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As the glaciers retreated they left behind considerable rock, sand and gravel residue called till.  Ablation till was carried near the surface of the glacier and basal till was carried at the base of the glacier and subject to enormous pressures.  In places where this glacial till was left behind it formed a layer of overburden on top of the granite bedrock. Basal till is very dense, strong and non-porous so it resists water flow.

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Local well drilling reports often refer to the material in first few metres of drilling as “overburden”….this can be a thin veneer of geological sediments and modern organic material.  In some locations glacial till will be present immediately over top of the bedrock. In 32 of the 79 well records, bedrock was encountered within one meter of the surface. In other locations the overburden was much thicker.

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We can see this glacial till exposed today in many places around Hotel Lake and  North Pender.