There are several notable mountains in Middle-earth, like Erebor and the Misty Mountains, but Mount Doom, the volcano at the heart of Sauron’s wicked kingdom of Mordor, maybe the most significant to the plot. We learned a shocking and explosive genesis tale for the series’ most well-known volcano in the most recent episode of Amazon’s The Lord of the Rings: The Rings of Power.
First, let me respond to the most apparent query: yes, the eruption at the episode’s conclusion was Mount Doom. In case you, like Galadriel, have trouble recalling what Middle-earth looks like on a map, Ostirith, the besieged settlement, is located in the Southlands of The Rings of Power, which also happens to be the location of Mordor, which will eventually arise.
The development of the country from lush fields and lovely mountains appears to have been planned out in great detail by either Morgoth or Sauron and was brought about by the sword-key, which unleashed a tremendous torrent. Because of the tunnels, the orcs had already constructed, this deluge completely wrecked the area and caused Mount Doom (which, at the time of the program, didn’t yet have that name) to erupt. It seems as though the miles-wide area that was burnt by this eruption’s molten rock and lava will remain that way forever, or at least until Frodo, Sam, and Gollum reach there with the One Ring.
Even while Tolkien’s legend about Mount Doom isn’t very specific, the show’s plot does appear to generally fit. There is no indication of an intended flood being the source of the eruption itself, even though we know the region wasn’t always known as Mordor and that the term most likely arose after the eruption of Mount Doom.
We’ll just have to wait to see where The Rings of Power takes its tale to see what happens to the area next and how long it takes for Sauron to settle there.