Open AccessSurficial geology, Adelaide Lake, Newfoundland and Labrador-Quebec, NTS 23-I northeast
Author(s) -
R C Paulen,
J M Rice,
Martin Ross
Publication year - 2019
Language(s) - English
Resource type - Reports
DOI - 10.4095/313655
Subject(s) - deglaciation , geology , drumlin , bedrock , glacial period , landform , ice sheet , seabed gouging by ice , outcrop , geomorphology , physical geography , ice stream , oceanography , cryosphere , geography , sea ice
The Adelaide Lake area is of moderate relief characterized by streamlined till blankets in the lowlands, and till veneers with extensive bedrock outcrops at higher elevations. The region was differentially eroded by the Laurentide Ice Sheet throughout Wisconsintime, multiple phases of ice flow imparted erosional ice-flow landforms and paleo-flow indicators on the landscape. However, the dominant eastward-trending, glacially streamlined landforms were formed by ice streaming during deglaciation. Terrain at higher elevations has been scoured by meltwatersfrom late-phase ablation of the ice sheet during deglaciation, which fed into an esker network splaying across the map area that trends from southeast to east-southeast. Lowland fens, glaciolacustrine strandlines, and littoral sediments that surround isolated streamlined till units in thesoutheastern portion of the map mark the former northeastern extent of inundation of a large, shallow glacial lake (glacial Lake Low).