GSA in the Field in 2020

COVID-19 made for a highly unusual year as it affected almost every facet of life. The pandemic made gathering and visiting the field nearly impossible as we quarantined and moved into virtual spaces. Three groups submitted guides for publication during the height of the pandemic: two for trips that would have taken place during the GSA Annual Meeting in Montréal, Canada, and one from the Rocky Mountain Section Meeting in Provo, Utah, USA. Readers will enjoy these journeys to the Ottawa aulacogen/graben on the Northeast U.S.–Canadian border; the southern Québec Appalachians; and Lake Bonneville, the Wasatch Range, and Great Salt Lake in Utah.
From obduction to collision: A transect across Ordovician to Devonian sedimentary basins of the Québec Appalachians, Canada
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Published:July 12, 2021
ABSTRACT
This three-day field trip focuses on the stratigraphy and the structural characteristics of the late- and post-Taconian sedimentary basins of the southern Québec Appalachians, with a particular emphasis on N-to-S and W-to-E structural and lithological variations. In order to discuss various aspects of the regional structural evolution of these basins, we will visit a series of key outcrops following three sections, the Beauce/Thetford-Mines sections, the Sherbrooke section, and the Coaticook section.
RÉSUMÉ
Cette excursion de trois jours se concentre sur la stratigraphie et les caractéristiques structurales des bassins sédimentaires tardi- et post-Taconien des Appalaches du sud du Québec, en mettant l’accent sur les variations structurales et lithologiques du nord au sud et d’ouest en est. Afin de discuter des divers aspects de l’évolution structurale régionale de ces bassins sédimentaires, nous visiterons une série d’affleure ments clés en suivant trois sections, soient les sections de Beauce/Thetford-Mines, de Sherbrooke, et de Coaticook.
- Appalachians
- basins
- Beauce County Quebec
- Canada
- Devonian
- Eastern Canada
- field studies
- field trips
- mica group
- mines
- muscovite
- nesosilicates
- North America
- obduction
- Ordovician
- orthosilicates
- Paleozoic
- plate collision
- plate tectonics
- Quebec
- road log
- sedimentary basins
- sheet silicates
- Sherbrooke County Quebec
- silicates
- Taconic Orogeny
- Thetford Mines
- zircon
- zircon group
- detrital zircon
- Coaticook Quebec