Publication information

Geological Survey of Canada
Open File 8089

A varve record of Lake Ojibway glaciolacustrine deposits from Lac Dasserat, northwestern Quebec, Canada

Brooks, G.R.

© Her Majesty the Queen in Right of Canada, as represented by the Minister of Natural Resources Canada, 2016

doi:10.4095/299013

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

View the licence agreement at http://data.gc.ca/eng/open-government-licence-canada

Recommended citation

Brooks, G.R., 2016. A varve record of Lake Ojibway glaciolacustrine deposits from Lac Dasserat, northwestern Quebec, Canada; Geological Survey of Canada, Open File 8089, 1 .zip file. doi:10.4095/299013

Contents

Cores recovered from six sites within a study area at Lac Dasserat, northwestern Quebec, contained varved Lake Ojibway glaciolacustrine deposits.  Measurements of the thicknesses of 546 couplets follow a composite sequence of varves through the recovered deposits.  The couplets are interpreted to span varve numbers 1039 to 1637 with respect to the regional Timiskaming varve series.  There is a gap of 48 varves in the varve record, representing an apparent erosional unconformity under the submarine landslide deposits of event horizon E.  There are also two short gaps of unmeasured varves between varves 1266-1267 and 1051-1053.  The ‘Dasserat varve record’ represents about 75% of the varve sequence preserved within the Lac Dasserat basin.  

Directory structure

Readme.rtf
of-8089.pdf
of-8089.pdf_Appendix A – One folder containing a poster-sized, pdf version of Fig. 3 in the report.  This figure depicts the radiograph images of the cored arranged vertically in relative stratigraphic position under each of the respective six core headings.  
of-8089.pdf_Appendix B – One folder containing varve thickness and varve number data for the Dasserat varve series in .csv and .xlsx spreadsheet formats.

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

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.

Author contact information

greg.brooks@canada.ca
Greg Brooks
Geological Survey of Canada
601 Booth Street
Ottawa, Ontario
Canada
K1A 0E8

Availability information

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