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Supporting Member
Join Date: Mar 2012
Location: Vancouver, BC, Canada
Posts: 322
Thanks: 232
Thanked 49 Times in 22 Posts
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Wet Dream
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#4 (permalink) |
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New Member
Join Date: Mar 2012
Location: New Zealand
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Very nice indeed.
What is the cause of the "scalloping" in the rock? Is it scouring from particles in the water? I am hoping to spend a year on Vancouver Island in the near future. Looks like a beautiful spot. |
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#5 (permalink) |
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Supporting Member
Join Date: Mar 2012
Location: Vancouver, BC, Canada
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Very nice indeed. The "scalloping" is a standard feature in caves. In a dry cave one can determine the direction of the water flow by observing which side is steeper, that is the side from which the water flows. Large scallops are said to be caused by slower flowing water and smaller by high flow. This cave is likley to have very high flow in the winter months. It is not uncommon to to have two inches or more of rain in this area in a day.What is the cause of the "scalloping" in the rock? Is it scouring from particles in the water? I am hoping to spend a year on Vancouver Island in the near future. Looks like a beautiful spot. Look me up if you are comming up here. I would be pleased to show you around. Peter |
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#7 (permalink) |
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Join Date: Aug 2012
Location: New Zealand
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The "scalloping" is a standard feature in caves. In a dry cave one can determine the direction of the water flow by observing which side is steeper, that is the side from which the water flows. Large scallops are said to be caused by slower flowing water and smaller by high flow. This cave is likley to have very high flow in the winter months. It is not uncommon to to have two inches or more of rain in this area in a day. Am I right in the belief that the boulders around the entrance were pushed there by the flow and the skip effect of these boulders in a high flow has caused the scalloping? The phenomenon is very well featured in that cave system - it looks like railway tracks.Look me up if you are comming up here. I would be pleased to show you around. Peter Great video and awesome exploration - looks like you guys have a few more adventures yet in that system! |
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#8 (permalink) |
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Supporting Member
Join Date: Mar 2012
Location: Vancouver, BC, Canada
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Am I right in the belief that the boulders around the entrance were pushed there by the flow and the skip effect of these boulders in a high flow has caused the scalloping? The phenomenon is very well featured in that cave system - it looks like railway tracks. I expect you are correct as to how the boulders got around the entrance.Great video and awesome exploration - looks like you guys have a few more adventures yet in that system! Not so sure about the cause of scalloping however. There are marks in any active cave from crashing rocks. I am inclined to think that the scallops are formed by water. Sure there is particulate matter, and rocks, but just the mildly acidic water over time is what forms caves. Water and time, a lot of time. Peter |
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#9 (permalink) |
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Join Date: Mar 2012
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Beautiful stuff, Peter. Jitka wants to pack our cave gear!
Very interesting formations, some world class stuff. We don't usually think of that area first when we think of cave diving. Water temperatures? Interesting doing cave work with dry gloves. Best, Dave . |
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#10 (permalink) |
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Join Date: Mar 2012
Location: Vancouver, BC, Canada
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Beautiful stuff, Peter. Jitka wants to pack our cave gear! The water in this cave is the warmest of any I have been in up here. 50 F. Usually the temp is in the low 40's.Very interesting formations, some world class stuff. We don't usually think of that area first when we think of cave diving. Water temperatures? Interesting doing cave work with dry gloves. Best, Dave . We have over two thousand caves surveyed on the island. Many are large and properly decorated with all sorts of spelothems. I am more of a caver than a diver but have poking about in sumps since 1988. Although we have some significant water filled features, most of our dives are in small sumps that require a huge amount of effort to get to. This one is the exception. Although you would not know it from all the grunting and moaning the real cave divers did, it is the easiest and shortest aproach of any cave dive here. Sadly it is closed for most of the year as the rageing water of the river it is under prevents entry exept in late summer. Peter |
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