Chileens meer verdwenen
 

Ik hoorde hem vandaag, en vond hem vrij apart dus vandaar dat ik hem even post.

Chili in de ban van mysterieus verdwenen meer
De Chilenen breken zich het hoofd over een nat mysterie. In het zuiden van het land is plotsklaps een meer verdwenen.

Buenos Aires, 22 juni. Eind maart is het voor het laatst gezien en 27 mei was het definitief foetsie. Het 10 à 20 hectare grote meer ‘Lago Témpanos’ in het zuiden van Chili is verdwenen.

Waar tot voor kort helblauw water diende als een drinkbak voor het zeldzame Andeshert is nu een enorme, soms 35 meter diepe kuil te zien. In de zompige bodem herinneren alleen nog enkele ijsschotsen (témpanos, in het Spaans) aan de natte tijden van weleer.

In Chili gaat het even alleen nog maar over het natte mysterie: het meer is zoek. Deskundigen breken zich het hoofd hoe het mogelijk is dat vrijwel van de een op de andere dag een frisgrote plas de benen heeft genomen.

En niet alleen het meer maar ook de rivier die in het meer ontstond, is niet meer. Een soms wel 40 meter brede, waterrijke stroom die zich over acht kilometer uitstrekte, is nu veranderd in een droefgeestig beekje, aldus de regionale directeur bosbeheer Juan José Romero.

(...) (Hele artikel te vinden op http://www.nrc.nl/buitenland/article...verdwenen_meer

Eh?

en de stelling is??

Haha... ik zit ook even goed te lezen, en je hebt gelijk. Er staat hier niet dat het binnen één dag is gebeurd, op deze site stond dat echter wel zo beschreven. Hoe dan ook, het blijft een beetje vreemd, toch?

"Ben jij weleens iets kwijtgeraakt? :p"

Last time I checked was dit ook een achtergronden forum, dus ik zie niet zo in waarom hier een stelling aan verbonden moet worden. Het zou interessant kunnen zijn om te beredeneren hoe zoiets kan gebeuren.

Scheur in de aarde met een grote spelonk er onder misschien.

=> wetenschapsforum plaatsen :o

Mededelingen kunnen bij het Tiswah-topic

Dat is geen stelling, maar een vraag. ;)

Waarsscjinlijk aliens.

Van de 1 op de andere dag is natuurlijk een uitdrukking, maar komt verkeerd over in dit artikel. Foei NRC!

Dit viel mij op in dit artikel van de BBC:

Lake disappears suddenly in Chile

Scientists in Chile are investigating the sudden disappearance of a glacial lake in the south of the country.

When park rangers patrolled the area in the Magallanes region in March, the two-hectare (five-acre) lake was its normal size, officials say.

But last month they found a huge dry crater and several stranded chunks of ice that used to float on the water.

One theory is that an earthquake opened up a fissure in the ground, allowing the lake's water to drain through.

"In March we patrolled the area and everything was normal," said Juan Jose Romero from Chile's National Forestry Corporation, Conaf.

"We went again in May and to our surprise we found that the lake had completely disappeared. All that was left were chunks of ice and an enormous fissure."

Geologists and other experts are being sent to the area, which is some 2,000km (1,250 miles) south of the capital, Santiago, to investigate.

The region is shaken by frequent earth tremors and one idea is that a strong quake which hit the neighbouring region of Aysen in April opened up the fissure in the bottom of the lake.

A glacier specialist, Andres Rivera, told Chilean newspaper La Tercera that the lake's disappearance seemed to be part of the continual reforming of the landscape.

The Magallanes area "has seen interesting changes in the last few decades," he said, noting that the lake itself had not been there 30 years ago.

http://news.bbc.co.uk/nol/shared/spl...0703/img/1.jpg
(The lake, in the Magallanes region of southern Chile, was fed by a glacier (left) but had radically changed by the time researchers visited it in May.)

http://www.news.com.au/common/imaged...5536034,00.jpg
(Dry as a bone ... officials in southern Chile are trying to work out where all the water went from a large lake)

Trouwens, hier wordt een mogelijke andere verklaring gegeven dat in mijn ogen nog de meest waarschijnlijke is (omdat het meer er 30 jaar geleden nog niet was):


Chile probes missing lake

From correspondents in Santiago

June 22, 2007 10:02am
Article from: Agence France-Presse

OFFICIALS are trying to solve the mysterious disappearance of a large lake in southern Chile after recently discovering a 30m-deep crater instead of the body of water.

The National Forests Corp. of Chile (CONAF) has asked geologists to investigate what may have caused the unnamed lake to dry up after CONAF officials were stunned to find the empty hole during a routine visit on May 27.

Cracks were found inside the hole while ice floes that once floated over water just stood at the bottom of the empty lake at the Bernardo O'Higgins National Park 2000km south of Santiago, officials said.

"They were very surprised to see that the lake had disappeared,'' CONAF regional director Juan Jose Romero told Radio Cooperativa.

"We're not talking about a small lake. It was quite large.''

"The ice floes were there, but standing at the dry bottom of the lake, which disappeared almost overnight,'' he said.

Geologists and other experts were to determine the cause of the lake's disappearance, which also led to a dramatic drop in the water level of a river it fed.

As a possible explanation for the disappearance, geologists said ice flows damming up the lake's natural outlet could have given way under the pressure of accumulating lake water.

"It's a frequent event in Patagonia, only it's very seldom witnessed due to the low population density of the region,'' said Andres Rivera, glacier expert with the Scientific Research Centre of Valdivia, in southern Chile.

Patagonia is a vast region shared by Argentina and Chile comprising the Andes mountains to the west and south and plateaux and low plains to the east.

'It's a local phenomenon and not at all unusual,'' said Mr Rivera.

"It takes place in a very dynamic area, where these lakes form and eventually drain through the mechanics of ice."

University of Chile geologist Carlos Palacios said the missing lake likely emptied after water pressure broke through a "curtain or wall'' of ice and rocks at the basin's outlet.

"The problem is the resistance of the ice within the wall against the pressure of the water trapped in the basin. If the curtain ice is weakend through a melting process, the pressure finally wins out and the curtain breaks apart,'' Mr Palacios said.

"The outcome is a sudden, violent torrent ... and the consequential rapid drainage and disappearance of the lake,'' he said.

Other hypothesis about the disappearance included an earthquake-caused crack in the ground that could have drained all the lake water. Two months ago, a strong earthwake shook the Aysen Fjord, a few hundred kilometers from the lake.

Mr Palacios was doubtful. "These phenomena, in general, are not triggered by earthquakes ... although it may have accelerated a process that probably would have happened sooner or later.''
http://www.news.com.au/story/0,23599...3-1702,00.html

Zoek en gij zult vinden?

Sinkholes? http://en.wikipedia.org/wiki/Lake_Jackson_(Tallahassee,_Florida)