[JeffF.]

I'm away from my books but I remember reading that Mount Dolmed in Beleriand survived as an island off the coast of Ered Lindon near the Gulf of Lune and the Dwarf holds in Northern and Southern Ered Luin were remnants of Belegost and Nogrod. That would put the Third Age Middle Earth roughtly East by South East of Beleriand as a whole.