fredag 13. juni 2014

WoGE #449

Yet again I solved one of Luis' WoGEs.

Extremely high relief, little large-scale lithological variation and especially no consistent sedimentary structures, together with very variable resistance to erosion led me to look for an extinct volcanic island - I had my summer vacation on La Gomera a few years ago, and that is a typical example. This time it was Madeira, which is definitely on my holiday list. ;)

This place however is NOT on that list:

This one should be easy, so I invoke the Schott Rule.

For any new players to Where on (Google) Earth, simply post a comment with latitude and longitude and write something about the (geologic/geographic/hydrographic) feature in the picture. If you win, you get to host the next one. Previous WoGEs are collected by Felix on his blog and a KML file.

6 kommentarer:

  1. Addendum for Schott Rule: Published Jun 13th, 07:33 UTC

  2. Hint #1: This is on an island.

  3. 71°06′05.61N 179°13'32.19′W - Wrangel Island, Chukotka Autonomous Okrug, Russian Federation!

    Wrangel Island consists of folded, faulted, and metamorphosed volcanic, intrusive, and sedimentary rocks ranging in age from Upper Precambrian to Lower Mesozoic, (source) and is one of the onshore exposures of the Wrangel Arch, a (more, than 500 km) ~ E-W trending offshore basement high, separating the well-known shelf depressions: North and South Chukchi (Hope) sedimentary basins, filled by more than 16-18 km of Late Paleozoic(?)-Tertiary and up to 5-6 km of Aptian(?)-Tertiary sequences, respectively(source)

    Miller, E. L.; Dumitru, T. A.; Seward, G. mention that Wrangel Island was interpreted to represent a north-vergent Mesozoic to Tertiary fold and thrust belt traced offshore by seismic reflection to the Herald Arch and then to the Lisburne Hills and the Brooks Range foreland fold and thrust belt.

    I couldn't find the specifics of the mountains highlighted by your spot, but the island, in general opinions, is very important not only for geologists as to biologists and for the "gold (I mean, oil) diggers"! While searching for the geology I found this spectacular biogeo-picture (polar bear / triassic turbidites)!

    And Ole, when I saw your WoGE, I thought "Norway"! Well, ... I was right about the latitude (by the north cape, I mean) :)

  4. Correct! You can find a paper on the geology here:
    You have to scroll to the bottom to download the pdf, but it is interesting! The reason I chose this mountain is that it's the contact between the Precambrian volcanics and the younger sediments, so it forms an easily identifiable spot.

    And the reason I chose Wrangel island is something that is not quite geology: This remote Arctic island is believed to be the final place on Earth to support woolly mammoths as an isolated population until their extinction about 2000 BC, making them the most recent surviving population known to science. So not really fossils. :)

  5. Tomorrow, around 12:00 (GMT) I should have the next one!

    1. Sorry, I forgot to post here the link! It's here:
      However, Felix already realized it and tweeted the link.