Eolian Sandstones in Upper Triassic-Lower Jurassic Red Beds of the Fundy Basin, Nova Scotia

Hubert, John F.; Mertz, Karl A.

doi:10.1306/212f84fe-2b24-11d7-8648000102c1865d

Cited by 14 publications

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“…Strata here designated as the Red Head Member were not separated from the Wolfville Formation by earlier authors (e.g., Hubert and Mertz 1984) because they have a higher frequency of coarser-grained units in contrast to the comparatively finegrained portions of the Blomidon Formation. However, not only does the overall lithology (not just grain size) and facies of the Red Head Member differ dramatically from the underlying Wolfville Formation but it is also intimately interbedded with more typical Blomidon-like facies in sections contiguous with the type section (Fig.…”

Section: Evangeline Member Of the Wolfville Formation Aeolian Dunesmentioning

confidence: 85%

“…The informal names "Red Head beds" (Olsen 1997) and "Red Head member" (Olsen et al 2003b) have previously been used for the same interval. The type section is 32.5 m thick and was described by Hubert and Mertz (1984, fig. 9).…”

Section: Evangeline Member Of the Wolfville Formation Aeolian Dunesmentioning

confidence: 99%

“…A4). Maximum thickness of the Red Head Member in outcrop is in excess of 100 m as seen at Economy Mountain (Hubert and Mertz 1984), and it may be much thicker in the Bay of Fundy as seen in the Chinampas N-37 and Cape Spencer P-79 wells, where it may be up to 620 and 446 m thick, respectively -although it is difficult to identify the member accurately using cuttings and so these estimates are uncertain.…”

mentioning

confidence: 99%

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Stratigraphic and temporal context and faunal diversity of Permian-Jurassic continental tetrapod assemblages from the Fundy rift basin, eastern Canada

Sues

Olsen

2015

atgeol

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The Fundy basin in Nova Scotia and New Brunswick is the largest exposed rift basin of the Newark Supergroup and also extends beneath the Bay of Fundy. Its strata can be divided into four tectonostratigraphic sequences (TS). TS I is represented by the probably Permian Honeycomb Point Formation and possibly the Lepreau Formation. TS II includes the Wolfville Formation with the probably Middle Triassic Economy Member and the early Late Triassic Evangeline Member. These members have yielded markedly different assemblages of continental tetrapods. TS III comprises most of the Blomidon Formation, which is Norian to Rhaetian in age. The Blomidon Formation has yielded few skeletal remains of tetrapods to date but many tetrapod tracks. TS IV includes the late Rhaetian top of the Blomidon Formation and the McCoy Brook Formation, which overlies the North Mountain Basalt and is latest Rhaetian and earliest Jurassic (Hettangian) in age. The McCoy Brook Formation has yielded a diversity of continental tetrapods and lacks any of the characteristic Late Triassic forms. Recent work has correlated the Global Boundary Stratotype Section and Point (GSSP) for the base of the Jurassic (Hettangian) to a level well above the North Mountain Basalt. Thus most of the tetrapod fossils from the McCoy Brook Formation are latest Rhaetian in age, but the higher horizon with skeletal remains of sauropodomorph dinosaurs may be earliest Hettangian in age. The Fundy basin preserves the only known, stratigraphically tightly constrained record of the profound biotic changes in continental ecosystems across the Triassic-Jurassic transition.

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Section: Evangeline Member Of the Wolfville Formation Aeolian Dunesmentioning

confidence: 85%

Section: Evangeline Member Of the Wolfville Formation Aeolian Dunesmentioning

confidence: 99%

mentioning

confidence: 99%

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Stratigraphic and temporal context and faunal diversity of Permian-Jurassic continental tetrapod assemblages from the Fundy rift basin, eastern Canada

Sues

Olsen

2015

atgeol

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Transtensional arm of the early Mesozoic Fundy rift basin: Penecontemporaneous faulting and sedimentation

Olsen

Schlische

1990

Geol

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North Mountain basalt from Digby, Nova Scotia: models for a fissure eruption from stratigraphy and petrochemistry

Papezik¹,

Greenough²,

Colwell³

et al. 1988

Can. J. Earth Sci.

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The early Mesozoic, quartz normative, North Mountain basalts in southwestern Nova Scotia (Digby area) form three units: a coarse massive lower flow (~190 m) bearing minor lenses of mafic pegmatite, a middle unit of thin amygdaloidal basaltic flows (~50 m), and an upper flow unit of massive phenocryst-rich basalt (~160 m). The two thick units show phenocrysts of orthopyroxene (bronzite) and (or) pigeonite, augite, and zoned plagioclase in a granular matrix of augite, pigeonite, and plagioclase. Variation diagrams and chondrite-normalized rare-earth-element patterns relate all chemical diversity between and within flows to removal and (or) accumulation of plagioclase and pyroxene phenocrysts (~1:1). High K, Rb, and Ba, appear related to assimilation of continental crust. Constancy of fractionation-independent element ratios and variations in phenocryst content vertically and along the 200 km strike of the basalts suggest (1) crystal settling and accumulation together with assimilation and mixing in a lower crustal magma chamber, (2) rise to upper crustal levels in a central conduit followed by northeast-ward emplacement along a tension-induced dyke system, and (3) extrusion along a fissure in two major and numerous minor pulses that formed the lower, upper, and middle units. Assimilation did not occur as magma moved through the dyke system, for assimilation-related variations in composition do not occur along strike.

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Eolian Sandstones in Upper Triassic-Lower Jurassic Red Beds of the Fundy Basin, Nova Scotia

Cited by 14 publications

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Stratigraphic and temporal context and faunal diversity of Permian-Jurassic continental tetrapod assemblages from the Fundy rift basin, eastern Canada

Stratigraphic and temporal context and faunal diversity of Permian-Jurassic continental tetrapod assemblages from the Fundy rift basin, eastern Canada

Transtensional arm of the early Mesozoic Fundy rift basin: Penecontemporaneous faulting and sedimentation

North Mountain basalt from Digby, Nova Scotia: models for a fissure eruption from stratigraphy and petrochemistry

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