Sinjar MountainsThis image from the Landsat 8 satellite shows the Sinjar Mountains in Northwestern I

Sinjar MountainsThis image from the Landsat 8 satellite shows the Sinjar Mountains in Northwestern Iraq. The Sinjar Mountains are a gorgeous example of a doubly-plunging anticline. An anticline forms when older rocks are pushed upwards, creating a concave downward arch. Here, older rocks from the Miocene have been pushed up at the center to form the ridge. There used to be younger layers on top of the ridge, but they have eroded away, leaving a ring pattern around the anticline. The anticline has been uplifted the most at the center, but the deformation stops at the edges, so the fold “plunges” to each side, creating the ring pattern.If you zoom in on the northwest edge of this mountain, you can see that some of the layers actually repeat there – a small normal fault has broken through and the map pattern of that fault is that the layers at the edge have repeated.This area was important in the recent wars ongoing in western Iraq, as this set of mountains formed the home of the Yazidi culture, that was surrounded and besieged by the group ISIS. Although the siege was broken, many thousands of refugees still are living on or in this mountain range, with limited supplies reaching this location.-JBBImage credit: NASA/USGS/Landsathttps://commons.wikimedia.org/wiki/File:Sinjar_Mountains.pngReferences:https://n.pr/2E5CcTohttps://howlingpixel.com/i-en/Sinjar_Mountainshttps://bit.ly/2LB5D4m -- source link

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