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Geophysical field methods are generally non-invasive and environmentally friendly and can usually be completed relatively quickly with only a limited amount of field logistical support. Geophysical data may be correlated with surface bedrock outcrops, borehole information, borehole logs and other "ground truth" data to substantiate subsurface estimates. The use of geophysical data can substantially reduce quarry exploration and development costs that have traditionally been associated with large scale borehole or core drilling programs. Examples of geophysical surveys used for raw material reserve estimates, overburden quantification and quarry delineation are presented from a variety of industrial mineral extraction operations ranging from unconsolidated sand and gravel deposits to hard rock quarries.