00000nam 2200000za 4500 9.859087 CaOODSP 20251031142448 cr ||||||||||| 180713s2018 oncabd ob f000 0 eng d CaOODSP eng n-cn-qu M183-2/8360E-PDF Brooks, Gregory Robert, 1958- Thickness records of glacial Lake Ojibway varves from Duparquet and Dufresnoy lakes, northwestern Quebec [electronic resource] / G.R. Brooks. [Ottawa] : Natural Resources Canada, 2018. 15 p. : chart, col. ill., maps + 2 appendices. Open file ; 8360 This record only includes the Open File in PDF. The complete data set with all the files in various formats is available for free download at http://geoscan.nrcan.gc.ca/. Includes bibliographical references. "The thicknesses of 537 and 387 rhythmic couplets were measured along composite sequences of glacial Lake Ojibway glaciolacustrine deposits recovered in cores from Duparquet and Dufresnoy lakes, Quebec, respectively. The couplets span varve numbers 1137 to 1742 (Lac Duparquet) and 1189 to 1625 (Lac Dufresnoy) with respect to the Timiskaming varve series. Erosional unconformities (or disconformities) below v1484 cause 51 and 47 varves to be ‘missing’ in both the Duparquet and Dufresnoy varve records, respectively. Error in the varve numbering relative to the Timiskaming varve series is estimated to be ±2 varves. Varve thickness data for each lake are listed in separate digital spreadsheet files (.xlsx and .csv formats). Mosaic posters depict CT-Scanner radiograph images of each set of lake cores and show the interpreted varve numbering and the between-coring-site correlations of the varve couplets"--Abstract. Varves Québec (Province) Measurement Canada. Natural Resources Canada. Geological Survey of Canada. Open file (Geological Survey of Canada) 8360. (CaOODSP)9.506878 PDF 851 KB https://publications.gc.ca/collections/collection_2018/rncan-nrcan/m183-2/M183-2-8360-eng.pdf Open file PDF 33.91 MB https://publications.gc.ca/collections/collection_2018/rncan-nrcan/m183-2/M183-2-8360-1-eng.pdf Appendix A PDF 30.35 MB https://publications.gc.ca/collections/collection_2018/rncan-nrcan/m183-2/M183-2-8360-2-eng.pdf Appendix B HTML N/A https://doi.org/10.4095/306623 GEOSCAN DOI 306623