Well, actually, Stan Rogers did write sea songs, and to the degree that they could be used while doing the various tasks on a ship, they would be chanties--as to to kolo, poeple are writing kolos in 1999, I wrote a couple myself, a few years back--all you need is for the dancers to be able to dance to it, and it is a kolo--the same with a hula--does't have to be from anywhere or anyone special, if the dancers can dance to it, it's a hula--no problem there--Miss Otis Regrets was a parody of murder ballads--
I suppose I should be humbled by your remark about folk music being discernable to those who know what it is--but I am kind of thick headed-- I sure would appreciate a list from you, examples of songs, styles, and artists, so we could beat this thing into the ground good and sound--
As existing independently from popular, classical, art, and jazz--None of those media could exist without folk music, so I find it unlikely that folk music could exist without them--
Grunge existed, possibly without the name, but certainly with out the fame before any of the record companies caught on to it--