I really don't think it specifies. I highly doubt it's supposed to be any certain era, it's just the mangaka's made up world.
Naruto is manga.
i would say that would be in episode 437 on the manga series.
Manga is the original Naruto/Naruto Shippuden source in which the anime comes from.
There is a manga for Naruto SD. See the related link for the online manga.
Yes, it is one of the best manga. i would think it a matter of opinion..
the manga fully stop all the episodes after 136 then go to naruto shippuden. you would know what naruto shippuden is if you went to the following websites saiyanisland.com leafninja.com naruto.com
The catergory naruto would fit in is manga.
Naruto and Naruto Shippuden are also made into an anime as well as a manga.
No, Naruto is Manga
Naruto "colored manga" doesn't exist. Kishimoto draws the manga in black and white, with occasional colored pages to open chapters. There is colored animanga (manga made using colored snapshots of the animation) for the movies, but this is not the official Naruto manga. Also, all of the covers of the Naruto manga volumes are in color.
Naruto shippuuden starts at chapter 245 in the Naruto Manga
I am not sure what magma is, but i think you mean manga?? Manga is just the comic book version of it, Naruto started as a manga :]