00000nam 2200000za 4500 9.581534 CaOODSP 20251031142446 cr ||||||||||| 150406s2014 onc|||||o f|0| 0 eng d CaOODSP eng n-cn--- M183-2/7628E-PDF Hamblin, Anthony P. The hydrogeological characteristics of the Upper Cretaceous De Courcy Formation (Nanaimo Group), from a subsurface core, groundwater observation well, Cedar, British Columbia [electronic resource] / [by] A.P. Hambin and T. McCartney. Ottawa : Natural Resources Canada, 2014. [30] p. coloured figs., figs., graphs, photos. Open file (Geological Survey of Canada) ; 7628 Inlcudes bibliographic references. As part of the investigation of the groundwater potential of the Nanaimo Group bedrock units, a drill core 112.5 m long was obtained from an Observation Well near the village of Cedar on Vancouver Island. The entire length of the core comprises the sandstone-dominated (potential aquifer zone) De Courcy Formation, and is characterized by thick bedded, medium to coarse grained sandstone (65% of core) with interbedded units of sandy siltstone. Sandstones have decent porosity and permeability and may form subsurface aquifers, whereas siltstones have lesser porosity and permeability and may form intervening barriers to groundwater flow. More importantly, the characteristics displayed in this core provide analogies for deeper and more widespread potential aquifer zones within the Nanaimo Group (Comox, Extension, Protection formations), for which we have no subsurface data. gccst Groundwater gccst Sedimentary rocks gccst Hydrogeology Canada. Natural Resources Canada. Geological Survey of Canada. Open file (Geological Survey of Canada) 7628 (CaOODSP)9.506878 PDF 1.09 MB https://publications.gc.ca/collections/collection_2015/rncan-nrcan/M183-2-7628-eng.pdf