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TitleÉtude préliminaire des formations quaternaires comblant les vallées des basses Laurentides, nord-ouest de Montréal, Québec
AuthorRoss, M; Parent, M; Bolduc, A M; Hunter, J; Benjumea, B
SourceGeological Survey of Canada, Current Research (Online) no. 2001-D5, 2001, 19 pages, (Open Access)
PublisherNatural Resources Canada
Mediapaper; on-line; digital; CD-ROM
RelatedThis publication is contained in Geological Survey of Canada; (2001). Current Research 2001, winter release, Geological Survey of Canada, Current Research no. 2001
File formatpdf
NTS31G/06; 31G/07; 31G/08; 31G/09; 31G/10; 31G/11
AreaMontréal; Oka; Lachure; Laurentides
Lat/Long WENS-75.5000 -74.0000 45.7500 45.2500
Subjectssurficial geology/geomorphology; sedimentology; stratigraphy; geophysics; seismic interpretations; aquifers; groundwater pollution; groundwater movement; glaciolacustrine deposits; boreholes; sands; gravels; clays; tills; sedimentary facies; sedimentary structures; Quaternary
Illustrationssketch maps; borehole logs; seismic profiles
Released2001 01 01
AbstractThis report presents some preliminary results from the 1999 and 2000 field work conducted to investigate the strati- graphic architecture and sedimentological characteristics of surficial sediments in an area northwest of Montréal. Four targeted boreholes and a land-based, shallow, high-resolution seismic profile are described and interpreted. These data will be used to produce a geological model for defining the movement of groundwater and evaluating the vulnerability of regional aquifers to contamination. Preliminary results reveal a complex late-glacial topography suggesting the existence of a former channelized subglacial drainage system. Furthermore, some of these valleys contain subaqueous outwash deposits of possible glaciolacustrine origin. These deposits are excellent confined aquifers that must be fully integrated in regional groundwater models.