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TitleDownhole geophysical logs in Quaternary sediments of the Niagara Peninsula, southern Ontario
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorCrow, H LORCID logo; Olson, L C; Burt, A K; Brewer, K D
SourceGeological Survey of Canada, Open File 8252, 2017, 32 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatreadme
File formatpdf; rtf; las
NTS30L/13; 30L/14; 30M/03; 30M/04; 30M/05; 30M/06
AreaNiagara Peninsula; Niagara Escarpment
Lat/Long WENS -80.0000 -79.0000 43.3333 42.7500
Subjectssurficial geology/geomorphology; hydrogeology; stratigraphy; regional geology; geophysics; groundwater; groundwater resources; resource management; aquifers; lithology; grain size distribution; hydrostratigraphic units; boreholes; geophysical logging; gamma ray logging; electromagnetic induction; conductivity; magnetic susceptibility; seismic velocities; groundwater temperatures; groundwater movement; groundwater flow; well logging; observation wells; geophysical interpretations; glacial deposits; glacial landforms; tills; drift deposits; ice contact deposits; glaciofluvial deposits; glaciolacustrine deposits; eskers; postglacial deposits; muds; silts; clays; sands; gravels; boulders; heavy minerals; provenance; bedrock geology; bedrock topography; buried valleys; sedimentary rocks; shales; dolostones; gypsum; limestones; basins; Whittlesey Aquitard; Whittlesey Aquifer; Halton Aquifer; Halton Aquitard; Regressive Aquifer; Wentworth Till; Port Stanley Tills; Catfish Creek Till; Halton Till; Erigan bedrock channel; Chippewa bedrock channel; Crystal Beach bedrock channel; Queenston Formation; Gasport Formation; Guelph Formation; Salina Group; Phanerozoic; Cenozoic; Quaternary; Paleozoic; Devonian; Silurian; Ordovician
Illustrationslocation maps; geoscientific sketch maps; tables; geophysical logs; lithologic sections; profiles; photographs
ProgramGroundwater Geoscience Aquifer Assessment & support to mapping
Released2017 07 17
Summary(Plain Language Summary, not published)
In 2013, the Ontario Geological Survey (OGS) initiated a three-dimensional mapping project in the Niagara Peninsula to model regional-scale Quaternary sediments which form both aquitards and aquifers. The Geological Survey of Canada (GSC) is collaborating with the OGS in the study area by conducting downhole geophysical logging in 15 PVC-cased sediment boreholes to better understand the in situ physical and chemical properties of the sediments. A suite of natural gamma and induction (apparent conductivity and magnetic susceptibility) and velocity (Vp, Vs) logs was acquired to investigate lithological variation within the sediments. Logs are interpreted alongside particle size analyses from the cores. High resolution fluid temperature logs were recorded to identify small temperature changes within the borehole fluids, and identify regional groundwater temperature variation. This Open File report summarizes provides some preliminary log observations in the context of the regional hydrostratigraphic units. Figures of the log suites and digital log data are provided in appendices.

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