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Jim, Gustavo, and Jon, thank you for the comments!
Yes, Glacier has the best rocks ever!
Gustavo, Glacier is made mostly of sedimentary rocks, but I think I've seen some signs of volcanic activity towards northern part of the park. #5 was taken on Iceberg Lake trail, there are many interesting formations with this kind of rock exposed, for example, the one below that looks like a giant staircase: