Moving to the right of the upright anticline, a geologist would encounter a thrust fault placing the orange and green layers atop a much younger blue layer that defines the top of the folded/thrusted section of layers (“top of section,” above). The thrust fault to the right of the anticline, which places orange and green atop the younger “top of section” layers, might suggest orange and green extend beneath the upright anticline. Thickening of the weak white “shale” layers is significant, with the middle shale layer (number 2) showing extreme thickening below the upright anticline.