No, they aren't. Otherwise, you wouldn't need this topic. One can be aware of their mythic origins without being aware of what came before it. I repeat that for someone living in the current age, previous ages just hold no import. Kalpas themselves are a recently introduced concept, and one which, judging from the way they're used, a relatively obscure theological term.
The idea of mythopoeia refers to the creation of myths. It's only ever been used as an adjective to refer to how Kagrenac controlled the heart. With or without knowledge of prior mythic landscape, this adjective still holds, as at the time it only ever referred to one myth. The recycling of myths is not terribly important because they are often the same myths: ?€?"If I could be assured the rude stars //Of our continuing houses// Would not already be in fits of remake..." says Mor to Pelinal.
I think you're playing fast and loose with the word eschatology, which only ever refers to the end of the world. Big emphasis on "end" since eschatos itself means "last" (though arguably it comes from a Western background, where time is linear and not cyclical) . Every large upset in the order of things is not an eschaton except in poetic terms. The Flood was not an eschaton. Neither was Marduk cutting Tiamat to pieces or Ialdabaoth's separation from the divine world or any number of comparable scenarios.
I've always kept silent on the issue of kalpas because I'm not exactly sure what to believe. As portrayed in the Aldudaggas, the period before the kalpa-turning shows a geography and political landscape not much different from what it is now, with a Red Mountain and a Snow Throat that gets eaten, becomes some formless "churning dragon stop" (Dragon Break or Dawn period, presumably), and then return, as we still have those landmarks:
In fact, after many looks east, west, south, and north, and seeing only the churning dragon stop around him, Dagon realied that at some point when he was begging with his eyes closed that Alduin had eaten him, mountaintop and all, and he had not heard the big chomp because he had been begging too loud. And he knew that the last world had been eaten entirely, except for its stolen portions, and that when the new kalpa began to form The Greedy Man (who never stayed trapped for long) would begin sticking these stolen portions back on in the craziest of places, and that he himself could never jump again until all was put back right.
Combined with the previous quote, that Mor and Pelinal's continuing houses are "already in fits of remake" makes me think the kalpa-turning might be something more along the lines of a fin de si?cle end-of-an-age sense than an end-of-the-world sense, despite the references to fiery destruction.
(Wants to avoid the magick Jilling action of Dogs Body, but feels this is relevant all the same.)
Take the classic "Armageddon" of biblical fame; The world of mortal affairs is destroyed utterly, and a new divine order is established. It can be argued that this cycle could be easily closed if some additional information is ad-libbed, as the creation of iniquity was spontaneous from perfection. The return to a perfect state sets the stage for iniquity to form, and from this iniquity the mortal world's future is sealed.
Thus, the creation is a destruction, and the destruction a creation. (I dont want to invite an argument of "thats not how the bible says it!", it was a hypothetical.)
A better view is the already circular reincarnation cycle of Buddhist tradition, http://neatorama.cachefly.net/images/2007-03/wheel-of-life.jpg
Likewise, It could be argued that the ruminations of the Godhead is an attempt for it to understand its own origin, and that the events that transpire inside the Aurbis are cyclical, and eternal. The end result of the Nu-man, assailing the Tower, et al, is the creation of the Godhead, where it creates itself, over and over again, and that the stages of "Primal place", "Aedric spheres and Daedric voids", "Mundaic wheel", "Nu-Man", "Primal Place" .... is just where your current vantage point is inside the cycle.
This would imply that even "Mortal" spirits are not truly mortal, even if they forget themselves over and over again.
It's like a case of "Which came first, the chicken or the egg?" but in this case, it is 'Which came first-- the beginning or the end?"