15,000-year-old giant cave found beneath Canadian city
Monday, December 4, 2017, 14:38 - A massive 15,000-year-old cave has been discovered buried beneath a Canadian city.
Found by explorers Luc Le Blanc and Daniel Caron, the newly found underground passage is connected to Montreal's Saint-Leonard’s cavern, which is under Parc Pie XII.
The original cavern has been opened to visitors since 1815. However, the new section, which measures about 200 metres long and six metres high, was recently found behind a limestone wall, according to CBC News.
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Cavers Luc Le Blanc and his friend Daniel Caron inside the cave -- Submitted by Société québécoise de spéléologie via CBC
"This is a major discovery we made," Le Blanc told the news agency. "This doesn't happen many times in a lifetime."
The duo had to use an inflatable canoe to travel through part of the passage as it contained five-metre-deep groundwater, CBC News reports.
"It keeps going. We haven't reached the end yet," Le Blanc told the news agency.
The pair had been searching for a new part of the cavern for years. They were just about to give up when they managed to create a hole in October.
"We started digging in a decomposed layer of limestone that was much softer... We managed to open up a window through which we could see the void beyond," Le Blanc told CBC.
The new section was created through the process of glacial tectonism, according to the explorer.
"The walls opened through the pressure of the glacier above... it's a mechanical process through a glacier."
The city hopes to one day open the new passageway to the public.