Abstract
Between 7000 and 6000 yr B.P., relative sea level was as much as 5 m lower than today in the St. Lawrence estuary, Québec. A small transgression (Laurentian transgression) occurred between 5800 and 4400 yr B.P., which resulted in the construction of an 8- to 10-m terrace. About 3000 yr B.P., relative sea level was similar to present, and then a stillstand or a slight rise occurred during which a cliff (Micmac cliff) was cut into the emerged terrace. During a subsequent lowering of relative sea level (coastal emergence), a low aggradational terrace (Mitis terrace) was built between 2300 and 1500 yr B.P. at the base of the Micmac cliff. A new emergence curve for the south shore of the St. Lawrence estuary showing a mid-Holocene high stand of relative sea level is therefore proposed.
Publisher
Cambridge University Press (CUP)
Subject
General Earth and Planetary Sciences,Earth-Surface Processes,Arts and Humanities (miscellaneous)
Reference44 articles.
1. Environnements quaternaires et évolution postglaciaire d'une zone côtière en émersion en bordure sud du Bouclier canadien: La Moyenne Côte Nord du Saint-Laurent;Dubois,1980
2. Geomorphological Development and Post-Pleistocene Sea Level Changes, Northumberland Strait, Maritime Provinces
3. Presentation and assessment of tides and water level records for geophysical investigations
4. Les diatomées et les foraminifères de sédiments marins post-glaciaires du Bas-Saint-Laurent (Québec): Une analyse comparée des assemblages;Lortie;Naturaliste Canadien,1984
5. Atlas of Sea-Level Curves;Bloom,1977
Cited by
60 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献