This is at Prins Christian Sund (“Sound”), South Greenland. The rocks are likely Palaeoproterozoic supracrustals – rocks that formed original as stratified rocks on Earth’s surface (sediments, volcanics) before being dunked down into Earth’s crustal interior and subjected to intense metamorphism and ductile deformation. Now, billions of years later, here they are back at the surface again.
The Nuvvuagittuq supracrustal belt in Quebec, composed of highly metamorphosed basalts and volcanic sediments. 4.3+ billion years in age, this is the oldest known part of the crust in the world, surviving from the Hadean eon.
One final stop was in Afton Canyon about 50 miles east of Barstow. This narrow passageway is where Lake Manix drained into Soda and Silver Lakes, apparently more than once in a catastrophic manner. We crossed the mighty Mojave Rover on foot and then walked up this side canyon to check out the flood deposits and the lake deposits high on the skyline. These mark the highest level Lake Manix reached before it overtopped its dam and drained very quickly.
You can't see the Rio Grande River, but it passes by the base of the cliff, just beyond the group of students in the lower right of the picture. Thus, the canyon walls in the distance are in Mexico. This narrow canyon was created when the Rio Grande cut down through massive fault-bounded blocks. You can see one of those huge faults cutting diagonally across the cliff in the distance.