Glacitectonic Caves in the St. Lawrence Lowlands of Québec

Even though glacitectonic features have been identified in the MontréalMontréal area since the 1960s, it is only more recently that their extent and characteristics have been analyzed in greater detail. Exploration and studies have revealed that glacitectonic cavesCaves , hundreds of meters long, formed in platform limestones. Two different cases study are briefly discussed: the St-Léonard cavesSt. Leonard Cave on Montréal Island and the Beauport cavesBeauport Caves near QuébecQuébec CityQuébec City . These studies confirm that the weight and displacement of active glaciersGlaciers can have disturbing effects, including dislocation, folding or stress redistribution, on the underlying bedrock, extending at least a few tens of meters deep.