An Interpretation of Late Quaternary Glacial Flow Indicators in the Baie des Chaleurs Region, Northern New Brunswick

摘要: A sequence of late Quaternary geologic events in northern New Brunswick is determined from striation analysis derived published data, open file reports, and field research conducted by the authors since 1985. These data are integrated with clast provenance fabric trend analysis, as well information other studies surrounding area. South Baie des Chaleurs, a complicated Late Wisconsinan glacial history preserved form erosive features including nailhead striae, miniature crag-and-tails, various scars, striations, fractures. The rarity sedimentary deposits datable materials precludes simple stratigraphie interpretation. Based on over 1,000 sites, we conclude four major phases flow affected area during Wisconsinan: 1) an early to southeast which reflects local Appalachian ice; 2) second phase east indicating Laurentide ice influence western Brunswick; 3) third north-northeast, may represent response drawdown Chaleurs; 4) final multidirectional localized last stages glaciation. absence Canadian Shield erratics explained terms streaming along St. Lawrence channel beneath southward-flowing Ice Sheet. Basal debris (including erratics) was apparently truncated removed obliquely flowing stream, leaving relatively clean Sheet it entered Gaspesie ultimately Brunswick.