[Eagles6]

Hmm...and here I thoght that they had settled on the Milankovitch cycles.

http://www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htm

[DBrow]

The ice age in question does not follow Milankovitch cycles, which is why people are thinking impact? Freshwater flood? Caveman SUV?

Otherwise on a long time scale Milankovitch works pretty well unless you are a warmist.