Concrete Aggregates: Crushed vs Natural(Rounded)

[AKSherpa]

I am interested in others experiences, thoughts, knowledge, ect. concerning concrete aggregates, specifically crushed vs. non-crushed. When I lived in midwest US it was comon to use crushed products in concrete. I am now in Alaska where it is much more common to use alluvial aggregates for concrete. Occasionally in Alaska I have come across situations where people have the opinion that crushed aggregates can't be used for concrete. This situation has occured where a very large difference in cost could be incurred for importing natural aggregates vs. using locally crushed aggregates.

Any comments on this issue appreciated.

Thanks