The Geological Survey of Canada owns and operates slim hole geophysical sondes and recording equipment for use in PVC cased boreholes in unconsolidated overburden. Such holes are commonly drilled and cased for overburden stratigraphic or geotechnical studies related to on-going GSC projects. These boreholes have been located in various parts of Canada and in a variety of differing material types, including glacial, fluvial and lacustrine deposits. Most (but not all) sediments are of Quaternary age. The compilation is offered as a guide to the geophysical response of overburden materials for users planning geophysical surveys in a particular area, and also as a teaching resource for near-surface applied geophysical education programs.