I think (and hope!) this geo-challenge will be easier than the last one, which featured the escarpment side of Comb Ridge. The dip-slope side, with outcrops of Navajo sandstone, is the more familiar view. More explanation here.
☞UPDATE:
Readers got it: 1) west flank of Raplee Ridge, a small anticline – crossed by the San Juan River; and 2) incised meander at Goosenecks State Park – cut by the San Juan River. Both are in southeast Utah.
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The upper one appears to be Comb Ridge, where the San Juan River has cut a water gap,and the lower one (which should be a dead give-away to most US geo types) is Goosenecks State Park, where the San Juan River has cut an exquisite series of incised meanders.
ReplyDeleteTwo out of three, and the third very close. See Comments below. Thanks!
DeleteThat is one of the goosenecks of the San Juan, but the monocline is Raplee Ridge which is flexure which opposes Comb Ridge to the west.
ReplyDeleteYep! San Juan cutting through Raplee Ridge (downstream from Comb Ridge) and a gooseneck further downstream.
DeleteWhen I saw this teaser from you I had no idea what the answer was. I still don't, but the image stayed with me and today in one of our Sunday newspapers I saw what i thought was a very similar formation, Dead Horse Point in Utah. See the image here: http://yhoo.it/1HlPRmb I would be interested to know if the geology is broadly similar to your featured landscape.
ReplyDeleteAll the best :)
Yes! ... in both places the rivers are entrenched (see http://en.wikipedia.org/wiki/Entrenched_river) with spectacular entrenched or incised meanders. The rivers kept cutting down (didn't move) while the Colorado Plateau was gradually uplifted. Neat photo!
DeleteAnswers added as an Update above.
ReplyDelete