can a site.master page have its own site.master page

Question

can you have it where one site master page itself has a site master page to allow layers of shared "base" code?

Answer 1

Yes, when creating a master page, you can specify a master page for it.

(Also, you can name master pages whatever you want -> Temp.Master, master.master)

Answer 2

The answers to this very similar question may be helpful: Are there nested master pages in ASP.NET MVC? Yes, you can use nested master pages in MVC, as you can with "classic" ASP.Net.