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Posts Tagged ‘cave in Canada’

IMGP3595, originally uploaded by Mic2006.

JC and I recently visited a cave in solid marble (The Natural Marble Bridge). Our intention had been to follow up river a short distance to see if there were other caves in the area. You might know the old adage – were there is some caves, there are more. Sadly there were no more that we found, but JC found a hole in another nearby valley that was blowing cold air and about 100 meters away, a hole (on the opposite side of the marble bridge) where it looks like the stream that presently runs through the cave must have sunk at one time. A cave dig might be in order when we run out of other going options.

The Natural Marble bridge has an entrance at one side of an elevated ridge of marble, and a downstream exit on the other side of the ridge. The entry way looks quite ominous and the roar of water is impressive – well out of proportion to the quantity that sinks.

Your passage through the cave is quite magical – traversing through bands of marble of various earthy colors, a granite contact being some short distance into the rock (facing downstream to your right).

See video of the natural Marble Bridge here.

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Descending a pit is a somewhat awe inspiring experience, especially if that pit has never been descended before. This particular area of Ontario is absolutely pocked with holes and solution shafts through the rock and this past weekend we found another cluster somewhere near the cave that we call the Death Bell.

See video on the descent of the pit – here

When I got to the bottom of the pit I discovered that I was standing on a boulder choke and beneath that choke you could see a shaft that dropped down at least another 30 or 40 feet. Any dig of the boulder choke would have to be done very carefully as there is the hazard of engulfment where the floor could collapse away and you would find yourself tumbling down amongst hundreds of tons of rock. Bottom line – diggers would have to be roped off.

The size of this shaft is out of all proportion to the water that presently drains into it so I would imagine that it is a relic from the glacial past – in fact the clusters of shafts in the area are generally aligned along some prominent joint and there is little that would explain why they had formed there. Without surface wear marks that would suggest a river that had drained into the shaft the only other thought that I am having is that the shafts formed beneath a glacier with an enormous pressure head that injected water deep along the bedding planes – kind of similar to the formative process of Museum or Leopard Frog Cave.

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