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We use new and existing nannofossil, palynological, and microfossil biostratigraphic data in conjunction with lithologic and geophysical logs from four wells to establish a series of sequence-stratigraphic events in the Mesozoic-Cenozoic of the Laurentian Subbasin of offshore Newfoundland, eastern Canada. Well biostratigraphic events are integrated with reflection seismic in the area to correlate regional seismic stratigraphic surfaces. The four wells are: Bandol-1, Emerillon C-56, East Wolverine G-37, and Heron H-73. We extend the event stratigraphic scheme previously developed for the Scotian Margin, offshore Nova Scotia, into new areas to the east along the southern Grand Banks, where we recognize four new well-log sequence stratigraphic events, and we modify the definition of a previously recognized regional surface. The new and modified regional surfaces are the Early Albian Unconformity, the Late Bathonian Maximum Flooding Surface (MFS), the Late Bajocian MFS (renamed from Bathonian/Bajocian MFS), the ?Bajocian/Toarcian Unconformity, and the Late Pliensbachian MFS. We recognize the 'Avalon Unconformity' and 'Base-Tertiary Unconformity' of previous studies as amalgamations of multiple smaller-scale unconformities and refine their age in the studied wells. A major improvement over our earlier Scotian Margin event schemes is the extension of the event stratigraphy into the Early Jurassic using a suite of marine biostratigraphic markers. We compare the Early Jurassic event scheme to Deep Sea Drilling Project Site 547B on the conjugate Moroccan Margin to better constrain potential source rock intervals and the early history of the central Atlantic Ocean. Nous utilisons des donn es biostratigraphiques sur les microfossiles, des donn es palynologiques et des donn es sur les nanofossiles, nouvelles et existantes, conjointement avec des diagraphies lithologiques et g ophysiques de quatre puits pour d finir une s rie de ph nom nes stratigraphiques s quentiels de la tranche du M sozo que-C nozo que du sous-bassin Laurentien au large des c tes de Terre-Neuve, dans l'est du Canada. Les ph nom nes biostratigraphiques des puits sont int gr s la sismique r flexion dans le secteur aux fins d'une corr lation des surfaces stratigraphiques sismiques r gionales. Les quatre puits en question sont les puits Bandol-1, Emerillon C-56, East Wolverine G-37 et Heron H-73. Nous largissons le plan stratigraphique des ph nom nes pr c demment cr pour la marge de Scotian, au large des c tes de la Nouvelle- cosse, aux nouveaux secteurs l'est le long de la zone m ridionale des Grands bancs, o nous reconnaissons quatre nouveaux ph nom nes stratigraphiques s quentiels dans les diagraphies des puits et nous modifions la d finition d'une surface r gionale ant rieurement reconnue. Les nouvelles surfaces r gionales modifi es sont la discordance de l'Albien pr coce, la surface d'inondation maximale (SIM) du Bathonien tardif, la SIM du Bajocien tardif (SIM du Bathonien/Bajocien rebaptis e), la discordance bajocienne?/toarcienne et la SIM du Pliensbachien tardif. Nous reconnaissons la << discordance d'Avalon >> et la << discordance de base-tertiaire >> d' tudes ant rieures en tant que regroupements de plusieurs discordances d' chelle plus modeste et nous d terminons leur ge de fa on plus pr cise dans les puits tudi s. Une am lioration notable par rapport nos plans ant rieurs des ph nom nes survenus dans la marge de Scotian est l' largissement de la stratigraphie des ph nom nes au cours du Jurassique pr coce au moyen de rep res stratigraphiques marins. Nous comparons le plan des ph nom nes du Jurassique pr coce au site 547B du projet de forage en eau profonde sur la marge marocaine conjugu e pour mieux limiter les intervalles ventuels de roche m re et les d buts de l'oc an Atlantique central., INTRODUCTION The Scotian Margin Play Fairway Analysis (PFA) project was a multidisciplinary study (under the auspices of the Offshore Energy Technology Research Association of Nova Scotia; OERA 2011) that examined [...]

During the spring of 2018, residents Gary, David, and Rick Leblanc, found a near-horizontal burrow fossil within red sandstone along a ditch outcrop at Midland, New Brunswick. These red sandstones, [...]

A palynological (plant spores) biostratigraphic study of the Tournaisian (Early Carboniferous) aged sites between the townships of Bloomfield and Norton, New Brunswick is being conducted. Newly collected and historical samples [...]

Basins along the Scotian Margin formed as part of North Atlantic opening, with Middle Triassic rifting leading to eventual Early-Middle Jurassic breakup. In the overlying passive margin succession, the Lower Cretaceous section is dominated by siliciclastic deposits reported from a variety of marine, shallow marine, and fluvial settings. In concert with ongoing palynological analyses, the present study contributes to the development of an event stratigraphic scheme by focussing on paleoenvironmental interpretations. Ichnological and sedimentological analyses were used to build a preliminary facies model, with an initial focus on the Upper Member of the Missisauga Formation conventional cores from Panuke B-90 and Cohasset A-52. Depositional conditions began as wave-influenced normal marine, with a distal Skolithos Ichnofacies. Restricted bay and possible deltaic deposits followed, with wave-influence decreasing up section and the ichnofossil assemblage gradually replaced by an impoverished archetypal expression of the Cruziana Ichnofacies. Overlying sandstone bodies are interpreted as tidally influenced estuarine channels based on the presence of herringbone cross-stratification, cyclical bedding, wood with Teredolites borings, and rare elements of a highly impoverished Skolithos Ichnofacies; however, barrier shoreface and tidal flats are present, suggesting a mixed wave- and tide-influenced estuary. Outer estuary conditions followed, with barrier shoreface, tidal flat and central bay deposits. Impoverished Cruziana Ichnofacies dominate, with elements of the Skolithos Ichnofacies locally present. The top of the Missisauga Formation shows indication of more normal marine conditions, with intermittent marine macrofauna and limited ichnological suites implying some degree of dysoxia. Storm influence is evident near the transition into the overlying Naskapi Member of the Logan Canyon Formation based on the presence of possible hummocky cross-stratification, a weakly stressed Cruziana Ichnofacies and more diverse marine macrofauna. Future work will entail detailed facies analysis and comparison with palynofacies to build a comprehensive paleoenvironmental model and a refined sequence stratigraphic framework. [ABSTRACT FROM AUTHOR]

The Carboniferous Joggins Fossil Cliffs UNESCO World Heritage Site in Nova Scotia, Canada, has long been known for its extensive paleobiodiversity. The ichnofossil record at Joggins is less known than the body fossil record. Amongst the extensive ichnological collections of the late citizen-scientist Donald Reid is a morphologically unique shrimp-shaped cubichnium (resting trace). The trace fossil is associated with a faint invertebrate trackway that leads up to the resting trace and establishes its identification as an invertebrate resting trace. The trace fossil was recovered from the upper Joggins Formation (876 m above the base), and was found in finegrained, rippled sandstones interpreted to be from an open-water to poorly drained lithofacies assemblage transition. The trace fossil slab studied here also has examples of the invertebrate resting traces Selenichnites and Rusophycus preserved in convex hyporelief; these traces are commonly attributed to horseshoe crabs and crustaceans, respectively. They co-occur in the same stratigraphic horizon with Kouphichnium trackways, interpreted to be produced by xiphosurans. The upper Joggins Formation has previously yielded body fossils of Pygocephalus shrimp preserved in organic-rich limestones and sideritic-ironstone nodules. Pygocephalus body fossils are common at Joggins, but no trace fossils have been assigned to this invertebrate, perhaps having gone unrecognized until now. The trace fossil newly described here as Pygocephalichnium reidi is interpreted to have been produced by a Pygocephalus shrimp based on its morphological similarities to known body fossils from the Joggins Formation, and we propose that this new trace fossil morphology warrants a new ichnotaxon, Pygocephalichnium reidi. [ABSTRACT FROM AUTHOR]