Thursday, 11 July, 8:00 a.m. (GMT + 0:00)
Well, after 50+ unsuccessful attempts, 2 in a row:)
After considering astronomical observation sites (which proved wrong) I looked around, in volcanic areas, and had some luck in finding the (Patagonian) Auca Mahuida and its oil fields.
For this new challenge you should find out where is, their geology and, in this case, another important detail (but not decisive for the win).
Here it is:
No Schott's Rule this time!
Rules, tips and previous WoGEs are collected by Felix on his blog and a KML file is available with all WoGEs.