Blogging from A to Z Challenge. For those unfamiliar with the concept, it's basically about 26 posts (we don't post Sundays), preferably on a theme, blogging our way through the alphabet from A to Z. My theme this year is all about TV Tropes, celebrating random tropes with some sort of weird, odd, unusual, controversial, or taboo element that appeals to my warped sense of literary adventure.
Continuing the theme, we have Unspecified Apocalypse (check out the page for a complete definition, but your first guess is probably pretty close to the mark). After a quick perusal of the Literature examples provided, I've gotta go with:
"Perdido Street Station series. The khepri of the Bas-Lag novels fled their native continent en masse to escape a disaster known as "the Ravening". Whatever it was, it traumatized their kind so completely that none of the survivors of their 25-year sea journey to Bas-Lag ever passed on the details of the catastrophe, or of the ancient khepri culture it destroyed, to their descendants."