Quaternary environmental change in the Stikine Plateau region, northwestern British Columbia, Canada ...

• Main Author: Spooner, Ian Stewart
• Format: Article in Journal/Newspaper
• Language: English
• Published: University of Calgary 1994
• Subjects: QE 696 S726 1994a; Additional Copy QE 696 S726 1994; Geology, Stratigraphic - Quaternary; Geology - British Columbia - Stikine River region; Stikine River
• Online Access: https://dx.doi.org/10.11575/prism/15661; https://prism.ucalgary.ca/handle/1880/30361

Bibliography: p. 289-313. ... : Records of Quaternary environmental change have been resolved on the Stikine Plateau of northwestern British Columbia. Glacial sediment has been preserved between Early Pleistocene basalt flows on Mt. Edziza and underneath Middle Pleistocene basalt flows in the Stikine River valley. The Mt. Edziza record indicates that regional ice advanced from the southwest and west of Mt. Edziza and inundated the plateau. Radiometric and paleomagnetic dating indicates sediment deposition occurred during isotope stages 24 to 26. Paleomagnetic sampling resulted in the resolution of the Jaramillo normal polarity event within the section. The Stikine River valley section indicates that river blockage and glaciolacustrine sediment deposition occurred at about 330 ± 30 ka (isotope stage 10). The blockage was a result of early ice advance in the Coast Mountains and eventual regional ice cover is indicated by till overlying the glaciolacustrine sediment. Advance-phase glaciolacustrine sediment deposited in the Stikine River ...