Where on (Google) Earth #175?
posted in Geology, Google Earth, Where on (Google) Earth? |It’s been almost a month since I found EffJot’s WoGE #174, but I’ve been in a real blogging funk recently, so I’m only getting around to posting #175 today. Nonetheless, I’m determined to get this one posted before I leave for GSA (#GeoPort) and Earth Science Week comes to a close.
This one’s a beauty for the structural geologists out there – there’s a lot of folding & faulting visible. Of course, to win and host the next WoGE you’ll need to locate the imagery in Google Earth and comment on this post with its latitude and longitude and an explanation of the geology that’s visible, to the best of your ability to determine it. Good Luck!
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No Schott Rule. Just win baby!
Looking forward to seeing all the geobloggers and geotweeters in Portland!
This rifted dome is located at approximately Latitude 56 degree 22 min and Longitude 67 degree 50 min. This lies along the western edge of the New Quebec orogen and there are numerous uranium deposits associated with this region.
Dominion – my sincere apologies. Your comment got caught in my blog’s spam filter for reasons that aren’t entirely clear to me. You should have been credited with the correct answer two days ahead of Peter (though to Peter’s credit he had a much more detailed explanation of the geology). Since he’s already posted WoGE #176 and I won it, please allow me to offer you the opportunity to post WoGE #177, if you’d like to.
56.33N – 67.94W. The view is a snapshot of the New Quebec Orogen (also known as Labrador Trough) of northeastern Quebec and Labrador. It features the heavily folded Howse zone that is tectonically sandwiched between the Schefferville Zone in the southwest and the Laporte Terrane and Doublet Zone in the northwest. The New Quebec Orogen is a ~1000 km long Paleoproterozoic foreland fold-and-thrust belt that resulted ~1.8-1.9 Ga ago from the collision between the Archean Superior Province to the southwest and the mostly Archean Rae Province to the northeast. Here, the Howse Zone is dominated by upper units of the Knob Lake Group, consisting mostly of basalts, gabbros surrounded by metamorphosed sediments(mostly turbiditic shales, siltstone, and graywacke). Of particular interest is the Sokoman cherty iron formation (deposited on a subsiding shelf), one of the most extenisve iron deposits of the world.
Well done, Peter. I couldn’t have put it better myself – in fact, I probably couldn’t have put it as well myself. WoGE #176 is all yours.
WoGE#176 is up, enjoy!
I was quite surprised to see the photo of the Romanet Lake 56.277120N;-67.734034 (ie W) area of the Labrador Trough where I worked three summers in the 1960s. Two summers were with Eric Dimroth and I enjoyed learning some elements of mapping geological structures from him. The impressive patterns are indeed structures, gently folded flood basalt layers 100 to 200 metres thick. Romanet Lake is a fault bounded block dominated by sedimentary rocks, largely shale if I recall correctly. Otelnuk Lake is on the bottom edge and Chakonikapu on the SW corner, near where BIF is located. For scenics and exploration shots in that area check 1962.., 1963.. and 1965.. of my scanned slides at http://www.flickr.com/photos/corewhisperer/sets/