii sp. nov. increases the Northern Hemisphere diversity of Cretaceous Osmundaceae, thus providing new data about Mesozoic diversity of the clade, potential sister-group relationships of crown-group Osmundaceae, and the overall pattern of phylogeny for Osmundaceae.

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Molluscan biostratigraphy and paleomagnetism of Campanian strata, Queen Charlotte Islands, British Columbia: implications for Pacific coast North America biochronology

Cited by 19 publications

References 35 publications

Evolution of the Late Cretaceous Nanaimo Basin, British Columbia, Canada: Definitive provenance links to northern latitudes

Evolution of the Late Cretaceous Nanaimo Basin, British Columbia, Canada: Definitive provenance links to northern latitudes

Clumped-Isotope Constraints On Cement Paragenesis In Septarian Concretions

Mesozoic Diversity of Osmundaceae: Osmundacaulis whittlesii sp. nov. in the Early Cretaceous of Western Canada

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