Cadillac Esker

The named esker is in the Cadillac area of Abitibi-Témiscamingue, Quebec, within the regional territory managed by the MRC de la Vallée-de-l'Or. A local committee document identifies an approximately 30-hectare Cadillac esker area linked to groundwater protection. [MRC de la Vallée-de-l'Or](https://mrcvo.qc.ca/territoire/comite-esker/)

An esker is a ridge of sand and gravel deposited by meltwater flowing through or beneath a glacier, then left behind when the ice retreats. Quebec's geology service describes eskers as fluvioglacial landforms that can run from a few hundred metres to several hundred kilometres. [Geologie Quebec](https://gq.mines.gouv.qc.ca/quaternaire_en/eskers_en/)

The porous sand and gravel can store and transmit groundwater, which is why Quebec treats eskers as important granular aquifers. The MRC record includes the Cadillac esker among areas whose groundwater protection is tied to human consumption, but a site-specific water test is still needed for any well. [MRC de la Vallée-de-l'Or](https://mrcvo.qc.ca/territoire/comite-esker/)

Esker sand and gravel can be useful construction aggregate, and Quebec's geology service identifies aggregate as one common use of eskers. Extraction must be weighed against the aquifer function because removing or exposing the material can affect groundwater protection. [Geologie Quebec](https://gq.mines.gouv.qc.ca/quaternaire_en/eskers_en/)