Contest #541: Don Juan Pond, Wright Valley, Antarctica

DonJuanSTILL.0660 web.jpg

Don Juan Pond should maybe not be called a “pond” since at its deepest it hits a whopping 11cm or 4″. Also, because of the proclivity of the water from the “pond” to disappear into the depressions of nearby boulders (as you can see in this GigaPan picure)

It has 44% salinity by weight, which is 18 times saltier than the ocean and even at least 30% saltier than the Dead Sea and Lake Assal. In fact, it is so hypersaline that it never freezes — the only body of water on the continent that can claim that.

Don Juan Pond is a fairly new discovery, found by George Meyer in 1961 and named after his helicopter pilots Lt. Don Roe and Lt. John Hickey. In 1965, a pair of Japanese scientists, Tetsuya Torii and Joyo Ossaka, discovered a previously unseen form of calcium chloride (hexahydrate) with a unique crystalline structure. This mineral has taken on the name of Antarcticite.

Those who braved the cold and found this place included:

  • Glenmorren
  • hhgygy
  • Phil Ower
  • Garfield
  • Lighthouse
  • Chris Nason
  • Eloy Cano
  • Mehmet DURMUS

And after the hint:

  • Gillian B
  • ashwini agrawal
  • donaaronio
  • gscrp
  • Farceur
  • Jesus Rodriguez

Contest #540 – Alisa Craig, Firth of Clyde, Scotland

Curling stones certified by the World Curling Federation are granite mined from one of 2 locations on the planet. About 40% of stones come from the Treyfor Granite Quarry in Wales, and this big rock off the Ayrshire coast of Scotland accounts for the rest.

Ailsa Craig from the southeast
By August SchwerdfegerOwn work, CC BY 4.0, Link

Curling stones from Alisa Craig are prized for the Blue Hone granite, which has almost no water absorption.

Those who got into the house this end included:

  • Eloy Cano
  • Lighthouse
  • Rob de Wolff
  • hhgygy
  • Walter_V_R
  • mehmet durmus
  • Garfield
  • Phil Ower
  • donaaronio

And after the hint:

  • Luís Filipe Miguel
  • Newagincourt
  • LawnBoy
  • Chris Nason
  • Glenmorren
  • Jeather
  • BenF

Which brings to a close yet another series. Congratulations to Lighthouse, hhgygy, and Garfield for perfect scores!