Date of Award

1992

Degree Type

Thesis

Degree Name

M.Sc.

Department

Civil and Environmental Engineering

Keywords

Paleontology.

Rights

CC BY-NC-ND 4.0

Abstract

Changes in the temperature and salinity of the waters off eastern Gaspe Peninsula following the Late Quaternary deglaciation are recognized on the basis of benthonic foraminiferal zones in box, trigger weight and piston cores from depths of 373 and 109 m in the Laurentian Channel and Chaleur Trough respectively. The deglacial stage in the Laurentian Channel was characterized by oscillating low- (${<}25\perthous$) and high- (ca. 35$\perthous$) salinity bottom water. This was followed by bottom water with salinity between 34 and 35$\perthous$, and then a salinity minimum (30-34$\perthous$). Radiocarbon ages for foraminifera and pelecypods indicate that the deglacial stage began before 14 ka BP and ended approximately 13.5 ka BP; the salinity minimum began about 12.1 ka BP in the Laurentian Channel. Benthonic foraminiferal zones show that the temperature of the bottom water in Chaleur Trough has remained close to 0$\sp\circ$C since deglaciation. However, the salinity of the bottom water has increased from between 28 and 30$\perthous$ during the deglacial stage to about 33$\perthous$ at present. (Abstract shortened by UMI.)Dept. of Geology and Geological Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1992 .C453. Source: Masters Abstracts International, Volume: 31-04, page: 1706. Thesis (M.Sc.)--University of Windsor (Canada), 1992.

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