I also see it as being about time, but probably much longer than anyone else is thinking, I think this zodiac denotes a Platonic or Great Year, where each of the roundels are not months, but ages. That is why there are containers (architecture, infrastructure) and clothing (culture, language) in the more recent ages, but not the rest, everyone is naked and nomadic for most of it. That would be because written or unearthed history only goes back for about 3 or 4 ages, and brings us to the ice age, or its aftermath (flooding). It also starts with Pisces because that is and was the current age.
Looking at it this way puts a different spin on the nymphs in quire 13, which in my interpretation is a periplus around an ecumene that existed during the age of Aries. The lack of clothing and architecture could mean we are looking at the world from a more prehistorical perspective, from when these places were first inhabited. Could explain why (sometimes dormant) volcanoes and hot springs seem to be emphasized, they would have been the places inhabited during the ice ages.