Upfold

I lie on my side, head sunk in the pillow, legs upfolded, as if for Indian burial.

Source: wiktionary

The two little boys in the picture wore short pants and short, wide double breasted jackets over white shirts with white upfolded collars and black bow ties that looked terribly uncomfortable judging by the grimace on the chubby faces.

Source: wiktionary

A groove in the cortex is called a fissure or a sulcus, and the upfolded tissue between two sulci is a gyrus.

Source: wiktionary

Thus the Pentland Hills form an anticline of Upper Silurian Rocks (shales and grits), over which the Carboniferous Rocks were upfolded.

Source: wiktionary