Creation Myth

"Dwerfater made the Valley for dwarves, as he was the first of their people, and filled mountains with mithral, so that those who would follow him would never be wanting; in his generosity they would build to him, using his gifts for great works."
That's all well and good, but is it true? Did Dwerfater create the Valley?
The very short answer is "no". "...made the Valley" here is a slight mistranslation, a better translation would read "created the Valley by piling up mountains all around a plain". 
Was Dwerfater the first dwarf? Also "no", he was simply "the first of their people" which means that he was either the first dwarf to arrive in the area, or possibly was created by Torag himself.
Creation myth in the world which contains the Stoneheart Valley has this problem as a running theme: Everyone and everything was created by something else, and the process goes as far back as people have bothered to record history. An (ironically unrecorded) calamity just over 10,000 years ago destroyed 99.9% of all historical documents, so people are left with fragments of truth held together with a lot of guesswork.
What makes things worse is that while gods are capable of great feats of power and creation, the status of "god" is a grey area. Archmage Fondon can move through planes as easy as fish through water, and Archmage Speigal was such a great diviner that gods coveted his power, yet neither were gods. Kel (it is said) was just a normal person, who was raised up to heaven by Mitra to serve as the Lady of Protection. "God" is just a label, and is no more set in stone than any other.
If there are turtles most of the way down, then it follows there must have been some beginning. The draconic myth of Apsu and Tiamat is by far the most common, and very good religion. That is to say, beings that mortals can't comprehend doing things for reasons that mortals can't comprehend. Also, it just so happens that Golorian is the planet that Apsu finally made his home, so it must be true.
Ego is a fatal flaw in many religious beliefs. On a grand scale, if a story is told about how your race/homeland/etc is super-special-awesome, it's fair to guess that the story was told for some purpose other than historical accuracy. On a smaller scale however, in a world so peppered with gods and demons and so on, it's understandable that some things may have been created for the direct benefit of a small, specific group.
To the people of the Valley, it makes sense that Dwerfater created the mountains for the dwarves. It follows that Torag created Dwerfater and the other dwarves for the land. Perhaps some greater god created Torag, and the world as well. By that logic, the creation of the multiverse must have been by some creature or concept that did not require to be created itself. To the dragons, it was Tiamat and Apsu. The more nature-inclined folk suspect that the primal forces exist even in a vacant universe. Demons say that there is no such thing as a vacant universe, then Abyss is infinite and timeless, and all other planes are just islands in its unfathomable bulk. Many scholars agree on principle, but suggest it is the Maelstrom, not the abyss that is infinite and timeless. Some folks believe in an uber-god that exists outside of time, but that just seems to be dodging the question.
The truth is that the end of the world seems to be a more pressing concern than the end. The fourth and fifth age, no new gods have come forth, and several have died. The prosperity and population of the world have begun to dwindle, and things look only to get worse. The old things that were around when the world was young - the demon lords below and the elder gods above - have begun to slowly circle the dying world, waiting for the time to be right.