Academic literature on the topic 'La Guadeloupe (Québec)'

In the Appalachians of southern Quebec, the contact between Siluro-Devonian rocks of the Connecticut Valley – Gaspé Synclinorium and the Cambro-Ordovician rocks of the Dunnage Zone is marked by an important thrust fault striking northwest, La Guadeloupe fault. This fault separates two stratigraphically distinct domains, but the regional deformations are related to the same orogenic period. In the Sherbrooke and Weedon areas, different structural features show evidence of La Guadeloupe fault and reveal its kinematics. The exposed rocks near the fault exhibit structures that indicate a strong deformation zone. The deformation includes well-developed stretching lineations and shearing zones. The ductile deformation is restricted to the Cambro-Ordovician rocks. Macroscopic and microscopic studies of samples from the shear zones related to La Guadeloupe fault reveal, systematically, a tectonic transport from southwest to northwest. This interpretation is supported by the quartz crystallographic c-axis orientation. In New England, La Guadeloupe fault seems to coincide with the Taconic unconformity, though a bifurcation of the pre-Silurian units exposed on the western side of this unconformity remains possible. In Quebec, the correlation and kinematics of La Guadeloupe fault extension towards the northeast are not completely understood. [Journal Translation]

The Ascot–Weedon Formation and Magog Group are part of the Cambro-Ordovician oceanic domain of the Quebec Appalachians. The purpose of this work is to define the stratigraphic and structural relationships that exist between these units and the Siluro-Devonian sedimentary rocks: the Lac Aylmer Formation, to the northwest, and the St-Francis Group, to the southeast. Two structural domains are defined in the area. The first one, the northwestern zone, is essentially autochthonous. The Magog Group units are overlain by the Siluro-Devonian sediments of the Lac Aylmer Formation. Both units make up the northwest flank of the St-Victor Synclinorium, plunging slightly to the southwest. The second domain, to the southeast is made up of allochthons (Ascot–Weedon Formation and St-Francis Group) thrust on a large part of the southeast flank of the St-Victor Synclinorium. Structural analysis at mesoscopic, microscopic, and macroscopic scales indicates that the Ascot–Weedon Formation and the St-Francis Group are thrust northwesterly on southeast-dipping imbricate faults. Rocks of both units underlie the major La Guadeloupe Fault, bringing the Connecticut Valley – Gaspé Synclinorium over the St-Victor Synclinorium.