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TitleSouthern Ontario "Golden Spike" data release: Nobleton borehole
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorLogan, C EORCID logo; Knight, R DORCID logo; Crow, H LORCID logo; Russell, H A JORCID logo; Sharpe, D RORCID logo; Pullan, S E; Hinton, M JORCID logo
SourceGeological Survey of Canada, Open File 5809, 2008, 29 pages; 1 CD-ROM, Open Access logo Open Access
LinksOak Ridges Moraine web site
LinksMoraine d'Oak Ridges, site web
PublisherNatural Resources Canada
Documentopen file
MediaCD-ROM; digital; on-line
File formatpdf
AreaNobleton; Laurentian Valley
Lat/Long WENS-80.0000 -79.5000 44.0000 43.7500
Subjectsstratigraphy; hydrogeology; geophysics; boreholes; geophysical logging; seismic surveys; seismic profiles; glacial deposits; tills; sands; gravels; hydrostratigraphic units; piezometric levels; grain size analysis; grain size analyses; organic carbon; sedimentary rocks; limestones; groundwater; groundwater geochemistry; groundwater regimes; groundwater surveys; groundwater levels; Oak Ridges Moraine; Halton Till; Newmarket Till; Lindsay Formation; Don Formation; Thorncliffe Formation; Sunnybrook Formation; Scarborough Formation; Alliston Aquifer; Quaternary; Cenozoic; Paleozoic
Illustrationsstratigraphic sections; profiles; sketch maps; tables; photographs
Released2008 04 01
AbstractThe Nobleton continuously-cored borehole (Golden Spike) is situated on the southern flank of the Oak Ridges Moraine (ORM) 4.25 km north of Nobleton, Ontario. It was drilled in 1996 as part of the Oak Ridges Moraine Hydrogeology Study of the Geological Survey of Canada. The Nobleton borehole, with a core length of 193 m, is one of the deepest hydro-stratigraphic reference sites in the region. The location was selected to provide subsurface ground truthing for a 7 km long seismic profile completed across a broad bedrock depression known as the Laurentian valley. Detailed sedimentological core logging is complemented by downhole geophysics, grain size analysis, total organic carbon analysis, and nested piezometer installation. The base of the borehole intercepts limestone of the Paleozoic Lindsay Formation. Overlying Quaternary deposits interpreted to be Don, Scarborough, Sunnybrook and Thorncliffe formations, referred to as Lower sediment, are overlain by Oak Ridges Moraine sediment and Halton Till. Of particular note is the large number of rhythmites documented in the Scarborough (500) and Thorncliffe (1000) formations and the distinct geophysical signatures associated with these rhythmites. In contrast to the relatively fine grained rhythmic character of these deeper formations is a basal 20 m thick gravel unit and overlying sandier ORM deposits. The Nobleton golden spike borehole provides new hydrogeological insight on Lower sediment (Alliston Aquifer), tunnel channel fills that may host significant aquifer potential, and Oak Ridges Moraine sediment that is an important aquifer for domestic water supply.

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