Publication information

Geological Survey of Canada
Open File 8832

3-D model of the Quaternary sediments in the St. Lawrence valley and adjacent regions, southern Quebec and eastern Ontario

M. Parent, M. Ross, D. Howlett, and K. Bédard 

© Her Majesty the Queen in Right of Canada, as represented by the Minister of Natural Resources, 2021

Permanent link: https://doi.org/10.4095/329082

Publications in this series have not been edited; they are released as submitted by the author.

Recommended citation

Parent, M., Ross, M., Howlett, D., and Bédard, K., 2021. 3-D model of the Quaternary sediments in the St. 
     Lawrence valley and adjacent regions, southern Quebec and eastern Ontario; Geological Survey of 
     Canada, Open File 8832, 1 .zip file. https://doi.org/10.4095/329082

System requirements

PC with 486 or greater processor, or Mac® with OS® X v. 10.2.2 or later; Adobe® Reader® v. 6.0 or later; video resolution of 1280 x 1024.

Trademarks

Adobe®, Acrobat®, and Reader® are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and/or other countries.

ESRI®, ArcExplorer™ and ArcReader™ are trademarks, registered trademarks, or service marks of ESRI® in the United States, the European Community, or certain other jurisdictions.

Contents

This report, prepared in collaboration with the Department of Earth and Environmental Sciences of the University of Waterloo, provides a first comprehensive compilation of the surface and subsurface distribution of Quaternary sediments in the St. Lawrence valley and adjacent regions. This compilation is the first step required to produce a mapped assessment of terrain parameters for dynamic response to seismic shaking in the St. Lawrence Valley. The thicknesses of simplified Quaternary units within the Ottawa and St. Lawrence Valleys will be integrated into a broader geohazard assessment platform (ER2, Nastev et al., 2015) used to assess casualties and damages to the built environment for a variety of seismic shaking scenarios. This 3D model of the St. Lawrence Valley will also be used for regional groundwater modelling and will be integrated in a Canada-wide 3D model of surficial geology.
In this report, a three-dimensional (3D) model is constructed to map the thicknesses of three simplified surficial sediment units. The resulting geological model is regional in scale, extending from the Ottawa Valley to the St. Lawrence Valley and with a cell resolution sufficiently small to allow detailed analyses. In the study area, there were a number of local surficial 3D models prepared for regional hydrogeological studies, most of them conducted under the supervision or co-supervision of the senior author. This report aims to incorporate these into a single continuous 3D model with the assistance of surficial geology maps, digital elevation models (DEM) and borehole data. 
The main objective of this report is to present the main results of this work: a simplified 3-layer regional-scale geological model of Quaternary units overlying bedrock in the St. Lawrence Valley and adjacent regions.

Directory structure

of_8832.pdf (report)
of_8832_reame.rtf (this file)
	\of_8832_Data
		lisez_moi.txt
		of_8832_SLL_Surficial_data_Metadata.txt
		readme.txt
		SLL_Quaternary_Deposits_3D.cpg
		SLL_Quaternary_deposits_3D.csv
		SLL_Quaternary_Deposits_3D.dbf
		SLL_Quaternary_Deposits_3D.prj
		SLL_Quaternary_Deposits_3D.sbn
		SLL_Quaternary_Deposits_3D.sbx
		SLL_Quaternary_Deposits_3D.shp
		SLL_Quaternary_Deposits_3D.shp.xml
		SLL_Quaternary_Deposits_3D.shx
		SLL_Quaternary_deposits_3D.txt
	
Author contact information

M. Parent (Michel.Parent@nrcan-rncan.gc.ca)
Geological Survey of Canada 
490, rue de la Couronne
Québec, Quebec 
G1K 9A9

Availability information

This publication is available for free download through GEOSCAN (https://geoscan.nrcan.gc.ca/).

Terms of use

Information contained in this publication or product may be reproduced, in part or in whole, and by any means, for personal or public non-commercial purposes, without charge or further permission, unless otherwise specified.
You are asked to:
•	exercise due diligence in ensuring the accuracy of the materials reproduced;
•	indicate the complete title of the materials reproduced, and the name of the author organization; and
•	indicate that the reproduction is a copy of an official work that is published by Natural Resources Canada (NRCan) and that the reproduction has not been produced in affiliation with, or with the endorsement of, NRCan.
Commercial reproduction and distribution is prohibited except with written permission from NRCan. For more information, contact NRCan at copyright-droitdauteur@nrcan-rncan.gc.ca.

Terms of use for data

View the licence agreement for data at http://open.canada.ca/en/open-government-licence-canada