That looks very much like LDS attire, pre-1980's. The Morridor's population growth has exploded since then, finally peeps have been catching up to the rest of society. Each time I go back to visit, it's less recognziable. I still get misty eyed reminiscing about the sheltered cloister I grew up in.
Being LDS in a tightly wove Mormon community was a shelter of sorts from reality outside the bubble. Those days are gone forever.