22 June 2012

Friday fold: an asymmetric anticline from Wyoming

Posted by Callan Bentley

Another landform seen out the window of that very productive photo-flight last March:

That’s a breached plunging anticline – doubtless a Laramide structure. This was over Wyoming; I think here.

Looking north-ish, along the axis of the fold:

Note that the lengths of section line A and B are not equal: this anticline is asymmetric. The facing direction of the hogbacks on the left (west) indicate it’s not overturned, but those strata are definitely dipping more steeply than their counterparts on the eastern limb of the fold.

Happy Friday!