After almost winning WOGE #300, I was motivated to spend way too much time trying to locate the interesting rock formations in WOGE #301. I usually narrow my search area by looking to see what part of the world someone's previous WOGE posts were in, but Péter Luffi has won so many times that it was no help. I just kept looking in every southern hemisphere desert I could think of, until I finally found the spot in arid western Argentina.
Below is WOGE #302. Please note that I have used an "historic image" from Google Earth not just to make things more difficult, but because this image shows the features of geologic interest a little more clearly than the current one.
Now that this edition of WOGE has been solved, I will provide some color. Felix Bossert shares an excellent description of the geology in his comment.