Nice looking roots!
Iowa soil is very different from Appalacian soil. It's been deposited by a zillion years of Glacier movement. the soil there is almost black, dense, and rich. It's condusive to growing trees, crops, and other flora are at an excellerated rate- higher than our soils here back east. I'm not saying this is a bad thing, not at all.
i was wondering recently wether the soil there would grow 'Sang. with the photos posted here in this thread now I see what the differences are. I suspect that those roots are younger than the neck appears, due to the excellent soil conditions.
IowaGrown - can you describe [generally] where these roots grew? Hillside? Wooded riverbank? I mean, given that there are no real mountains in Iowa....