Posts Tagged ‘sinkhole in Ontario’

possible cave bearing sinkhole, originally uploaded by Mic2006.

It seems that the cave geography repeats itself. To a farmer it is a curse but to me this sinkhole is very much like the Blue Barrel Sink and as you might already be aware, there is cave tunnel beneath Blue Barrel sink. and again, just like blue Barrel sink there is the surface depression that connects to the nearest sinkhole in the patch of trees in the distance.

Ontario’s karst geography is screaming “CAVE” and so few can hear the noise. Put your ear down in the bottom of this sink at springtime, when the snow is melting and if you can hear the same roar that JC and I heard from the river beneath Blue Barrel, well then you know to dig and you’ll open up a cave. This whole are is pocked with sinkholes, but most are taking surface streams.

This steep sided cone-shaped sinkhole seems indicative of soil being eroded from beneath. If you are searching for caves in Ontario, this is a very good indicator that there is a tunnel below. I think that those larger tear drop sinks that take small streams are seldom home to larger tunnels, but where the tunnels all meet up underground in a single trunk passage, that is the real prize. Without apparent surface flow, these dimples in the field are likely to be your most profitable use of time – they are eating soil because there is water flowing beneath.

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IMG_8705, originally uploaded by Mic2006.

JC, GW and I returned to this karstic area to make an attempt on this pit. This is but one sinkhole of many in this area – over 50 mapped nearby, all overlying a buried karst that likely hides caves that we would very much like to find.

We have taken a short break from Wasteland Waterway as it can get quite intense if you do it every weekend. Instead we thought to involve ourselves in something a little less serious – the C… sink was exactly what we needed. It was a sinkhole that had been dye traced by a local university, but inexplicably, with such a perfect pit, they never had the curiosity to descend it.

We carried our ladder for around a half hour through tangled, bush, nettles and along the edge of a corn field until we reached our destination.

At the end of a narrow, steep sided gulley we followed a barely flowing stream as it dribbled over a ledge for a free fall into the underground.

Down below the water pattered down upon us like a cloud-burst, we were soaked in seconds, but we stayed to clear debris from the mouth of a small triangular shaped tunnel. As GW points out, with a little persuasion we will be able to remove the boulder that blocks our way and then we’ve got a going cave dig.

We now have the luxury of one promising cave dig and 2 caves with virgin passage known only to myself, JC and soon to be Greg and Marcus.  For Ontario that really is quite remarkable and it becomes increasingly apparent that the karst is there and if you know what to look for, the tunnels soon make themselves apparent.

A short break next week as I’m off to the Bancroft Gemboree – I never miss it. I hear the CGA is there so I’ll stop by to touch base with old collegues. Gems are another of my interests.

Still working hard at getting the next cave book out – it’s looking good. If you are cave-interested, especially in Ontario caves, geology or geography I’m sure you’ll appreciate what I’ll have to offer – again discretion with locations, but like opening a treasure box if you’re a cave searcher you will be totally energised by what you hear and see.

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