The "Finland" is a pun--it has nothing to do with the country, it's because harder layers weather out as fins! (And blades, and ridges, and even more complex shapes.) The rock unit is the Aztec Sandstone, a red sandstone unit that accounts for lots of scenery in this part of the world. It's the same as the Navajo Sandstone in Arizona and Utah--the different name here is from those "historical reasons." The inserts show some other views.