Morphological Analysis of Folded Layers from Lower Paleozoic Rocks, Mt. Albert Area, Gaspé Peninsula, Quebec

A. Carrara

doi:10.1086/627888

Biostratigraphic significance of lower Paleozoic microfaunas from eastern Canada

Canadian Journal of Earth Sciences ◽

10.1139/e03-094 ◽

2004 ◽

Vol 41 (5) ◽

pp. 489-505 ◽

Cited By ~ 6

Author(s):

Esther Asselin ◽

Aïcha Achab ◽

Azzedine Soufiane

Keyword(s):

New Brunswick ◽

Lower Devonian ◽

Head Group ◽

Upper Ordovician ◽

Eastern Canada ◽

Lower Paleozoic ◽

Anticosti Island ◽

Gaspe Peninsula ◽

Gaspé Peninsula ◽

Mapping Program

Chitinozoan studies recently carried out in the Appalachian Forelands and St. Lawrence Platform National Geoscience Mapping Program (NATMAP) project have confirmed the regional biostratigraphic value of a number of chitinozoan species and led to a better documentation of their stratigraphic and geographic distribution in eastern Canada. The typical Darriwilian microfaunas first described from the Table Head Group of western Newfoundland and containing Conochitina chydaea are now recognised in the Rivière Ouelle Formation at Les Méchins, Gaspé Peninsula. In the Upper Ordovician successions of the St. Lawrence Platform at Neuville and in the Charlevoix area, Quebec, Conochitina primitiva is indicative of the multidenspre-americanus graptolite zonal range, Hercochitina duplicitas of the americanus Zone, and Hercochitina spinetum and Acanthochitina cancellata characterize the ruedemanni lower spiniferus zonal interval. The occurrence of Cyathochitina vaurealensis and Hercochitina crickmayi in turbidite deposits of the Grog Brook Group of northwestern New Brunswick confirms the minimal facies dependence of these two Richmondian index species. Eisenackitina dolioliformis, characteristic of the late Aeronian and Telychian successions of Arctic Canada, Gaspé Peninsula, and Anticosti Island, is now recognised in samples from the Upsalquitch Formation of northwestern New Brunswick and the Cabano Formation of the Rimouski area in Quebec. The palynological data from Devonian successions of the Matapedia Valley, the Rimouski area, and the Beauce Eastern Townships region show that the succession of Lower Devonian chitinozoan assemblages of the Forillon Peninsula based on short-ranging species can be used in establishing regional correlations in the Gaspé Belt.

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Weather and Outbreaks of the Spruce Budworm in the Province of Quebec from 1939 to 1956

The Canadian Entomologist ◽

10.4039/ent93118-2 ◽

1961 ◽

Vol 93 (2) ◽

pp. 118-123 ◽

Cited By ~ 22

Author(s):

J. G. Pilon ◽

J. R. Blais

Keyword(s):

Choristoneura Fumiferana ◽

Abies Balsamea ◽

Spruce Budworm ◽

Balsam Fir ◽

The Past ◽

Forest Regions ◽

Tree Component ◽

Gaspe Peninsula ◽

Gaspé Peninsula

Nearly all forest regions in the Province of Quebec where balsam fir (Abies balsamea (L.) Mill.) is an important tree component have been subjected to severe defoliation by the spruce budworm, Choristoneura fumiferana (Clem.), during the past 20 years. These outbreaks have followed an easterly direction beginning near the Ontario-Quebec border in 1939 and ending in the Gaspé Peninsula in 1958.

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A missing link in the peri-Gondwanan terrane collage: the Precambrian basement of the Moroccan Meseta and its lower Paleozoic cover

Canadian Journal of Earth Sciences ◽

10.1139/cjes-2017-0086 ◽

2018 ◽

Vol 55 (1) ◽

pp. 33-51 ◽

Cited By ~ 15

Author(s):

Dominik Letsch ◽

Mohamed El Houicha ◽

Albrecht von Quadt ◽

Wilfried Winkler

Keyword(s):

Carbonate Platform ◽

Source Area ◽

Source Rocks ◽

Lower Paleozoic ◽

Northern Margin ◽

Precambrian Geology ◽

The North ◽

Late Cambrian ◽

Paleozoic Rocks ◽

Rifted Margin

This article provides stratigraphic and geochronological data from a central part of Gondwana’s northern margin — the Moroccan Meseta Domain. This region, located to the north of the Anti-Atlas area with extensive outcrops of Precambrian and lower Paleozoic rocks, has hitherto not received much attention with regard to its Precambrian geology. Detrital and volcanic zircon ages have been used to constrain sedimentary depositional ages and crustal affinities of sedimentary source rocks in stratigraphic key sections. Based on this, a four-step paleotectonic evolution of the Meseta Domain from the Ediacaran until the Early Ordovician is proposed. This evolution documents the transition from a terrestrial volcanic setting during the Ediacaran to a short-lived carbonate platform setting during the early Cambrian. The latter then evolved into a rifted margin with deposition of thick siliciclastic successions in graben structures during the middle to late Cambrian. The detritus in these basins was of local origin, and a contribution from a broader source area (encompassing parts of the West African Craton) can only be demonstrated for postrifting, i.e., laterally extensive sandstone bodies that seal the former graben. In a broader paleotectonic context, it is suggested that this Cambrian rifting is linked to the opening of the Rheic Ocean, and that several peri-Gondwanan terranes (Meguma and Cadomia–Iberia) may have been close to the Meseta Domain before drifting, albeit some of them seem to have been constituted by a distinctly different basement.

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