I'm sure this will have been posted before, however for those who've not seen it.... http://www.treehugger.com/natural-sciences/oregons-lost-lake-disappearing-through-mysterious-hole.html
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Mendip Rocks, Earth Science Lecture Day
Mendip Rocks are holding a number of presentations on Saturday 17th October as part of the Earth Science Week. Talks will include:-
Anjana Khatwa, award winning presenter and writer: "The Whispers of Rock: Stories from the Earth". Vince Simmonds, archeologist and cave explorer: "Echoes of the Ice Age: A Pleistocene Record from Mendip Cave Deposits" Of particular interest will be the recent find, the Woolly Rhino Skull that is now in Wells Museum. Owen Dukes - Geologist (Tarmac) "Mendip Mineral Resources"
Lost lake
- Thread starter Pegasus
- Start date
Ed W
Member
Pegasus,
It was posted yesterday under idle chat (http://ukcaving.com/board/index.php?topic=18332.0, but probably better off here.
Cheers,
Ed
It was posted yesterday under idle chat (http://ukcaving.com/board/index.php?topic=18332.0, but probably better off here.
Cheers,
Ed
Joe Duxbury
Active member
Ed,
Do you know if anyone has tried to divert the water (in the summer) and take a look at where the tube goes?
You've done it in the I?rafossar cave in Iceland, but maybe this one is too small. Which would explain why it's capable of filling up in winter.
Do you know if anyone has tried to divert the water (in the summer) and take a look at where the tube goes?
You've done it in the I?rafossar cave in Iceland, but maybe this one is too small. Which would explain why it's capable of filling up in winter.
Ed W
Member
Hi Joe,
Unfortunately I know as much as you about the tube in the article. In the case in Iceland the tube is fed through fissures in the lake bed, though there are also sinks in the bed of the river that drains the lake. In very wet conditions several of the caves around Laufbalavatn can become impassable. The tube could be any size, and it could also become choked with debris and silt or it could just lead to a lava seal and back up from there.
As I said in the other thread, this is not that uncommon, lava tubes quite often capture surface flow. The photo below shows a passage in Manjangul on Jeju Island (Republic of Korea), though the passage is dry in this shot, I am reliably informed that during Typhoons that the water level reaches the obvious line about 1m up the walls. Apparently the water is also shifting a bit too, not static. It would be quite a sight in those conditions.
Unfortunately I know as much as you about the tube in the article. In the case in Iceland the tube is fed through fissures in the lake bed, though there are also sinks in the bed of the river that drains the lake. In very wet conditions several of the caves around Laufbalavatn can become impassable. The tube could be any size, and it could also become choked with debris and silt or it could just lead to a lava seal and back up from there.
As I said in the other thread, this is not that uncommon, lava tubes quite often capture surface flow. The photo below shows a passage in Manjangul on Jeju Island (Republic of Korea), though the passage is dry in this shot, I am reliably informed that during Typhoons that the water level reaches the obvious line about 1m up the walls. Apparently the water is also shifting a bit too, not static. It would be quite a sight in those conditions.
Joe Duxbury
Active member
Here's a bit more:
https://www.facebook.com/permalink.php?story_fbid=10153274805128633&id=229362333632
I had hoped someone would take a look! Good for Brent!
https://www.facebook.com/permalink.php?story_fbid=10153274805128633&id=229362333632
I had hoped someone would take a look! Good for Brent!
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